Results for "F. Pajot"

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Deep Learning for Physical Processes: Incorporating Prior Scientific KnowledgeNov 21 2017Jan 09 2018We consider the use of Deep Learning methods for modeling complex phenomena like those occurring in natural physical processes. With the large amount of data gathered on these phenomena the data intensive paradigm could begin to challenge more traditional ... More
Towards mapping the turbulence in the intra-cluster medium -- II. Measurement uncertainties in the estimation of structure functionsApr 12 2019X-ray observations of the hot gas filling the intra-cluster medium provide a wealth of information on the dynamics of clusters of galaxies. The global equilibrium of the ICM is believed to be partially ensured by non-thermal pressure support, notably ... More
The Planck High Frequency Instrument, a 3rd generation CMB experiment, and a full sky submillimeter surveyAug 05 2003The High Frequency Instrument (HFI) of Planck is the most sensitive CMB experiment ever planned. Statistical fluctuations (photon noise) of the CMB itself will be the major limitation to the sensitivity of the CMB channels. Higher frequency channels will ... More
Study of Cosmic Ray Impact on Planck/HFI Low Temperature DetectorsApr 04 2014Apr 16 2014After the focal plane of the HFI instrument of the Planck mission (launched in May 2009) reached its operational temperature, we observed thermal signatures of interactions of cosmic rays with the Planck satellite, located at the L2 Lagrange point. When ... More
The Galactic dust as a foreground to Cosmic Microwave Background mapsAug 06 2003We present results obtained with the PRONAOS balloon-borne experiment on interstellar dust. In particular, the submillimeter / millimeter spectral index is found to vary between roughly 1 and 2.5 on small scales (3.5' resolution). This could have implications ... More
Learning Dynamical Systems from Partial ObservationsFeb 26 2019We consider the problem of forecasting complex, nonlinear space-time processes when observations provide only partial information of on the system's state. We propose a natural data-driven framework, where the system's dynamics are modelled by an unknown ... More
Inverse temperature dependence of the dust submillimeter spectral indexOct 03 2003We present here a compilation of PRONAOS-based results concerning the temperature dependence of the dust submillimeter spectral index, including data from Galactic cirrus, star-forming regions and a circumstellar envelope. We observe large variations ... More
Analysis of ProNaOS submillimeter maps in the M42 Orion Nebula - Temperature - spectral index inverse correlation in several regionsFeb 06 2001We have mapped with the French submillimeter balloon-borne telescope ProNaOS the thermal emission of the dust in the M42 Orion Nebula. The map obtained is 50' by 40' with an angular resolution of about 3' in the four efficient wavelengths 200 $\mic$, ... More
New insights on the thermal dust from the far-infrared to the centimeterOct 28 2003We present a compilation of PRONAOS-based results concerning the temperature dependence of the dust submillimeter spectral index, including data from Galactic cirrus, star-forming regions, dust associated to a young stellar object, and a spiral galaxy. ... More
The complete submillimetre spectrum of NGC 891May 13 2003May 15 2003Submillimetre maps of NGC 891 have been obtained with the PRONAOS balloon-borne telescope and with the ISOPHOT instrument on board the ISO satellite. In this article, we also gather data from IRAS and SCUBA to present the complete submillimetre spectrum ... More
Submillimeter dust emission of the M17 complex measured with PRONAOSJun 19 2002We map a 50' x 30' area in and around the M17 molecular complex with the French submillimeter balloon-borne telescope PRONAOS, in order to better understand the thermal emission of cosmic dust and the structure of the interstellar medium. The PRONAOS-SPM ... More
Submillimeter mapping and analysis of cold dust condensations in the Orion M42 star forming complexFeb 23 2001We present here the continuum submillimeter maps of the molecular cloud around the M42 Nebula in the Orion region. These have been obtained in four wavelength bands (200, 260, 360 and 580 microns) with the ProNaOS two meter balloon-borne telescope. The ... More
Inverse temperature dependence of the dust submillimeter spectral indexApr 14 2003We present a compilation of PRONAOS-based results concerning the temperature dependence of the dust submillimeter spectral index, including data from Galactic cirrus, star-forming regions, dust associated to a young stellar object, and a spiral galaxy. ... More
Unlocking the Capabilities of Future High-Resolution X-ray Spectroscopy Missions Through Laboratory AstrophysicsMar 19 2019Thanks to high-resolution and non-dispersive spectrometers onboard future X-ray missions such as XRISM and Athena, we are finally poised to answer important questions about the formation and evolution of galaxies and large-scale structure. However, we ... More
First measurement of the submillimetre Sunyaev-Zel'dovich effectJun 09 1998Sep 03 1998We report the first detection of the Sunyaev-Zel'dovich increment on the cosmic microwave background (CMB) at submillimetre wavelengths in the direction of a cluster of galaxies.It was achieved towards the rich cluster Abell 2163, using the PRONAOS 2-metre ... More
Athena X-IFU synthetic observations of galaxy clusters to probe the chemical enrichment of the UniverseSep 24 2018Answers to the metal production of the Universe can be found in galaxy clusters, notably within their Intra-Cluster Medium (ICM). The X-ray Integral Field Unit (X-IFU) on board the next-generation European X-ray observatory Athena (2030s) will provide ... More
QUBIC - The Q&U Bolometric Interferometer for Cosmology - A novel way to look at the polarized Cosmic Microwave BackgroundJan 11 2018In this paper we describe QUBIC, an experiment that takes up the challenge posed by the detection of primordial gravitational waves with a novel approach, that combines the sensitivity of state-of-the art bolometric detectors with the systematic effects ... More
Submillimeter and Far-InfraRed Experiment (SAFIRE): A PI class instrument for SOFIAMar 24 2000SAFIRE is a versatile imaging Fabry-Perot spectrograph covering 145 to 655 microns, with spectral resolving powers ranging over 5-10,000. Selected as a "PI" instrument for the airborne Stratospheric Observatory for Infrared Astronomy (SOFIA), SAFIRE will ... More
Thermal architecture for the QUBIC cryogenic receiverNov 06 2018QUBIC, the QU Bolometric Interferometer for Cosmology, is a novel forthcoming instrument to measure the B-mode polarization anisotropy of the Cosmic Microwave Background. The detection of the B-mode signal will be extremely challenging; QUBIC has been ... More
In-flight measurement of Planck telescope emissivityJan 29 2018The Planck satellite in orbit mission ended in October 2013. Between the end of Low Frequency Instrument (LFI) routine mission operations and the satellite decommissioning, a dedicated test was also performed to measure the Planck telescope emissivity. ... More
Planck intermediate results. XXII. Frequency dependence of thermal emission from Galactic dust in intensity and polarizationMay 05 2014May 11 2015Planck has mapped the intensity and polarization of the sky at microwave frequencies with unprecedented sensitivity. We make use of the Planck 353 GHz I, Q, and U Stokes maps as dust templates, and cross-correlate them with the Planck and WMAP data at ... More
Planck intermediate results. XV. A study of anomalous microwave emission in Galactic cloudsSep 05 2013May 17 2014Anomalous microwave emission (AME) is believed to be due to electric dipole radiation from small spinning dust grains. The aim of this paper is a statistical study of the basic properties of AME regions and the environment in which they emit. We used ... More
Planck intermediate results. XLII. Large-scale Galactic magnetic fieldsJan 04 2016May 18 2016Recent models for the large-scale Galactic magnetic fields in the literature have been largely constrained by synchrotron emission and Faraday rotation measures. We use three different but representative models to compare their predicted polarized synchrotron ... More
Planck intermediate results. XXXIII. Signature of the magnetic field geometry of interstellar filaments in dust polarization mapsNov 09 2014Jul 01 2015Planck observations at 353GHz provide the first fully-sampled maps of the polarized dust emission towards interstellar filaments and their backgrounds. The polarization data provide insight on the structure of their magnetic field (B). We present the ... More
Planck early results. VI. The High Frequency Instrument data processingJan 11 2011Dec 23 2011We describe the processing of the 336 billion raw data samples from the High Frequency Instrument (HFI) which we performed to produce six temperature maps from the first 295 days of Planck-HFI survey data. These maps provide an accurate rendition of the ... More
Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt SystemJan 24 2013May 31 2013We perform an analysis of the diffuse low-frequency Galactic components in the Southern part of the Gould Belt system (130^\circ\leq l\leq 230^\circ and -50^\circ\leq b\leq -10^\circ). Strong ultra-violet (UV) flux coming from the Gould Belt super-association ... More
Planck intermediate results. XLI. A map of lensing-induced B-modesDec 09 2015Sep 23 2016The secondary cosmic microwave background (CMB) $B$-modes stem from the post-decoupling distortion of the polarization $E$-modes due to the gravitational lensing effect of large-scale structures. These lensing-induced $B$-modes constitute both a valuable ... More
NIKA 2: next-generation continuum/polarized camera at the IRAM 30 m telescope and its prototypeFeb 04 2016NIKA 2 (New Instrument of Kids Array) is a next generation continuum and polarized instrument successfully installed in October 2015 at the IRAM 30 m telescope on Pico-Veleta (Granada, Spain). NIKA 2 is a high resolution dual-band camera, operating with ... More
High resolution SZ observations at the IRAM 30-m telescope with NIKASep 03 2014High resolution observations of the thermal Sunyaev-Zel'dovich (tSZ) effect are necessary to allow the use of clusters of galaxies as a probe for large scale structures at high redshifts. With its high resolution and dual-band capability at millimeter ... More
Planck early results: first assessment of the High Frequency Instrument in-flight performanceJan 11 2011The Planck High Frequency Instrument (HFI) is designed to measure the temperature and polarization anisotropies of the Cosmic Microwave Background and galactic foregrounds in six wide bands centered at 100, 143, 217, 353, 545 and 857 GHz at an angular ... More
The NIKA 2012-2014 observing campaigns: control of systematic effects and resultsSep 02 2014The New IRAM KID Array (NIKA) is a dual-band camera operating with frequency multiplexed arrays of Lumped Element Kinetic Inductance Detectors (LEKIDs) cooled to 100 mK. NIKA is designed to observe the intensity and polarisation of the sky at 1.25 and ... More
Detection of the tSZ effect with the NIKA cameraDec 10 2013We present the first detection of the thermal Sunyaev-Zel'dovich (tSZ) effect from a cluster of galaxies performed with a KIDs (Kinetic Inductance Detectors) based instrument. The tSZ effect is a distortion of the black body CMB (Cosmic Microwave Background) ... More
Latest NIKA results and the NIKA-2 projectOct 04 2013Sep 10 2014NIKA (New IRAM KID Arrays) is a dual-band imaging instrument installed at the IRAM (Institut de RadioAstronomie Millimetrique) 30-meter telescope at Pico Veleta (Spain). Two distinct Kinetic Inductance Detectors (KID) focal planes allow the camera to ... More
The NIKA instrument: results and perspectives towards a permanent KID based camera for the Pico Veleta observatoryDec 17 2013The New IRAM KIDs Array (NIKA) is a pathfinder instrument devoted to millimetric astronomy. In 2009 it was the first multiplexed KID camera on the sky; currently it is installed at the focal plane of the IRAM 30-meters telescope at Pico Veleta (Spain). ... More
First observation of the thermal Sunyaev-Zel'dovich effect with kinetic inductance detectorsOct 23 2013Sep 03 2014Clusters of galaxies provide valuable information on the evolution of the Universe and large scale structures. Recent cluster observations via the thermal Sunyaev-Zel'dovich (tSZ) effect have proven to be a powerful tool to detect and study them. In this ... More
Performance and calibration of the NIKA camera at the IRAM 30 m telescopeFeb 02 2014Sep 02 2014The New IRAM KID Array (NIKA) instrument is a dual-band imaging camera operating with Kinetic Inductance Detectors (KID) cooled at 100 mK. NIKA is designed to observe the sky at wavelengths of 1.25 and 2.14 mm from the IRAM 30 m telescope at Pico Veleta ... More
PILOT: a balloon-borne experiment to measure the polarized FIR emission of dust grains in the interstellar mediumOct 13 2014Future cosmology space missions will concentrate on measuring the polarization of the Cosmic Microwave Background, which potentially carries invaluable information about the earliest phases of the evolution of our universe. Such ambitious projects will ... More
Calibration and First light of the Diabolo photometer at the Millimetre and Infrared Testa Grigia ObservatoryDec 17 1999We have designed and built a large-throughput dual channel photometer, Diabolo. This photometer is dedicated to the observation of millimetre continuum diffuse sources, and in particular, of the Sunyaev-Zel'dovich effect and of anisotropies of the 3K ... More
Planck 2013 results. XV. CMB power spectra and likelihoodMar 20 2013Mar 25 2013We present the Planck likelihood, a complete statistical description of the two-point correlation function of the CMB temperature fluctuations. We use this likelihood to derive the Planck CMB power spectrum over three decades in l, covering 2 <= l <= ... More
Planck 2013 results. XVIII. Gravitational lensing-infrared background correlationMar 20 2013The multi-frequency capability of the Planck satellite provides information both on the integrated history of star formation (via the cosmic infrared background, or CIB) and on the distribution of dark matter (via the lensing effect on the cosmic microwave ... More
Planck 2015 results. XVII. Constraints on primordial non-GaussianityFeb 05 2015Jul 19 2016The Planck full mission cosmic microwave background(CMB) temperature and E-mode polarization maps are analysed to obtain constraints on primordial non-Gaussianity(NG). Using three classes of optimal bispectrum estimators - separable template-fitting (KSW), ... More
Characterization and Physical Explanation of Energetic Particles on Planck HFI InstrumentMar 22 2014The Planck High Frequency Instrument (HFI) has been surveying the sky continuously from the second Lagrangian point (L2) between August 2009 and January 2012. It operates with 52 high impedance bolometers cooled at 100mK in a range of frequency between ... More
Planck Early Results XXIV: Dust in the diffuse interstellar medium and the Galactic haloJan 11 2011Sep 28 2011This paper presents the first results of comparison of Planck along with IRAS data with Green Bank Telescope 21-cm observations in 14 fields covering more than 800 square degrees at high Galactic latitude. Galactic dust emission for fields with average ... More
Planck 2013 results. VIII. HFI photometric calibration and mapmakingMar 20 2013Jan 21 2014This paper describes the processing applied to the HFI cleaned time-ordered data to produce photometrically calibrated maps. HFI observes the sky over a broad range of frequencies, from 100 to 857 GHz. To get the best accuracy on the calibration on such ... More
Planck 2013 results. XIV. Zodiacal emissionMar 20 2013Apr 14 2014The Planck satellite provides a set of all-sky maps at nine frequencies from 30 GHz to 857 GHz. Planets, minor bodies, and diffuse interplanetary dust emission (IPD) are all observed. The IPD can be separated from Galactic and other emissions because ... More
Planck 2013 results. VI. High Frequency Instrument data processingMar 20 2013Jul 23 2014We describe the processing of the 531 billion raw data samples from the High Frequency Instrument (hereafter HFI), which we performed to produce six temperature maps from the first 473 days of Planck-HFI survey data. These maps provide an accurate rendition ... More
Planck 2013 results. XXX. Cosmic infrared background measurements and implications for star formationSep 02 2013We present new measurements of CIB anisotropies using Planck. Combining HFI data with IRAS, the angular auto- and cross frequency power spectrum is measured from 143 to 3000 GHz, and the auto-bispectrum from 217 to 545 GHz. The total areas used to compute ... More
Planck 2013 results. XII. Component separationMar 20 2013Planck has produced detailed all-sky observations over nine frequency bands between 30 and 857 GHz. These observations allow robust reconstruction of the primordial cosmic microwave background (CMB) temperature fluctuations over nearly the full sky, as ... More
Planck 2015 results. XV. Gravitational lensingFeb 05 2015Sep 22 2016We present the most significant measurement of the cosmic microwave background (CMB) lensing potential to date (at a level of 40 sigma), using temperature and polarization data from the Planck 2015 full-mission release. Using a polarization-only estimator ... More
Planck 2015 results. VIII. High Frequency Instrument data processing: Calibration and mapsFeb 05 2015Jul 17 2015This paper describes the processing applied to the Planck High Frequency Instrument (HFI) cleaned, time-ordered information to produce photometrically calibrated maps in temperature and (for the first time) in polarization. The data from the entire 2.5 ... More
Planck 2015 results. XXVI. The Second Planck Catalogue of Compact SourcesJul 08 2015Feb 15 2016The Second Planck Catalogue of Compact Sources is a catalogue of sources detected in single-frequency maps from the full duration of the Planck mission and supersedes previous versions of the Planck compact source catalogues. It consists of compact sources, ... More
Planck 2013 results. XIII. Galactic CO emissionMar 20 2013Mar 25 2013Rotational transition lines of CO play a major role in molecular radio astronomy and in particular in the study of star formation and the Galactic structure. Although a wealth of data exists in the Galactic plane and some well-known molecular clouds, ... More
Planck 2015 results. XX. Constraints on inflationFeb 07 2015Sep 14 2017We present the implications for cosmic inflation of the Planck measurements of the cosmic microwave background (CMB) anisotropies in both temperature and polarization based on the full Planck survey. The Planck full mission temperature data and a first ... More
Planck 2013 results. IX. HFI spectral responseMar 20 2013Nov 25 2013The Planck High Frequency Instrument (HFI) spectral response was determined through a series of ground based tests conducted with the HFI focal plane in a cryogenic environment prior to launch. The main goal of the spectral transmission tests was to measure ... More
Planck early results. XXI. Properties of the interstellar medium in the Galactic planeJan 11 2011Dec 08 2011(abridged) Planck has observed the entire sky from 30 GHz to 857GHz. The observed foreground emission contains contributions from different phases of the interstellar medium (ISM). We have separated the observed Galactic emission into the different gaseous ... More
Planck 2015 results. XVI. Isotropy and statistics of the CMBJun 23 2015Jan 22 2016We test the statistical isotropy and Gaussianity of the cosmic microwave background (CMB) anisotropies using observations made by the Planck satellite. Our results are based mainly on the full Planck mission for temperature, but also include some polarization ... More
Planck 2015 results. XII. Full Focal Plane simulationsSep 21 2015We present the 8th Full Focal Plane simulation set (FFP8), deployed in support of the Planck 2015 results. FFP8 consists of 10 fiducial mission realizations reduced to 18144 maps, together with the most massive suite of Monte Carlo realizations of instrument ... More
Planck 2015 results. X. Diffuse component separation: Foreground mapsFeb 05 2015Feb 25 2015Planck has mapped the microwave sky in nine frequency bands between 30 and 857 GHz in temperature and seven bands between 30 and 353 GHz in polarization. In this paper we consider the problem of diffuse astrophysical component separation, and process ... More
Planck 2015 results. XXV. Diffuse low-frequency Galactic foregroundsJun 22 2015Jun 11 2016(abridged) We discuss the Galactic foreground emission between 20 and 100GHz based on observations by Planck/WMAP. The Commander component-separation tool has been used to separate the various astrophysical processes in total intensity. Comparison with ... More
Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dustMay 05 2014This paper presents the large-scale polarized sky as seen by Planck HFI at 353 GHz, which is the most sensitive Planck channel for dust polarization. We construct and analyse large-scale maps of dust polarization fraction and polarization direction, while ... More
Planck Early Results: The submillimetre properties of a sample of Galactic cold clumpsJan 11 2011(abridged) We perform a detailed investigation of sources from the Cold Cores Catalogue of Planck Objects (C3PO). Our goal is to probe the reliability of the detections, validate the separation between warm and cold dust emission components, provide the ... More
Impact of particles on the Planck HFI detectors: Ground-based measurements and physical interpretationMar 26 2014Sep 02 2014The Planck High Frequency Instrument (HFI) surveyed the sky continuously from August 2009 to January 2012. Its noise and sensitivity performance were excellent, but the rate of cosmic ray impacts on the HFI detectors was unexpectedly high. Furthermore, ... More
Planck Early Results: The Galactic Cold Core Population revealed by the first all-sky surveyJan 11 2011We present the statistical properties of the first version of the Cold Core Catalogue of Planck Objects (C3PO), in terms of their spatial distribution, temperature, distance, mass, and morphology. We also describe the statistics of the Early Cold Core ... More
Planck 2015 results. IX. Diffuse component separation: CMB mapsFeb 20 2015We present foreground-reduced CMB maps derived from the full Planck data set in both temperature and polarization. Compared to the corresponding Planck 2013 temperature sky maps, the total data volume is larger by a factor of 3.2 for frequencies between ... More
Planck intermediate results. XXI. Comparison of polarized thermal emission from Galactic dust at 353 GHz with interstellar polarization in the visibleMay 05 2014Mar 12 2015The Planck survey provides unprecedented full-sky coverage of the submillimetre polarized emission from Galactic dust, bringing new constraints on the properties of dust. The dust grains that emit the radiation seen by Planck in the submillimetre also ... More
NIKA 150 GHz polarization observations of the Crab nebula and its spectral energy distributionApr 25 2018May 06 2018The Crab nebula is a supernova remnant exhibiting a highly polarized synchrotron radiation at radio and millimeter wavelengths. It is the brightest source in the microwave sky with an extension of 7 by 5 arcminutes and commonly used as a standard candle ... More
The NIKA2 commissioning campaign: performance and first resultsMay 27 2016May 31 2016The New IRAM KID Array 2 (NIKA 2) is a dual-band camera operating with three frequency-multiplexed kilopixels arrays of Lumped Element Kinetic Inductance Detectors (LEKID) cooled at 150 mK. NIKA 2 is designed to observe the intensity and polarisation ... More
Planck 2015 results. XXVIII. The Planck Catalogue of Galactic Cold ClumpsFeb 05 2015We present the Planck Catalogue of Galactic Cold Clumps (PGCC), an all-sky catalogue of Galactic cold clump candidates detected by Planck. This catalogue is the full version of the Early Cold Core (ECC) catalogue, which was made available in 2011 with ... More
Planck 2015 results. XIII. Cosmological parametersFeb 05 2015Jun 17 2016We present results based on full-mission Planck observations of temperature and polarization anisotropies of the CMB. These data are consistent with the six-parameter inflationary LCDM cosmology. From the Planck temperature and lensing data, for this ... More
Planck intermediate results. XVII. Emission of dust in the diffuse interstellar medium from the far-infrared to microwave frequenciesDec 19 2013May 07 2014The dust-HI correlation is used to characterize the emission properties of dust in the diffuse interstellar medium. We cross-correlate sky maps from Planck, WMAP, and DIRBE, at 17 frequencies from 23 to 3000 GHz, with the Parkes survey of the 21-cm line ... More
Planck Early Results: All sky temperature and dust optical depth from Planck and IRAS: Constraints on the "dark gas" in our galaxyJan 11 2011We construct an all-sky map of the apparent temperature and optical depth of thermal dust emission using the Planck-HFI and IRAS data. The optical depth maps are correlated to tracers of the atomic and molecular gas. The correlation is linear in the lowest ... More
Planck intermediate results. XXX. The angular power spectrum of polarized dust emission at intermediate and high Galactic latitudesSep 19 2014Dec 08 2014The polarized thermal emission from Galactic dust is the main foreground present in measurements of the polarization of the cosmic microwave background (CMB) at frequencies above 100GHz. We exploit the Planck HFI polarization data from 100 to 353GHz to ... More
Planck Early Results: Thermal dust in Nearby Molecular CloudsJan 11 2011Aug 25 2011Planck allows unbiased mapping of Galactic sub-millimetre and millimetre emission from the most diffuse regions to the densest parts of molecular clouds. We present an early analysis of the Taurus molecular complex, on line-of-sight-averaged data and ... More
Sub-structure and merger detection in resolved NIKA Sunyaev-Zel'dovich images of distant clustersDec 05 2017Sub-structures in the hot gas of galaxy clusters are related to their formation history and to the astrophysical processes at play in the intracluster medium (ICM). The thermal Sunyaev-Zel'dovich (tSZ) effect is directly sensitive to the line-of-sight ... More
Planck early results. XX. New light on anomalous microwave emission from spinning dust grainsJan 11 2011Dec 07 2011Anomalous microwave emission (AME) has been observed by numerous experiments in the frequency range ~10-60 GHz. Using Planck maps and multi-frequency ancillary data, we have constructed spectra for two known AME regions: the Perseus and Rho Ophiuchi molecular ... More
Mapping the kinetic Sunyaev-Zel'dovich effect toward MACS J0717.5+3745 with NIKAJun 24 2016Measurement of the gas velocity distribution in galaxy clusters provides insight into the physics of mergers, through which large scale structures form in the Universe. Velocity estimates within the intracluster medium (ICM) can be obtained via the Sunyaev-Zel'dovich ... More
Planck 2015 results. V. LFI calibrationMay 29 2015Nov 17 2015We present a description of the pipeline used to calibrate the Planck Low Frequency Instrument (LFI) timelines into thermodynamic temperatures for the Planck 2015 data release, covering four years of uninterrupted operations. As in the 2013 data release, ... More
Planck intermediate results. XXXV. Probing the role of the magnetic field in the formation of structure in molecular cloudsFeb 13 2015Sep 08 2015Within ten nearby (d < 450 pc) Gould Belt molecular clouds we evaluate statistically the relative orientation between the magnetic field projected on the plane of sky, inferred from the polarized thermal emission of Galactic dust observed by Planck at ... More
Planck intermediate results. XXXII. The relative orientation between the magnetic field and structures traced by interstellar dustSep 23 2014Mar 31 2015The role of the magnetic field in the formation of the filamentary structures observed in the interstellar medium (ISM) is a debated topic. The Planck all-sky maps of linearly polarized emission from dust at 353GHz provide the required combination of ... More
Probing changes of dust properties along a chain of solar-type prestellar and protostellar cores in Taurus with NIKAJun 26 2017The characterization of dust properties in the interstellar medium (ISM) is key for star formation. Mass estimates are crucial to determine gravitational collapse conditions for the birth of new stellar objects in molecular clouds. However, most of these ... More
Planck intermediate results. XXXIV. The magnetic field structure in the Rosette NebulaJan 05 2015Sep 15 2015Planck has mapped the polarized dust emission over the whole sky, making it possible to trace the Galactic magnetic field structure that pervades the interstellar medium (ISM). We combine polarization data from Planck with rotation measure (RM) observations ... More
Planck intermediate results. XXIII. Galactic plane emission components derived from Planck with ancillary dataJun 19 2014Jun 02 2015Planck data when combined with ancillary data provide a unique opportunity to separate the diffuse emission components of the inner Galaxy. The purpose of the paper is to elucidate the morphology of the various emission components in the strong star-formation ... More
The geometry of the magnetic field in the Central Molecular Zone measured by PILOTJan 18 2019We present the first far infrared (FIR) dust emission polarization map covering the full extent Milky Way's Central molecular zone (CMZ). The data, obtained with the PILOT balloon-borne experiment, covers the Galactic Center region $-2\,^\circ<l<2\,^\circ$, ... More
Non parametric deprojection of NIKA SZ observations: pressure distribution in the Planck-discovered cluster PSZ1 G045.85+57.71Jul 26 2016The determination of the thermodynamic properties of clusters of galaxies at intermediate and high redshift can bring new insights into the formation of large scale structures. It is essential for a robust calibration of the mass-observable scaling relations ... More
Mapping the hot gas temperature in galaxy clusters using X-ray and Sunyaev-Zel'dovich imagingJun 30 2017Jul 21 2017We propose a method to map the temperature distribution of the hot gas in galaxy clusters that uses resolved images of the thermal Sunyaev-Zel'dovich (tSZ) effect in combination with X-ray data. Application to images from the New IRAM KIDs Array (NIKA) ... More
Planck intermediate results. XXIX. All-sky dust modelling with Planck, IRAS, and WISE observationsSep 08 2014Feb 15 2016We present all-sky modelling of the high resolution Planck, IRAS, and WISE infrared (IR) observations using the physical dust model presented by Draine and Li in 2007 (DL). We study the performance and results of this model, and discuss implications for ... More
QUBIC: Exploring the primordial Universe with the Q\&U Bolometric InterferometerNov 30 2018Jan 23 2019In this paper we describe QUBIC, an experiment that will observe the polarized microwave sky with a novel approach, which combines the sensitivity of state-of-the art bolometric detectors with the systematic effects control typical of interferometers. ... More
Polarimetry at millimeter wavelengths with the NIKA camera: calibration and performanceSep 07 2016Magnetic fields, which play a major role in a large number of astrophysical processes from galactic to cosmological scales, can be traced via observations of dust polarization as demonstrated by the Planck satellite results. In particular, low-resolution ... More
Polarimetry at millimeter wavelengths with the NIKA camera: calibration and performanceSep 07 2016Feb 24 2017Magnetic fields, which play a major role in a large number of astrophysical processes from galactic to cosmological scales, can be traced via observations of dust polarization as demonstrated by the Planck satellite results. In particular, low-resolution ... More
Mapping the kinetic Sunyaev-Zel'dovich effect toward MACS J0717.5+3745 with NIKAJun 24 2016Dec 08 2016Measurement of the gas velocity distribution in galaxy clusters provides insight into the physics of mergers, through which large scale structures form in the Universe. Velocity estimates within the intracluster medium (ICM) can be obtained via the Sunyaev-Zel'dovich ... More
High angular resolution SZ observations with NIKA and NIKA2May 31 2016NIKA2 (New IRAM KID Arrays) is a dual band (150 and 260 GHz) imaging camera based on Kinetic Inductance Detectors (KIDs) and designed to work at the IRAM 30 m telescope (Pico Veleta, Spain). Built on the experience of the NIKA prototype, NIKA2 has been ... More
High-resolution tSZ cartography of clusters of galaxies with NIKA at the IRAM 30-m telescopeFeb 25 2016The thermal Sunyaev-Zeldovich effect (tSZ) is a powerful probe to study clusters of galaxies and is complementary with respect to X-ray, lensing or optical observations. Previous arcmin resolution tSZ observations ({\it e.g.} SPT, ACT and Planck) only ... More
Planck pre-launch status: High Frequency Instrument polarization calibrationApr 15 2010The High Frequency Instrument of Planck will map the entire sky in the millimeter and sub-millimeter domain from 100 to 857 GHz with unprecedented sensitivity to polarization ($\Delta P/T_{\tiny cmb} \sim 4\cdot 10^{-6}$) at 100, 143, 217 and 353 GHz. ... More
Non-parametric deprojection of NIKA SZ observations: Pressure distribution in the Planck-discovered cluster PSZ1 G045.85+57.71Jul 26 2016Oct 05 2016The determination of the thermodynamic properties of clusters of galaxies at intermediate and high redshift can bring new insights into the formation of large-scale structures. It is essential for a robust calibration of the mass-observable scaling relations ... More
Pressure distribution of the high-redshift cluster of galaxies CL J1226.9+3332 with NIKAOct 10 2014May 15 2015The thermal Sunyaev-Zel'dovich (tSZ) effect is expected to provide a low scatter mass proxy for galaxy clusters since it is directly proportional to the cluster thermal energy. The tSZ observations have proven to be a powerful tool for detecting and studying ... More
The NIKA2 instrument, a dual-band kilopixel KID array for millimetric astronomyJan 12 2016NIKA2 (New IRAM KID Array 2) is a camera dedicated to millimeter wave astronomy based upon kilopixel arrays of Kinetic Inductance Detectors (KID). The pathfinder instrument, NIKA, has already shown state-of-the-art detector performance. NIKA2 builds upon ... More
High angular resolution Sunyaev-Zel'dovich observations of MACS J1423.8+2404 with NIKA: Multiwavelength analysisOct 22 2015Feb 15 2016The prototype of the NIKA2 camera, NIKA, is an instrument operating at the IRAM 30-m telescope, which can observe simultaneously at 150 and 260GHz. One of the main goals of NIKA2 is to measure the pressure distribution in galaxy clusters at high resolution ... More
First polarised light with the NIKA cameraAug 04 2015Oct 07 2015NIKA is a dual-band camera operating with 315 frequency multiplexed LEKIDs cooled at 100 mK. NIKA is designed to observe the sky in intensity and polarisation at 150 and 260 GHz from the IRAM 30-m telescope. It is a test-bench for the final NIKA2 camera. ... More
Fokker-Planck and Quasilinear CodesJan 13 2005The interaction of radio-frequency waves with a plasma is described by a Fokker-Planck equation with an added quasilinear term. Methods for solving this equation on a computer are discussed.
Numerical Techniques for the Study of Long-Time CorrelationsJan 26 2004In the study of long-time correlations extremely long orbits must be calculated. This may be accomplished much more reliably using fixed-point arithmetic. Use of this arithmetic on the Cray-1 computer is illustrated.