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Theoretical foundations of the reduced relativistic gas in the cosmological perturbed contextApr 22 2019The Reduced Relativistic Gas (RRG) is a simplified version of the ideal relativistic gas, which assumes that all particles have the same momentum magnitude. Although this is a very idealized situation, the resulting model preserves the phenomenology of ... More
The Hyper Suprime-Cam SSP Transient Survey in COSMOS: OverviewApr 22 2019We present an overview of a deep transient survey of the COSMOS field with the Subaru Hyper Suprime-Cam (HSC). The survey was performed for the 1.77 deg$^2$ ultra-deep layer and 5.78 deg$^2$ deep layer in the Subaru Strategic Program over 6- and 4-month ... More
First astrophysical detection of the helium hydride ion (HeH$^+$)Apr 21 2019During the dawn of chemistry when the temperature of the young Universe had fallen below $\sim$4000 K, the ions of the light elements produced in Big Bang nucleosynthesis recombined in reverse order of their ionization potential. With its higher ionization ... More
Disentangling nature from nurture: tracing the origin of seed black holesApr 19 2019The origin and properties of black hole seeds that grow to produce the detected population of supermassive black holes are unconstrained at present. Despite the existence of several potentially feasible channels for the production of initial seeds in ... More
DarkHistory: A code package for calculating modified cosmic ionization and thermal histories with dark matter and other exotic energy injectionsApr 19 2019We present a new public Python package, DarkHistory, for computing the effects of dark matter annihilation and decay on the temperature and ionization history of the early universe. DarkHistory simultaneously solves for the evolution of the free electron ... More
Ultra Light Boson Dark Matter and Event Horizon Telescope Observations of M87*Apr 19 2019The initial data from the Event Horizon Telescope (EHT) on M87$^*$, the supermassive black hole at the center of the M87 galaxy, provide direct observational information on its mass, spin, and accretion disk properties. A combination of the EHT data and ... More
Secondary CMB temperature anisotropies from magnetic reheatingApr 19 2019Spatially fluctuating primordial magnetic fields~(PMFs) inhomogeneously reheat the Universe when they dissipate deep inside the horizon before recombination. Such an entropy production turns into the additional photon temperature perturbations, in particular, ... More
Gravitational probes of ultra-light axionsApr 18 2019The axion is a hypothetical, well-motivated dark-matter particle whose existence would explain the lack of charge-parity violation in the strong interaction. In addition to this original motivation, an `axiverse' of ultra-light axions (ULAs) with masses ... More
The Supersonic Project: Shining Light on SIGOs - a New Formation Channel for Globular ClustersApr 18 2019Supersonically induced gas objects (SIGOs) with little to no dark matter component are predicted to exist in patches of the Universe with non-negligible relative velocity between baryons and the dark matter at the time of recombination. Using {\sc arepo} ... More
Axion-Dilaton Destabilization and the Hubble TensionApr 18 2019The discrepancy in measurements of the Hubble constant indicates new physics in dark energy, dark matter, or both. Drawing inspiration from string theory, where axions interact with the other moduli fields, including the dilaton, here we demonstrate that ... More
Redshift-weighted constraints on primordial non-Gaussianity from the clustering of the eBOSS DR14 quasars in Fourier spaceApr 18 2019We present constraints on local primordial non-Gaussianity (PNG), parametrized through $f^{\rm loc}_{\rm NL}$, using the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey Data Release 14 quasar sample. We measure and analyze ... More
Integral constraints in spectroscopic surveysApr 18 2019Current clustering analyses of galaxy surveys rely on the knowledge of the survey selection function. Density fluctuations are estimated by comparing the galaxy density field to a random synthetic catalogue accounting for the survey density and geometry. ... More
Vacuum Decay in Real Time and Imaginary Time FormalismsApr 18 2019We analyze vacuum tunneling in quantum field theory in a general formalism by using the Wigner representation. In the standard instanton formalism, one usually approximates the initial false vacuum state by an eigenstate of the field operator, imposes ... More
Dark Matter Strikes Back at the Galactic CenterApr 17 2019Statistical evidence has previously suggested that the Galactic Center GeV Excess (GCE) originates largely from point sources, and not from annihilating dark matter. We examine the impact of unmodeled source populations on identifying the true origin ... More
Probing 21cm cosmology and radiative neutrino decaysApr 17 2019Here we discuss the recent EDGES observation of a excess in its radio profile and how it can be used to constrain radiative neutrino decays.
A new perspective on galactic dynamicsApr 17 2019We derive the radial acceleration of stars in galaxies by using basic features of thermodynamics, statistical mechanics and general relativity. We assume that the "dark" component of the radial acceleration is originated from the reaction of dark energy ... More
A new kind of cyclic universeApr 16 2019Combining intervals of ekpyrotic (ultra-slow) contraction with a (non-singular) classical bounce naturally leads to a novel cyclic theory of the universe in which the Hubble parameter, energy density and temperature oscillate periodically, but the scale ... More
TASI lectures on dark matter models and direct detectionApr 16 2019These lectures provide an introduction to models and direct detection of dark matter. We summarize the general features and motivations for candidates in the full dark matter mass range, and then restrict to the keV-TeV mass window. Candidates in this ... More
Weak lensing in the Horizon-AGN simulation lightcone. Small scale baryonic effectsApr 16 2019Context. Accurate model predictions including the physics of baryons are required to make the most of the upcoming large cosmological surveys devoted to gravitational lensing. The advent of hydrodynamical cosmological simulations enables such predictions ... More
Consistency of local and astrophysical tests of the stability of fundamental constantsApr 16 2019Tests of the stability of nature's fundamental constants are one of the cornerstones of the ongoing search for the new physics which is required to explain the recent acceleration of the universe. The two main settings for these tests are high-resolution ... More
Observational prospects for gravitational waves from hidden or dark chiral phase transitionsApr 16 2019We study the gravitational wave (GW) signature of first-order chiral phase transitions ($\chi$PT) in strongly interacting hidden or dark sectors. We do so using several effective models in order to reliably capture the relevant non-perturbative dynamics. ... More
Cosmological constraints from Planck galaxy clusters with CMB lensing mass bias calibrationApr 16 2019We present a new cosmological analysis of the galaxy clusters in the Planck MMF3 cosmology sample with a cosmic microwave background (CMB) lensing calibration of the cluster masses. As demonstrated by Planck, galaxy clusters detected via the Sunyaev-Zel'dovich ... More
Velocity-induced Acoustic Oscillations at Cosmic DawnApr 16 2019The redshifted 21-cm line of hydrogen holds great potential for the study of cosmology, as it can probe otherwise unobservable cosmic epochs. In particular, measurements of the 21-cm power spectrum during cosmic dawn---the era when the first stars were ... More
Cosmological constant: relaxation vs multiverseApr 16 2019We consider a scalar field with a bottom-less potential, such as $g^3 \phi$, finding that cosmologies unavoidably end up with a crunch, late enough to be compatible with observations if $g \lesssim 1.2 H_0^{2/3} M_{\rm Pl}^{1/3}$. If rebounces avoid singularities, ... More
Nonlinear Dynamics of the Cold Atom Analog False VacuumApr 16 2019We investigate the nonlinear dynamics of cold atom systems that can in principle serve as quantum simulators of false vacuum decay. The analog false vacuum manifests as a metastable vacuum state for the relative phase in a two-species Bose-Einstein condensate ... More
Probing Boson Stars with Extreme Mass Ratio InspiralsApr 16 2019We propose to use gravitational waves from extreme mass ratio inspirals (EMRI), composed of a boson star and a supermassive black hole in the center of galaxies, as a new method to search for boson stars. Gravitational waves from EMRI have the advantage ... More
Imprint of a scalar era on the primordial spectrum of gravitational wavesApr 16 2019Upcoming searches for the stochastic background of inflationary gravitational waves (GWs) offer the exciting possibility to probe the evolution of our Universe prior to Big Bang nucleosynthesis. In this spirit, we explore the sensitivity of future GW ... More
A Standard Ruler at Cosmic DawnApr 16 2019The matter in our Universe comes in two flavors: dark and baryonic. Of these, only the latter couples to photons, giving rise to the well-known baryon acoustic oscillations (BAOs) and, in the process, generating supersonic relative velocities between ... More
Future CMB constraints on cosmic birefringence and implications for fundamental physicsApr 16 2019The primary scientific target of the CMB polarization experiments that are currently being built and proposed is the detection of primordial tensor perturbations. As a byproduct, these instruments will significantly improve constraints on cosmic birefringence, ... More
General Relativistic Cosmological N-body Simulations I: time integrationApr 16 2019This is the first in a series of papers devoted to fully general-relativistic $N$-body simulations applied to late-time cosmology. The purpose of this paper is to present the combination of a numerical relativity scheme, discretization method and time-integration ... More
Dicarbon formation in collisions of two carbon atomsApr 16 2019Radiative association cross sections and rates are computed, using a quantum approach, for the formation of C$_2$ molecules (dicarbon) during the collision of two ground state C($^3$P) atoms. We find that transitions originating in the C$\;^1\Pi_g$, d$\;^3\Pi_g$, ... More
Cosmological constraints on neutrino self-interactions with a light mediatorApr 16 2019If active neutrinos undergo non-standard (`secret') interactions (NS$\nu$I) the cosmological evolution of the neutrino fluid might be altered, leaving an imprint in cosmological observables. We use the latest publicly available CMB data from Planck to ... More
Properties of the stochastic astrophysical gravitational wave background: astrophysical sources dependenciesApr 16 2019This article explores the properties (amplitude and shape) of the angular power spectrum of the anisotropies of the astrophysical gravitational wave background (AGWB) focusing on the signatures of the astrophysical models describing sub-galactic physics. ... More
Radiative corrections to the Big-Bang Nucleosynthesis nuclear reaction ratesApr 16 2019We compute radiative corrections to nuclear reaction rates that determine the outcome of the Big-Bang Nucleosynthesis (BBN). Any nuclear reaction producing a photon with an energy above $2m_e$ must be supplemented by the corresponding reaction where the ... More
Stochastic gravitational wave background anisotropies: astrophysical dependencies in the LIGO/Virgo and LISA bandsApr 16 2019This letter characterizes the properties of the angular power spectrum in both the LIGO/Virgo and LISA frequency bands. It explores a wide range of self-consistent astrophysical models all calibrated such that they predict the same number of resolved ... More
Evolution of the mass-richness relation for the redMaPPer catalogApr 16 2019The accurate determination of the galaxy cluster mass-observable relations is one of the major challenge of modern astrophysics and cosmology. We present a new statistical methodology to constrain the evolution of the mass-observable relations. Instead ... More
Low-energy modified gravity signatures on the large-scale structuresApr 16 2019A large number of dark energy and modified gravity models lead to the same expansion history of the Universe, hence, making it difficult to distinguish them from observations. To make the calculations transparent, we consider $f(R)$ gravity with a pressureless ... More
The mass-richness relation of optically-selected clusters from weak gravitational lensing and abundance with Subaru HSC first-year dataApr 16 2019Constraining the relation between the richness $N$ and the halo mass $M$ over a wide redshift range for optically-selected clusters is a key ingredient for cluster-related science in optical surveys, including the Subaru Hyper Suprime-Cam (HSC) survey. ... More
Constraining Chaplygin models using diffuse supernova neutrino backgroundApr 16 2019In this work, we examine the possibility of using the diffuse supernova neutrino background (DSNB) to test the Chaplygin gas (CG) models of the Universe. With a typical star formation rate $\psi(z)$, supernova rate $R_{\mathrm{SN}}(z)$ and single supernova ... More
Are primordial black holes produced by entropy perturbations in single field inflationary models?Apr 16 2019We show that in single field inflationary models the super-horizon evolution of curvature perturbations on comoving slices $\mathcal{R}$, which can cause the production of primordial black holes (PBH), is not due to entropy perturbations but to a fast ... More
Effects of dynamical breaking in SUSY SU(5) to two standard modelsApr 15 2019Supersymmetric (SUSY) models and dynamical breaking of symmetries have been used to explain hierarchies of mass scales. We find that a chiral representation, $\bar{\bf 10}\, \oplus\, \bar{\bf 5}\, \oplus\, 2\cdot {\bf 5}$ in SUSY SU(5) in the hidden sector, ... More
Virgo: an unlikely cluster of galaxies because of its environmentApr 15 2019Galaxy clusters constitute powerful cosmological probes thanks to comparisons between observed and simulated clusters. As such Virgo constitutes a formidable source for detailed observations facilitated by its proximity. However, the diversity of clusters ... More
Exploring the CMB Power Suppression in Canonical Inflation ModelsApr 15 2019There exists some evidence of a suppression in power in the CMB multipoles around $l \sim 20-30$. If taken seriously, this is in tension with the simplest inflationary models driven by a single scalar field with a standard type of slowly varying potential ... More
Next generation cosmography with strong lensing and stellar dynamicsApr 15 2019We present a joint strong lensing and stellar dynamical framework for future time-delay cosmography purposes. Based on a pixelated source reconstruction and the axisymmetric Jeans equations, we are capable of constraining cosmological distances and hence ... More
Generalised model-independent characterisation of strong gravitational lenses VI: the origin of the formalism intrinsic degeneracies and their influence on $H_0$Apr 15 2019We give a physical interpretation of the formalism intrinsic degeneracies of the gravitational lensing formalism that we derived on a mathematical basis in part IV of this series. We find that all degeneracies occur due to the partition of the mass density ... More
New Binary Black Hole Mergers in the Second Observing Run of Advanced LIGO and Advanced VirgoApr 15 2019We report the detection of new binary black hole merger events in the publicly available data from the second observing run of advanced LIGO and advanced Virgo (O2). The mergers were discovered using the new search pipeline described in Venumadhav et ... More
Propagating Residual Biases in Cosmic Shear Power SpectraApr 15 2019In this paper we derive a full expression for the propagation of multiplicative and additive shape measurement biases into the cosmic shear power spectrum. In doing so we identify several new terms that are associated with selection effects, as well as ... More
Electron-interacting dark matter and implications from DAMA/LIBRA-phase2Apr 15 2019We investigate the possibility for the direct detection of low mass (GeV scale) WIMP dark matter in scintillation experiments. Such WIMPs are typically too light to leave appreciable nuclear recoils, but may be detected via their scattering off atomic ... More
Dark Energy, the Swampland and the Equivalence PrincipleApr 15 2019Apr 17 2019It has recently been argued that string theory does not admit de Sitter vacua. This would imply that the current accelerated expansion of the universe is not driven by a cosmological constant (or vacuum energy) but by other means such as a quintessential ... More
Dark Energy, the Swampland and the Equivalence PrincipleApr 15 2019It has recently been argued that string theory does not admit de Sitter vacua. This would imply that the current accelerated expansion of the universe is not driven by a cosmological constant (or vacuum energy) but by other means such as a quintessential ... More
The effect of dust bias on the census of neutral gas and metals in the high-redshift Universe due to SDSS-II quasar colour selectionApr 15 2019We present a systematic study of the impact of a dust bias on samples of damped Lyman-$\alpha$ absorbers (DLAs). This bias arises as an effect of the magnitude and colour criteria utilized in the Sloan Digital Sky Survey (SDSS) quasar target selection ... More
Cosmological constraints from the mass accretion rate I: galaxy cluster number count evolutionApr 15 2019Galaxy cluster number count has been proven to be a powerful cosmological probe. However, cosmological constraints established with galaxy cluster number count are highly dependent on the calibration of the mass-observable relations. Thanks to its nearly ... More
Axion Structure Formation II: The Wrath of CollapseApr 15 2019The first paper in this series showed that QCD axion dark matter, as a highly-correlated Bose fluid, contains extra-classical physics on cosmological scales. The nature of the derived extra-classical physics is exchange-correlation interactions induced ... More
Morphology of 21cm brightness temperature during the Epoch of Reioinization using Contour Minkowski TensorApr 15 2019We use morphological descriptors, Betti numbers and Contour Minkowski Tensor (CMT) on 21cm brightness temperature excursion sets, to study the ionization and heating history of the intergalactic medium (IGM) during and before the Epoch of Reionization ... More
The Complete Calibration of the Color-Redshift Relation (C3R2) Survey: Analysis and Data Release 2Apr 12 2019The Complete Calibration of the Color-Redshift Relation (C3R2) survey is a multi-institution, multi-instrument survey that aims to map the empirical relation of galaxy color to redshift to i~24.5 (AB), thereby providing a firm foundation for weak lensing ... More
Primordial Tensor Perturbation in Double Inflationary Scenario with a BreakApr 12 2019We study the primordial tensor perturbation produced from the double inflationary scenario with an intermediate break stage. Because of the transitions, the power spectrum deviates from the vacuum one and there will appear oscillatory behavior. In the ... More
Designing Horndeski and the effective fluid approachApr 12 2019We present a family of designer Horndeski models, i.e. models that have a background exactly equal to that of the $\Lambda$CDM model but perturbations given by the Horndeski theory. Then, we extend our effective fluid approach to Horndeski theories, providing ... More
Dynamical Analysis of Attractor Behavior in Constant Roll InflationApr 12 2019There has been considerable recent interest in a new class of non-slow roll inflationary solutions known as \textit{constant roll} inflation. Constant roll solutions are a generalization of the ultra-slow roll (USR) solution, where the first Hubble slow ... 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
Towards mapping turbulence in the intra-cluster medium -- I. Sample variance in spatially-resolved X-ray line diagnosticsApr 12 2019X-ray observations of galaxy clusters provide insights on the nature of gaseous turbulent motions, their physical scales and on the fundamental processes they are related to. Spatially-resolved, high-resolution spectral measurements of X-ray emission ... More
Dark-Ages Reionisation & Galaxy Formation Simulation XVI: The Thermal Memory of ReionisationApr 12 2019Intergalactic medium temperature is a powerful probe of the epoch of reionisation, as information is retained long after reionisation itself. However, mean temperatures are highly degenerate with the timing of reionisation, with the amount heat injected ... More
Cosmological constraints from cosmic homogeneityApr 12 2019In this paper, we study the normalised characteristic scale of transition to cosmic homogeneity, $\mathcal{R}_H/d_V$, as a cosmological probe. We use a compilation of the SDSS galaxy samples, comprising more than $10^6$ galaxies in the redshift range ... More
Strong Lens Models for 37 Clusters of Galaxies from the SDSS Giant Arcs SurveyApr 11 2019We present strong gravitational lensing models for 37 galaxy clusters from the SDSS Giant Arcs Survey. We combine data from multi-band Hubble Space Telescope WFC3imaging, with ground-based imaging and spectroscopy from Magellan, Gemini, APO, and MMT, ... More
Transient processing and analysis using $\texttt{AMPEL}$: Alert Management, Photometry and Evaluation of LightcurvesApr 11 2019Both multi-messenger astronomy and new high-throughput wide-field surveys require flexible tools for the selection and analysis of astrophysical transients. We here introduce the Alert Management, Photometry and Evaluation of Lightcurves (AMPEL) system, ... More
Feedback from supermassive black holes transforms centrals into passive galaxies by ejecting circumgalactic gasApr 11 2019Davies et al. (2019) established that for L^* galaxies the fraction of baryons in the circumgalactic medium (CGM) is inversely correlated with the mass of their central supermassive black holes (BHs) in the EAGLE hydrodynamic simulation. The interpretation ... More
Positivity in the skyApr 11 2019Positivity bounds - the consequences of requiring a unitary, causal, local UV completion - place strong restrictions on theories of dark energy and/or modified gravity. We derive and investigate such bounds for Horndeski scalar-tensor theories and for ... More
Holography for the very early Universe and the classic puzzles of Hot Big Bang cosmologyApr 11 2019We show that standard puzzles of hot Big Bang cosmology that motivated the introduction of cosmological inflation, such as the smoothness and horizon problem, the flatness problem, the relic problem, the way to generate enough entropy and perturbations, ... More
Dark energy and dark matter unification from dynamical space time: observational constraints and cosmological implicationsApr 11 2019A recently proposed Dynamical Space-time Cosmology (DSC) that unifies dark energy and dark matter is studied. The general action of this scenario includes a Lagrange multiplier, which is coupled to the energy-momentum tensor and a scalar field which is ... More
Probing the Early Universe with Axion Physics and Gravitational WavesApr 11 2019We show results for the expected reach of the network of experiments that is being set up globally with the aim of detecting the "invisible" axion, in light of a non-standard thermal history of the universe. Assuming that the axion is the dark matter, ... More
Higgs inflation in metric and Palatini formalisms: Required suppression of higher dimensional operatorsApr 11 2019We investigate the sensitivity of Higgs(-like) inflation to higher dimensional operators in the nonminimal couplings and in the potential, both in the metric and Palatini formalisms. We find that, while inflationary predictions are relatively stable against ... More
Several Problems in Particle Physics and Cosmology Solved in One SMASHApr 11 2019The Standard Model (SM) of particle physics is a big success. However, it lacks explanations for cosmic inflation, the matter-anti-matter asymmetry of the Universe, dark matter, neutrino oscillations, and the feebleness of CP violation in the strong interactions. ... More
Cherenkov in the Sky: Measuring the Sound Speed of Primordial Scalar FluctuationsApr 11 2019We consider production of additional relativistic particles coupled to the inflaton. We show that the imprints of these particles on the spectrum of primordial perturbations can be used for the direct measurement of the speed of sound of scalar perturbations, ... More
Alcock-Paczynski Test with the Evolution of Redshift-Space Galaxy Clustering AnisotropyApr 11 2019We develop an improved Alcock-Paczynski (AP) test method that uses the redshift-space two-point correlation function (2pCF) of galaxies. Cosmological constraints can be obtained by examining the redshift dependence of the normalized 2pCF, which should ... More
Molecular Gas of the Most Massive Spiral Galaxies I: a Case Study of NGC 5908Apr 10 2019We present IRAM 30m observations of molecular lines of CO and its isotopologues from the massive spiral galaxy NGC 5908 selected from the CGM-MASS sample. $^{12}$CO $J=1-0$, $^{12}$CO $J=2-1$, and $^{13}$CO $J=1-0$ lines have been detected in most of ... More
Cosmic Shear: Inference from Forward ModelsApr 10 2019Density-estimation likelihood-free inference (DELFI) has recently been proposed as an efficient method for simulation-based cosmological parameter inference. Compared to the standard likelihood-based Markov Chain Monte Carlo (MCMC) approach, DELFI has ... More
The density distribution of accreting cosmic filaments as shaped by Kelvin-Helmholtz instabilityApr 10 2019Cosmic filaments play a crucial role in galaxy evolution transporting gas from the intergalactic medium into galaxies. However, little is known about the efficiency of this process and whether the gas is accreted in a homogenous or clumpy way. Recent ... More
The search for anisotropy in the gravitational-wave background with pulsar-timing arrays and astrometryApr 10 2019Pulsar-timing arrays (PTAs) are seeking gravitational waves from supermassive-black-hole binaries, and there are prospects to complement these searches with stellar-astrometry measurements. Theorists still disagree, however, as to whether the local gravitational-wave ... More
Dark energy perturbations in $N$-body simulationsApr 10 2019We present $N$-body simulations which are fully compatible with general relativity, with dark energy consistently included at both the background and perturbation level. We test our approach for dark energy parameterised as both a fluid, and using the ... More
Forecasts for Low Spin Black Hole Spectroscopy in Horndeski GravityApr 10 2019We investigate the prospect of using black hole spectroscopy to constrain the parameters of Horndeski gravity through observations of gravitational waves from perturbed black holes. We study the gravitational waves emitted during ringdown from black holes ... More
Fermionic decay of a massive scalar in the early UniverseApr 10 2019We derive a curved space generalization of a scalar to fermion decay rate with a Yukawa coupling in expanding Friedmann-Robertson-Walker universes. This is done using the full theory of quantum fields in curved spacetime and the added-up transition probability ... More
A Gravitational Ising Model for the Statistical Bias of GalaxiesApr 10 2019Evaluation of gravitational theories by means of cosmological data suffers from the fact that galaxies are biased tracers of dark matter. Current bias models focus primarily on high-density regions, whereas low-density regions carry significant amounts ... More
Kompaneets equation for neutrinos: Application to neutrino heating in supernova explosionsApr 10 2019We derive a `Kompaneets equation' for neutrinos, which describes how the distribution function of neutrinos interacting with matter deviates from a Fermi-Dirac distribution with zero chemical potential. To this end, we expand the collision integral in ... More
Too Big To Fail in Light of GaiaApr 09 2019We point out an anti-correlation between the central dark matter (DM) densities of the bright Milky Way dwarf spheroidal galaxies (dSphs) and their orbital pericenter distances inferred from Gaia data. The dSphs that have not come close to the Milky Way ... More
The Detailed Science Case for the Maunakea Spectroscopic Explorer, 2019 editionApr 09 2019(Abridged) The Maunakea Spectroscopic Explorer (MSE) is an end-to-end science platform for the design, execution and scientific exploitation of spectroscopic surveys. It will unveil the composition and dynamics of the faint Universe and impact nearly ... More
Back to the Lithium Plateau with J0023+0307 with [Fe/H]<-6Apr 09 2019We present an analysis of the UVES high-resolution spectroscopic observations at the 8.2m VLT of J0023+0307, a main-sequence extremely iron-poor dwarf star. We are unable to detect iron lines in the spectrum but derive [Fe/H]<-6.1 from the Ca II resonance ... More
Mimetic gravity: mimicking the dynamics of the primeval universe in the context of loop quantum cosmologyApr 09 2019Mimetic gravity can be described as a formulation capable of mimicking different evolutionary scenarios regarding the universe dynamics. Notwithstanding its initial aim of producing a similar evolution to the one expected from the dark components of the ... More
Common origin of modified chaotic inflation, non thermal dark matter and Dirac neutrino massApr 09 2019We propose a minimal extension of the standard model of particle physics to accommodate cosmic inflation, dark matter and light neutrino masses. While the inflationary phase is obtained from a modified chaotic inflation scenario, consistent with latest ... More
Minimal Two-component Scalar Doublet Dark Matter with Radiative Neutrino MassApr 09 2019We propose a minimal extension of the Standard Model to accommodate two-component dark matter (DM) and light neutrino mass. The symmetry of the Standard Model is enhanced by an unbroken $\mathbb{Z}_2 \times \mathbb{Z}'_2$ such that being odd under each ... More
Uncertainties in Direct Dark Matter Detection in Light of GAIAApr 09 2019Direct detection experiments have set increasingly stringent limits on the cross section for spin-independent dark matter-nucleon interactions. In obtaining such limits, experiments primarily assume the standard halo model (SHM) as the distribution of ... More
Testing the scale-dependent hemispherical asymmetry with the 21-cm power spectrum from the epoch of reionizationApr 09 2019Hemispherical power asymmetry has emerged as a new challenge to cosmology in early universe. While the cosmic microwave background (CMB) measurements indicated the asymmetry amplitude $A \simeq 0.07$ at the CMB scale $k_{\rm CMB}\simeq 0.0045\,{\rm Mpc}^{-1}$, ... More
Early evolution of galaxies and of large-scale structure from CMB experimentsApr 09 2019Next generation CMB experiments with arcmin resolution will, for free, lay the foundations for a real breakthrough on the study of the early evolution of galaxies and galaxy clusters, thanks to the detection of large samples of strongly gravitationally ... More
Weyl Symmetry Inspired Inflation and Dark MatterApr 09 2019Motivated by the original Weyl scaling gauge symmetry, we present a theoretical framework to explain cosmic inflation and dark matter simultaneously. This symmetry has been resurrected in recent attempts to formulate the gauge theory of gravity. We show ... More
Recursion relations for gravitational lensingApr 09 2019The weak lensing formalism can be extended to the strong lensing regime by integrating the nonlinear geodesic deviation equation. The resulting "roulette" expansion generalises convergence, shear and flexion to arbitrary order. By formulating this into ... More
Lyman-alpha emitters in a cosmological volume II: the impact of the intergalactic mediumApr 08 2019In the near future galaxy surveys will target Lyman alpha emitting galaxies (LAEs) to unveil the nature of the dark energy. It has been suggested that the observability of LAEs is coupled to the large scale properties of the intergalactic medium. Such ... More
Statistics of Inflating Regions in Eternal InflationApr 08 2019We compute the distribution of sizes of inflating regions (surrounded by non inflating ones) in an eternally inflating Universe. As a first illustrative problem, we study a simple scenario of an eternally inflating Universe in the presence of a massless ... More
Measuring the dark matter velocity anisotropy to the cluster edgeApr 08 2019Dark matter dominates the properties of large cosmological structures such as galaxy clusters, and the mass profiles of the dark matter have been measured for these equilibrated structures for years using X-rays, lensing or galaxy velocities. A new method ... More
Dark Sector Equilibration During NucleosynthesisApr 08 2019Light, weakly-coupled dark sectors may be naturally decoupled in the early universe and enter equilibrium with the Standard Model bath during the epoch of primordial nucleosynthesis. The equilibration and eventual decoupling of dark sector states modifies ... More
Constraining the Rotational Kinematic Sunyaev-Zel'dovich Effect in Massive Galaxy ClustersApr 08 2019We constrain the rotational kinematic Sunyaev-Zel'dovich (rkSZ) effect in Planck data using a sample of rotating galaxy clusters identified in the Sloan Digital Sky Survey (SDSS). We extract cluster-centered cutouts from Planck cosmic microwave background ... More
Revisiting the Instability Problem of Interacting Dark Energy Model in the Parametrized Post-Friedmann FrameworkApr 08 2019Dark energy might interact with dark matter in a direct, non-gravitational way, which can help remedy several theoretical defects. In order to find out the properties of interacting dark energy models, it is necessary to investigate the cosmological perturbations ... More
From top-hat masking to smooth transitions: P-filter and its application to polarized microwave sky mapsApr 08 2019In CMB science, the simplest idea to remove a contaminated sky region is to multiply the sky map with a mask that is 0 for the contaminated region and 1 elsewhere, which is also called a top-hat masking. Although it is easy to use, such top-hat masking ... More