Results for "M. E. Dickinson"

total 247008took 0.18s
Field Galaxy Evolution Since Z~1 from a Sample of QSO Absorption-Selected GalaxiesOct 06 1994We present some of the results of a large survey aimed at establishing the properties of galaxies selected by their having produced detectable Mg~II $\lambda\lambda 2796$, 2803 absorption in the spectra of background QSOs. The present sample covers the ... More
The Noao Newfirm PipelineFeb 09 2009The NOAO NEWFIRM Pipeline produces instrumentally calibrated data products and data quality measurements from all exposures taken with the NOAO Extremely Wide-Field Infrared Imager (NEWFIRM) at the KPNO Mayall 4-meter telescope. We describe the distributed ... More
Galaxy Evolution from QSO Absorption--Selected SamplesSep 23 1994We present results of surveys for high redshift field galaxies selected by their having produced detectable absorption in the spectra of background QSOs. Such surveys, in essence selected by gas cross-section rather than by flux density, are almost completely ... More
A CO emission line from the optical and near-IR undetected submillimeter galaxy GN10Mar 17 2009We report the detection of a CO emission line from the submillimiter galaxy (SMG) GN10 in the GOODS-N field. GN10 lacks any counterpart in extremely deep optical and near-IR imaging obtained with the Hubble Space Telescope and ground-based facilities. ... More
Lyman Break Galaxies at Redshift z~3: Survey Description and Full Data SetMay 20 2003We present the basic data for a large ground-based spectroscopic survey for z~3 ``Lyman break galaxies'' (LBGs), photometrically selected using rest-UV colors from very deep images in 17 high Galactic latitude fields. The total survey covers an area of ... More
Lyman Alpha Imaging of a Proto-Cluster Region at <z>=3.09Oct 07 1999We present very deep imaging observations, through a narrow-band filter tuned to Lyman alpha at <z = 3.09>, of a volume containing a significant over-density of galaxies at this redshift previously discovered in our survey for continuum-selected Lyman ... More
The Rest-Frame Optical Properties of z~3 GalaxiesJul 17 2001We present the results of a near-infrared imaging survey of z~3 Lyman Break Galaxies (LBGs). The survey covers a total of 30 arcmin^2 and includes 118 photometrically selected LBGs with K_s band measurements, 63 of which also have J band measurements, ... More
The Kinematic Connection Between QSO-Absorbing Gas and Galaxies at Intermediate RedshiftJan 21 2002We present complementary data on 5 intermediate redshift (0.44 < z < 0.66) MgII absorbing galaxies, combining high spatial resolution imaging from HST, high--resolution QSO spectroscopy from Keck/HIRES, and galaxy kinematics from intermediate resolution ... More
Searching for massive galaxies at z>=3.5 in GOODS-NorthJan 21 2009Feb 03 2009We constrain the space density and properties of massive galaxy candidates at redshifts of z>=3.5 in the GOODS-N field. By selecting sources in the Spitzer+IRAC bands, a highly stellar mass-complete sample is assembled,including massive galaxies which ... More
Star formation rates and masses of z ~ 2 galaxies from multicolour photometryApr 26 2010Fitting synthetic spectral energy distributions (SED) to the multi-band photometry of galaxies to derive their star formation rates (SFR), stellar masses, ages, etc. requires making a priori assumptions about their star formation histories (SFH). A widely ... More
Dust in the Host Galaxies of SupernovaeSep 13 2005We present Spitzer/MIPS 24 micron observations of 50 supernova host galaxies at 0.1<z<1.7 in the Great Observatories Origins Deep Survey (GOODS) fields. We also discuss the detection of SN host galaxies in SCUBA/850 micron observations of GOODS-N and ... More
An Accounting of the Dust-Obscured Star Formation and Accretion Histories Over the Last ~11~Billion YearsFeb 18 2011(Abridged) We report on an accounting of the star formation and accretion driven energetics of 24um detected sources in GOODS North. For sources having infrared (IR; 8-1000um) luminosities >3x10^12 L_sun when derived by fitting local SEDs to 24um photometry ... More
Vigorous star formation with low efficiency in massive disk galaxies at z=1.5Nov 30 2007We present the first detection of molecular gas cooling CO emission lines from ordinary massive galaxies at z=1.5. Two sources were observed with the IRAM Plateau de Bure Interferometer, selected to lie in the mass-star formation rate correlation at their ... More
The K Band Luminosity Function in Galaxy Clusters to z ~ 1May 12 1999We present $K$-band luminosity functions for galaxies in a heterogeneous sample of 38 clusters at $0.1 < z < 1$. Using infrared-selected galaxy samples which generally reach 2 magnitudes fainter than the characteristic galaxy luminosity $L^*$, we fit ... More
The spatial clustering of mid-IR selected star forming galaxies at z ~ 1 in the GOODS fieldsAug 21 2007Sep 13 2007We present the first spatial clustering measurements of z~1, 24um-selected, star forming galaxies in the Great Observatories Origins Deep Survey (GOODS). The sample under investigation includes 495 objects in GOODS-South and 811 objects in GOODS-North ... More
Evidence for TP-AGB stars in high redshift galaxies, and their effect on deriving stellar population parametersApr 25 2006We explore the effects of stellar population models on estimating star formation histories, ages and masses of high redshift galaxies. The focus is on the Thermally-Pulsing Asymptotic Giant Branch (TP-AGB) phase of stellar evolution, whose treatment is ... More
The B-Band Luminosity Function of Red and Blue Galaxies up to z=3.5Dec 02 2004We have explored the redshift evolution of the luminosity function of red and blue galaxies up to $z=3.5$. This was possible joining a deep I band composite galaxy sample, which includes the spectroscopic K20 sample and the HDFs samples, with the deep ... More
Lyman Break Galaxies in the VLT/FORS2 spectroscopic campaign in the GOODS-S fieldDec 07 2006We present initial results from our ongoing campaign of spectroscopic identifications of Lyman--break galaxies (LBGs) at z ~ 4, 5 and 6 with FORS2 at the ESO VLT. The sample of LBGs is selected from the HST/ACS images in the GOODS southern field (CDF--S), ... More
Dissecting the stellar mass-SFR correlation in z=1 star-forming disk galaxiesJun 08 2012Using a mass-limited sample of 24um-detected, star-forming galaxies at 0.5<z<1.3, we study the mass-star formation rate (SFR) correlation and its tightness. The correlation is well defined (sigma=0.28dex) for disk galaxies (n_sersic<1.5), while more bulge-dominated ... More
The GOODS-North Radio Galaxies: On the Origin of the Radio EmissionMar 16 2006We report on a preliminary study concerning the origin of radio emission within radio galaxies at L(1.4GHz)>1E24 W/Hz in the GOODS-N field. In the local universe, Condon et al. (2002) and Yun et al. (2001) have shown that in galaxies with radio luminosities ... More
Low, Milky-Way like, Molecular Gas Excitation of Massive Disk Galaxies at z~1.5May 22 2009We present evidence for Milky-Way-like, low-excitation molecular gas reservoirs in near-IR selected massive galaxies at z~1.5, based on IRAM Plateau de Bure Interferometer CO[3-2] and NRAO Very Large Array CO[1-0] line observations for two galaxies that ... More
Balancing the Energy Budget between Star-Formation and AGN in High Redshift Infrared Luminous GalaxiesDec 15 2008Apr 14 2009(abridged) We present deep Spitzer mid-infrared spectroscopy, along with 16, 24, 70, and 850um photometry, for 22 galaxies located in GOODS-N. The sample spans a redshift range of 0.6 < z < 2.6, 24um flux densities between ~0.2-1.2 mJy, and consists of ... More
Multiaperture $UBVRIzJHK$ Photometry of Galaxies in the Coma ClusterNov 29 2006We present a set of $UBVRIzJHK_s$ photometry for 745 $J+H$ band selected objects in a $22.5' \times 29.2'$ region centered on the core of the Coma cluster. This includes 516 galaxies and is at least 80% complete to H=16, with a spectroscopically complete ... More
Two bright submillimeter galaxies in a z=4.05 proto-cluster in GOODS-North, and accurate radio-infrared photometric redshiftsOct 17 2008Dec 18 2008We present the serendipitous discovery of z=4.05 molecular gas CO emission lines with the IRAM Plateau de Bure interferometer coincident with GN20 and GN20.2, two luminous submillimeter galaxies (SMGs) in the Great Observatories Origins Deep Survey North ... More
Balancing the Energy Budget: Star-Formation versus AGN in High Redshift Infrared Luminous GalaxiesMay 04 2010We present deep {\it Spitzer} mid-infrared spectroscopy, along with 16, 24, 70, and 850\,$\micron$\ photometry, for 22 galaxies located in the Great Observatories Origins Deep Survey-North (GOODS-N) field. The sample spans a redshift range of $0.6\la ... More
Deep Halpha imagery of the Eridanus shellsAug 14 2000A deep \ha image of interlocking filamentary arcs of nebulosity has been obtained with a wide-field ($\approx$ 30\degree diameter) narrow-band filter camera combined with a CCD as a detector. The resultant mosaic of images, extending to a galactic latitude ... More
Observations of Free-Free and Anomalous Microwave Emission from LDN 1622 with the 100 m Green Bank TelescopeJan 07 2015LDN 1622 has previously been identified as a possible strong source of dust-correlated Anomalous Microwave Emission (AME). Previous observations were limited by resolution meaning that the radio emission could not be compared with current generation high-resolution ... More
New constraints on the Polarization of Anomalous Microwave Emission in nearby molecular cloudsAug 01 2011Aug 18 2011Anomalous Microwave Emission (AME) has been previously studied in two well-known molecular clouds and is thought to be due to electric dipole radiation from small spinning dust grains. It is important to measure the polarization properties of this radiation ... More
Simultaneous H.E.S.S. and RXTE observations of the microquasars GRS 1915+105, Circinus X-1 and V4641 SgrSep 10 2015Microquasars, Galactic binary systems showing extended and variable radio emission, are potential gamma-ray emitters. Indications of gamma-ray transient episodes have been reported in at least two systems, Cyg X-1 and Cyg X-3. The identification of additional ... More
Deep U band and R imaging of GOODS-South: Observations,data reduction and first resultsJun 23 2009Jun 29 2009We present deep imaging in the {\em U} band covering an area of 630 arcmin$^{2}$ centered on the southern field of the Great Observatories Origins Deep Survey (GOODS). The data were obtained with the VIMOS instrument at the ESO Very Large Telescope. The ... More
Different star formation laws for disks versus starbursts at low and high redshiftsMar 19 2010We present evidence that 'bona fide' disks and starburst systems occupy distinct regions in the gas mass versus star formation (SF) rate plane, both for the integrated quantities and for the respective surface densities. This result is based on CO observations ... More
Spectroscopic confirmation of z~7 LBGs: probing the earliest galaxies and the epoch of reionizationJul 07 2011We present the final results from our ultra-deep spectroscopic campaign with FORS2 at the ESO/VLT for the confirmation of z~7 "z--band dropout" candidates selected from our VLT/Hawk-I imaging survey over three independent fields. In particular we report ... More
The lack of intense Lyman~alpha in ultradeep spectra of z=7 candidates in GOODS-S: imprint of reionization?Oct 13 2010We present ultradeep optical spectroscopy obtained with FORS2 on VLT of seven Lyman-break galaxy (LBG) candidates at z>6.5 selected in the GOODS-S field from Hawk-I/VLT and WFC3/HST imaging. For one galaxy we detect a low significance emission line (S/N< ... More
Massive Ellipticals at High Redshift: NICMOS Imaging of Z~1 Radio GalaxiesNov 20 2002We present deep, continuum images of eleven high-redshift (0.811 < z < 1.875) 3CR radio galaxies observed with NICMOS. Our images probe the rest-frame optical light where stars are expected to dominate the galaxy luminosity. The rest-frame UV light of ... More
Very High Gas Fractions and Extended Gas Reservoirs in z=1.5 Disk GalaxiesNov 14 2009Feb 22 2010We present evidence for very high gas fractions and extended molecular gas reservoirs in normal, near-infrared selected (BzK) galaxies at z~1.5, based on multi-configuration CO[2-1] observations obtained at the IRAM PdBI. Six of the six galaxies observed ... More
Extracting HI cosmological signal with Generalized Needlet Internal Linear CombinationSep 02 2015Jan 05 2016HI intensity mapping is a new observational technique to map fluctuations in the large-scale structure of matter using the 21 cm emission line of atomic hydrogen (HI). Sensitive radio surveys have the potential to detect Baryon Acoustic Oscillations (BAO) ... More
The unusual NIV]-emitter galaxy GDS J033218.92-275302.7: star formation or AGN-driven winds from a massive galaxy at z=5.56Dec 15 2009Jul 23 2010Aims: We investigate the nature of the source GDS J033218.92-275302.7at redshift ~ 5.56. Methods: The SED of the source is well sampled by 16 bands photometry, from UV-optical, near infrared and mid-infrared (MID-IR).The detection of signal in the MID-IR ... More
The Molecular Gas Content of z = 3 Lyman Break Galaxies; Evidence of a non Evolving Gas Fraction in Main Sequence Galaxies at z > 2Sep 07 2012Sep 10 2012We present observations of the CO[3-2] emission towards two massive and infrared luminous Lyman Break Galaxies at z = 3.21 and z = 2.92, using the IRAM Plateau de Bure Interferometer, placing first constraints on the molecular gas masses (Mgas) of non-lensed ... More
Reliable Identification of Compton-thick Quasars at z~2: Spitzer Mid-IR spectroscopy of HDF-oMD49Mar 05 2008Jul 15 2008Many models that seek to explain the origin of the unresolved X-ray background predict that Compton-thick Active Galactic Nuclei (AGNs) are ubiquitious at high redshift. However, few distant Compton-thick AGNs have been reliably identified to date. Here ... More
GOODS-Herschel:dust attenuation properties of UV selected high redshift galaxiesJul 15 2012Jul 19 2012We study dust attenuation at UV wavelengths at high redshift, where the UV is redshifted to the observed visible. In particular, we search for a UV bump and related implications for dust attenuation determinations. We use data in the CDFS, obtained in ... More
The red sequence at birth in the galaxy cluster ClJ1449+0856 at z=2Nov 23 2016We use HST/WFC3 imaging to study the red population in the IR-selected, X-ray detected, low-mass cluster Cl J1449+0856 at z=2, one of the few bona-fide established clusters discovered at this redshift, and likely a typical progenitor of an average massive ... More
A mature cluster with X-ray emission at z=2.07Nov 08 2010Dec 10 2010We report evidence of a fully established galaxy cluster at z=2.07, consisting of a ~20sigma overdensity of red, compact spheroidal galaxies spatially coinciding with extended X-ray emission detected with XMM-Newton. We use VLT VIMOS and FORS2 spectra ... More
Mapping the Dark Matter From UV Light at High Redshift: An Empirical Approach to Understand Galaxy StatisticsAug 13 2008Apr 05 2009We present a simple formalism to interpret two galaxy statistics, the UV luminosity function and two-point correlation functions for star-forming galaxies at z~4, 5, 6 in the context of LCDM cosmology. Both statistics are the result of how star formation ... More
The Uuniversity of Durham Mark 6 Gamma Ray TelescopeApr 21 1998The design, construction and operation of the University of Durham ground-based gamma ray telescope is discussed. The telescope has been designed to detect gamma rays in the < 200 GeV region and to achieve good discrimination between gamma ray and hadron ... More
Galaxy evolution in overdense environments at high redshift: passive early-type galaxies in a cluster at redshift 2May 15 2013We present a study of galaxy populations in the central region of the IRAC-selected, X-ray detected galaxy cluster Cl J1449+0856 at z=2. Based on a sample of spectroscopic and photometric cluster members, we investigate stellar populations and morphological ... More
Bayesian foreground analysis with CMB dataApr 07 2006The quality of CMB observations has improved dramatically in the last few years, and will continue to do so in the coming decade. Over a wide range of angular scales, the uncertainty due to instrumental noise is now small compared to the cosmic variance. ... More
X-ray observations of highly obscured 9.7 micron sources: an efficient method for selecting Compton-thick AGN ?May 07 2011May 25 2011Spitzer/IRS has revealed many sources with very deep Si features at 9.7micron (tau>1). We set out to investigate whether a strong Si absorption feature is a good indicator for the presence of a heavily obscured AGN. We compile X-ray spectroscopic observations ... More
The Nature of Faint 24 micron Sources Seen in Spitzer Observations of ELAIS-N1Jun 17 2004The Spitzer Space Telescope has undertaken the deepest ever observations of the 24 micron sky in the ELAIS-N1 field as part of GOODS Science Verification observations. We present the shape of the 24 micron source counts in the flux range 20-1000 microJy, ... More
Spectroscopic Confirmation of a Population of Normal Star-Forming Galaxies at Redshifts z>3Feb 05 1996We report the discovery of a substantial population of star--forming galaxies at $3.0 \simlt z \simlt 3.5$. These galaxies have been selected using color criteria sensitive to the presence of a Lyman continuum break superposed on an otherwise very blue ... More
Deep Observations of Lyman Break GalaxiesJan 16 2001We summarise the main results of recent work on the Lyman break galaxy population which takes advantage of newly commissioned instrumentation on the VLT and Keck telescopes to push the detection of these objects to new wavelengths and more sensitive limits. ... More
Tests of star formation metrics in the low metallicity galaxy NGC 5253 using ALMA observations of H30$α$ line emissionJul 19 2017We use Atacama Large Millimeter/submillimeter Array (ALMA) observations of H30$\alpha$ (231.90 GHz) emission from the low metallicity dwarf galaxy NGC 5253 to measure the star formation rate (SFR) within the galaxy and to test the reliability of SFRs ... More
The Evolving Interstellar Medium of Star Forming Galaxies Since z=2 as Probed by Their Infrared Spectral Energy DistributionsOct 03 2012Oct 04 2012Using data from the mid-infrared to millimeter wavelengths for individual galaxies and for stacked ensembles at 0.5<z<2, we derive robust estimates of dust masses (Mdust) for main sequence (MS) galaxies, which obey a tight correlation between star formation ... More
The reversal of the star formation-density relation in the distant universeMar 26 2007Apr 06 2007We study the relationship between the local environment of galaxies and their star formation rate (SFR) in the Great Observatories Origins Deep Survey, GOODS, at z~1, from ultradeep imaging at 24 microns with the MIPS camera onboard Spitzer. We show that ... More
The C-Band All-Sky Survey (C-BASS): Digital backend for the northern surveyNov 15 2018Jan 29 2019The C-Band All-Sky Survey (C-BASS) is an all-sky full-polarization survey at a frequency of 5 GHz, designed to provide data complementary to the all-sky surveys of WMAP and Planck and future CMB B-mode polarization imaging surveys. We describe the design ... More
Galactic foreground contributions to the WMAP5 mapsJul 31 2011We compute the cross correlation of the intensity and polarisation from the 5-year WMAP data in different sky-regions with respect to template maps for synchrotron, dust, and free-free emission. We derive the frequency dependence and polarisation fraction ... More
Synchrotron radiation from molecular cloudsDec 15 2014Observations of the properties of dense molecular clouds are critical in understanding the process of star-formation. One of the most important, but least understood, is the role of the magnetic fields. We discuss the possibility of using high-resolution, ... More
The Rest Frame Optical Spectra of Lyman Break Galaxies: Star Formation, Extinction, Abundances, and KinematicsFeb 27 2001We present the first results of a spectroscopic survey of Lyman break galaxies in the near-infrared aimed at detecting the emission lines of [O II], [O III], and Hbeta from the H II regions of star forming galaxies at z = 3. From observations of 19 objects ... More
Multi-wavelength constraints on cosmic-ray leptons in the GalaxyJul 21 2015Cosmic rays (CRs) interact with the gas, the radiation field and the magnetic field in the Milky Way, producing diffuse emission from radio to gamma rays. Observations of this diffuse emission and comparison with detailed predictions are powerful tools ... More
Simulated Effects of 1/f Noise on an SKA Intensity Mapping SurveyJun 30 2016It has been proposed recently that the SKA1-MID could be used to conduct an HI intensity mapping survey that could rival upcoming Stage IV dark energy surveys. However, measuring the weak HI signal is expected to be very challenging due to contaminations ... More
A Massive Cluster of Galaxies at z = 0.996Apr 10 1997We report the identification of a cluster of galaxies around the high-redshift radio galaxy 3CR184 at z = 0.996. The identification is supported by an excess of galaxies observed in projection in I band images (both in ground-based and HST data), a peak ... More
Clustering around the radio-galaxy MRC0316-257 at z=3.14Sep 03 1996We report here the spectroscopic identification of galaxies in the neighborhood of the radio-galaxy MRC0316-257, at a redshift $z\sim3.14$. Candidate cluster galaxies were selected from deep V and I images combined with narrow band imaging at the wavelength ... More
ALMA and Herschel reveal that X-ray selected AGN and main-sequence galaxies have different star formation rate distributionsJun 17 2015Jul 29 2015Using deep Herschel and ALMA observations, we investigate the star formation rate (SFR) distributions of X-ray selected AGN host galaxies at 0.5<z<1.5 and 1.5<z<4, comparing them to that of normal, star-forming (i.e., "main-sequence", or MS) galaxies. ... More
Multiwavelength study of massive galaxies at z~2. I. Star formation and galaxy growthMay 19 2007Jul 24 2007Examining a sample of massive galaxies at 1.4<z<2.5 with K_{Vega}<22 from the Great Observatories Origins Deep Survey, we compare photometry from Spitzer at mid- and far-IR, to submillimeter, radio and rest-frame ultraviolet wavelengths, to test the agreement ... More
The Great Observatories Origins Deep Survey. VLT/VIMOS Spectroscopy in the GOODS-South FieldFeb 20 2008We present the first results of the VIsible Multiobject Spectrograph (VIMOS) ESO/GOODS program of spectroscopy of faint galaxies in the Chandra Deep Field South (CDF-S). The program complements the FORS2 ESO/GOODS campaign. 3312 spectra have been obtained ... More
GOODS-Herschel~: Gas-to-dust mass ratios and CO-to-H_2 conversion factors in normal and starbursting galaxies at high-zSep 06 2011We explore the gas-to-dust mass ratio (G/D) and the CO luminosity-to-Mgas conversion factor (a_co) of two well studied galaxies in the GOODS-N field, that are expected to have different star forming modes, the starburst GN20 at z=4.05 and the normal star-forming ... More
A Survey of Atomic Carbon [C I] in High-redshift Main-Sequence GalaxiesOct 25 2018We present the first results of an ALMA survey of the lower fine structure line of atomic carbon [C I]$(^3P_1\,-\,^{3}P_0)$ in far infrared-selected galaxies on the main sequence at $z\sim1.2$ in the COSMOS field. We compare our sample with a comprehensive ... More
Faint AGNs at z>4 in the CANDELS GOODS-S field: looking for contributors to the reionization of the UniverseFeb 09 2015Feb 18 2015In order to derive the AGN contribution to the cosmological ionizing emissivity we have selected faint AGN candidates at $z>4$ in the CANDELS GOODS-South field which is one of the deepest fields with extensive multiwavelength coverage from Chandra, HST, ... More
The SIMPLE survey: observations, reduction, and catalogNov 11 2010We present the Spitzer IRAC/MUSYC Public Legacy Survey in the Extended CDF-South (SIMPLE), which consists of deep IRAC observations covering the ~1,600 arcmin^2 area surrounding GOODS-S. The limiting magnitudes of the SIMPLE IRAC mosaics typically are ... More
QSO Absorbing Galaxies at z<~1: Deep Imaging and Spectroscopy in the Field of 3C 336Oct 28 1996We present very deep WFPC2 images and FOS spectroscopy from the Hubble Space Telescope (HST) together with numerous supporting ground-based observations of the field of the quasar 3C 336 ($z_{em}=0.927$). The observations are designed to investigate the ... More
X-ray Properties of Lyman Break Galaxies in the Great Observatories Origins Deep SurveySep 24 2004We constrain the X-ray emission properties of Lyman break galaxies (LBGs) at z ~ 3-6 using the 2 Ms Chandra Deep Field-North and 1 Ms Chandra Deep Field-South. Large samples of LBGs were discovered using HST as part of the Great Observatories Origins ... More
CANDELSz7: a large spectroscopic survey of CANDELS galaxies in the reionization epochAug 06 2018We present the results of CANDELSz7, an ESO large program aimed at confirming spectroscopically a homogeneous sample of z~6 and z~7 star forming galaxies. The candidates were selected in the GOODS-South, UDS and COSMOS fields using the official CANDELS ... More
Spectroscopic Observations of Lyman-Break Galaxies at Redshift ~ 4, 5 and 6 in the GOODS-South FieldJan 27 2009We report on observations of Lyman-break galaxies (LBGs) selected from the Great Observatories Origins Deep Survey at mean redshift z~4, 5 and 6, obtained with FORS2 spectrograph at the ESO-VLT.This program has yielded spectroscopic identifications for ... More
Centaurus X-3 - A Source of High Energy Gamma RaysFeb 26 1998Centaurus X-3 is a well-studied high-mass accreting X-ray binary and a variable source of high energy gamma rays with energies from 100 MeV to 1 TeV. Previous results have suggested that the origin of the gamma rays is not the immediate vicinity of the ... More
A refined model for spinning dust radiationDec 15 2008Aug 03 2009We present a comprehensive treatment of the spectrum of electric dipole emission from spinning dust grains, updating the commonly used model of Draine and Lazarian. Grain angular velocity distributions are computed using the Fokker-Planck equation; we ... More
Spectroscopic confirmation of two Lyman break galaxies at redshift beyond 7Nov 24 2010Feb 23 2011We report the spectroscopic confirmation of two Lyman break galaxies at redshift > 7. The galaxies were observed as part of an ultra-deep spectroscopic campaign with FORS2 at the ESO/VLT for the confirmation of z~7 ``z--band dropout'' candidates selected ... More
The Great Observatories Origins Deep Survey: Constraints on the Lyman Continuum Escape Fraction Distribution of Lyman--Break Galaxies at 3.4<z<4.5Sep 06 2010We use ultra-deep ultraviolet VLT/VIMOS intermediate-band and VLT/FORS1 narrow-band imaging in the GOODS Southern field to derive limits on the distribution of the escape fraction (f_esc) of ionizing radiation for L >~ L*(z=3) Lyman Break Galaxies (LBGs) ... More
The Great Observatories Origins Deep Survey - VLT/FORS2 Spectroscopy in the GOODS-South FieldJun 25 2004We present the first results of the ESO/GOODS program of spectroscopy of faint galaxies in the Chandra Deep Field South (CDF-S). 399 spectra of 303 unique targets have been obtained in service mode with the FORS2 spectrograph at the ESO/VLT, providing ... More
Dust and Gas in Star Forming Galaxies at z~3 - Extending Galaxy Uniformity to 11.5 Billion YearsMay 17 2017We present millimetre dust emission measurements of two Lyman Break Galaxies at z~3 and construct for the first time fully sampled infrared spectral energy distributions (SEDs), from mid-IR to the Rayleigh-Jeans tail, of individually detected, unlensed, ... More
A Deep, Wide Field, Optical, and Near Infrared Catalog of a Large Area around the Hubble Deep Field NorthDec 29 2003We have conducted a deep multi-color imaging survey of 0.2 degrees^2 centered on the Hubble Deep Field North (HDF-N). We shall refer to this region as the Hawaii-HDF-N. Deep data were collected in U, B, V, R, I, and z' bands over the central 0.2 degrees^2 ... More
Imaging the molecular gas in a submm galaxy at z = 4.05: cold mode accretion or a major merger?Feb 22 2010We present a high resolution (down to 0.18"), multi-transition imaging study of the molecular gas in the z = 4.05 submillimeter galaxy GN20. GN20 is one of the most luminous starburst galaxy known at z > 4, and is a member of a rich proto-cluster of galaxies ... More
EVOLUTION OF IR-SELECTED GALAXIES IN Z~0.4 CLUSTERSApr 04 1995Wide-field optical and near--IR ($JHK$) imaging is presented for two rich galaxy clusters: Abell~370 at $z=0.374$ and Abell~851 (Cl0939+47) at $z=0.407$. Galaxy catalogs selected from the near--IR images are 90\% complete to approximately 1.5 mag below ... More
Evolution in the Color-Magnitude Relation of Early-Type Galaxies in Clusters of Galaxies at z~=1Mar 16 2005Mar 17 2005We present a study of the color evolution of elliptical and S0 galaxies in six clusters of galaxies inside the redshift range 0.78 < z < 1.27. For each cluster, we used imaging from the Hubble Space Telescope to determine morphological types by both an ... More
A New Diagnostic of Active Galactic Nuclei: Revealing Highly-Absorbed Systems at Redshift>0.3May 16 2011We introduce the Mass-Excitation (MEx) diagnostic to identify active galactic nuclei (AGN) in galaxies at intermediate redshift. In the absence of near-infrared spectroscopy, necessary to use traditional nebular line diagrams at z>0.4, we demonstrate ... More
COLDz: Karl G. Jansky Very Large Array discovery of a gas-rich galaxy in COSMOSDec 03 2014The broad spectral bandwidth at mm and cm-wavelengths provided by the recent upgrades to the Karl G. Jansky Very Large Array (VLA) has made it possible to conduct unbiased searches for molecular CO line emission at redshifts, z > 1.31. We present the ... More
CO excitation of normal star forming galaxies out to z=1.5 as regulated by the properties of their interstellar mediumSep 29 2014Jan 18 2015We investigate the CO excitation of normal star forming disk galaxies at z=1.5 using IRAM PdBI observations of the CO[2-1], CO[3-2] and CO[5-4] transitions for 4 galaxies, including VLA observations of CO[1-0] for 3 of them, with the aim of constraining ... More
The population of BzK selected ULIRGs at z~2Jul 21 2005We investigate the multi-wavelength emission of BzK selected star forming galaxies at z~2 in the Great Observatories Origins Deep Survey (GOODS) North region. Most (82%) of the sources are individually detected at 24um in the Spitzer MIPS imaging, and ... More
TeV gamma rays from PSR 1706-44Apr 22 1998Observations made with the University of Durham Mark 6 atmospheric Cerenkov telescope confirm that PSR B1706-44 is a very high energy gamma-ray emitter. There is no indication from our dataset that the very high energy gamma-rays are pulsed, in contrast ... More
The distribution of metals in hot DA white dwarfsJan 13 2012The importance to stellar evolution of understanding the metal abundances in hot white dwarfs is well known. Previous work has found the hot DA white dwarfs REJ 1032+532, REJ 1614-085 and GD 659 to have highly abundant, stratified photospheric nitrogen, ... More
The z=0.8596 Damped Lyman Alpha Absorbing Galaxy Toward PKS 0454+039Dec 27 1994Dec 29 1994We present {\it Hubble Space Telescope} and ground--based data on the $z_{abs}=0.8596$ metal line absorption system along the line of sight to PKS 0454+0356. The system is a moderate redshift damped Lyman alpha system, with ${\rm N(HI)}=(5.7\pm0.3)\times10^{20}$~cm$^{-2}$ ... More
The Great Observatories Origins Deep Survey - VLT/VIMOS Spectroscopy in the GOODS-South Field: Part IIJan 07 2010We present the full data set of the VIMOS spectroscopic campaign of the ESO/GOODS program in the CDFS, which complements the FORS2 ESO/GOODS spectroscopic campaign. The GOODS/VIMOS spectroscopic campaign is structured in two separate surveys using two ... More
Evolution of Disk Galaxies in the GOODS-South Field: Number Densities and Size DistributionJan 22 2004Jan 26 2004We examine the evolution of the sizes and number densities of disk galaxies using the high resolution images obtained by the Great Observatories Origins Deep Survey (GOODS) with the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST). ... More
GMASS Ultradeep Spectroscopy of Galaxies at 1.4<z<2. II. Superdense passive galaxies: how did they form and evolve ?Jan 08 2008We combine ultradeep optical spectroscopy from the GMASS project ("Galaxy Mass Assembly ultradeep Spectroscopic Survey") with GOODS multi-band photometry and HST imaging to study a sample of passive galaxiesat 1.39<z<1.99 selected at 4.5 microns. A stacked ... More
GMASS ultradeep spectroscopy of galaxies at z ~ 2 - VII. Star formation, extinction, and gas outflows from UV spectraNov 18 2011We use rest-frame UV spectroscopy to investigate the properties related to large-scale gas outflows, and to the dust extinction and star-formation rates of a sample of z ~ 2 star-forming galaxies from the Galaxy Mass Assembly ultradeep Spectroscopic Survey ... More
GMASS Ultradeep Spectroscopy of Galaxies at z~2. III: The emergence of the color bimodality at z~2Apr 07 2008The aim of this work is to study the evolution of the rest frame color distribution of galaxies with the redshift, in particular in the critical interval 1.4<z<3. We combine ultradeep spectroscopy from the GMASS project (Galaxy Mass Assembly ultradeep ... More
Witnessing the assembly at z=1.6 of a galaxy cluster (GMASS ultradeep spectroscopy of galaxies at z~2 - V)Jun 24 2009We present a study of a galaxy overdensity at z=1.6, Cl 0332-2742, uncovered in the Galaxy Mass Assembly ultra-deep Spectroscopic Survey (GMASS). We conservatively estimate the overdensity in redshift space for the spike, containing 42 galaxies at z=1.6, ... More
GMASS, Unveiling Distant Massive Galaxies with SpitzerApr 06 2006One of the main questions of galaxy formation is how and when galaxies assembled their mass. Observations suggest that most mass assembly and star formation occured at 1 < z < 3. However, in the same redshift range, fully assembled old and massive galaxies ... More
Color-selected galaxies at z~6 in the Great Observatories Origins Deep SurveySep 02 2003We report early results on galaxies at z~6, selected from Hubble Space Telescope imaging for the Great Observatories Origins Deep Survey. Spectroscopy of one object with the Advanced Camera for Surveys grism and from the Keck and VLT observatories a shows ... More
GMASS Ultradeep Spectroscopy of Galaxies at redshift z~2. I. The stellar metallicityJan 08 2008Context: Galaxy metallicities have been measured to redshift z~2 by gas-phase oxygen abundances of the interstellar medium using the R23 and N2 methods. Galaxy stellar metallicities provide crucial data for chemical evolution models but have not been ... More
The LABOCA survey of the Extended Chandra Deep Field South - radio and mid-infrared counterparts to submillimetre galaxiesDec 01 2010We present radio and infrared (3.6-24um) counterparts to submillimetre galaxies (SMGs) detected in the Extended Chandra Deep Field South with the LABOCA 870-um bolometer camera on the 12-m Atacama Pathfinder Experiment. Using the Very Large Array at 1.4GHz ... More
GMASS ultradeep spectroscopy of galaxies at z ~ 2. IV. The variety of dust populationsMar 24 2009Apr 24 2009The properties of dust attenuation at rest-frame UV wavelengths are inferred from very high-quality FORS2 spectra of 78 galaxies from the GMASS survey at 1<z<2.5. These objects complement a previously investigated sample of 108 UV-luminous galaxies at ... More