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Revealing the Dark Matter Halo with Axion Direct Detection: The next generation of axion direct detection experiments may rule out or
confirm axions as the dominant source of dark matter. We develop a general
likelihood-based framework for studying the time-series data at such
experiments, with a focus on the role of d... | astro-ph_CO |
Type Ia Supernova Colors and Ejecta Velocities: Hierarchical Bayesian
Regression with Non-Gaussian Distributions: We investigate the statistical dependence of the peak intrinsic colors of
Type Ia supernovae (SN Ia) on their expansion velocities at maximum light,
measured from the Si II 6355 spectral feature. We const... | astro-ph_CO |
Detailed Calculation of Primordial Black Hole Formation During
First-Order Cosmological Phase Transitions: We recently presented a new mechanism for primordial black hole formation
during a first-order phase transition in the early Universe, which relies on
the build-up of particles which are predominantly reflected ... | astro-ph_CO |
The Data Release of the Sloan Digital Sky Survey-II Supernova Survey: This paper describes the data release of the Sloan Digital Sky Survey-II
(SDSS-II) Supernova Survey conducted between 2005 and 2007. Light curves,
spectra, classifications, and ancillary data are presented for 10,258 variable
and transient sources di... | astro-ph_CO |
Imprints of Oscillatory Bispectra on Galaxy Clustering: Long-short mode coupling during inflation, encoded in the squeezed bispectrum
of curvature perturbations, induces a dependence of the local, small-scale
power spectrum on long-wavelength perturbations, leading to a scale-dependent
halo bias. While this scale depen... | astro-ph_CO |
Improved Modeling of the Kinematic Sunyaev-Zel'dovich Projected-Fields
signal and its Cosmological Dependence: Over the past decade, the kinematic Sunyaev-Zel'dovich (kSZ) effect has
emerged as an observational probe of the distribution of baryons and velocity
fields in the late Universe. Of the many ways to detect t... | astro-ph_CO |
Velocity-Density Correlations from the cosmicflows-3 Distance Catalog
and the 2MASS Redshift Survey: The peculiar velocity of a mass tracer is on average aligned with the dipole
modulation of the surrounding mass density field. We present a first
measurement of the correlation between radial peculiar velocities of ob... | astro-ph_CO |
Alleviating the $H_0$ and $σ_8$ anomalies with a decaying dark
matter model: The Hubble tension between the $\Lambda$CDM-model-dependent prediction of the
current expansion rate $H_0$ using Planck data and direct, model-independent
measurements in the local universe from the SH0ES collaboration disagree at
$>3.5\sigm... | astro-ph_CO |
The impact of the supersonic baryon-dark matter velocity difference on
the z~20 21cm background: Recently, Tseliakhovich and Hirata (2010) showed that during the cosmic Dark
Ages the baryons were typically moving supersonically with respect to the dark
matter with a spatially variable Mach number. Such supersonic mot... | astro-ph_CO |
Estimating Black Hole Masses in Quasars Using Broad Optical and UV
Emission Lines: We review past work using broad emission lines as virial estimators of black
hole masses in quasars. Basically one requires estimates of the emitting region
radius and virial velocity dispersion to obtain black hole masses. The three
m... | astro-ph_CO |
The F-GAMMA program: multi-wavelength AGN studies in the Fermi-GST era: The F -GAMMA program is a coordinated effort of several observing facilities
to understand the AGN/blazar phenomenon via a multi-frequency monitoring
approach, especially in the era of Fermi-GST. Some 60 prominent sources are
monitored monthly with... | astro-ph_CO |
On the relativistic mass function and averaging in cosmology: The general relativistic description of cosmological structure formation is
an important challenge from both the theoretical and the numerical point of
views. In this paper we present a brief prescription for a general relativistic
treatment of structure for... | astro-ph_CO |
On the Effective Equation of State of Dark Energy: In an effective field theory model with an ultraviolet momentum cutoff, there
is a relation between the effective equation of state of dark energy and the
ultraviolet cutoff scale. It implies that a measure of the equation of state of
dark energy different from minus o... | astro-ph_CO |
Measuring cosmic bulk flows with Type Ia Supernovae from the Nearby
Supernova Factory: Context. Our Local Group of galaxies appears to be moving relative to the
cosmic microwave background with the source of the peculiar motion still
uncertain. While in the past this has been studied mostly using galaxies as
distance... | astro-ph_CO |
Population III.1 and III.2 gamma-Ray Bursts: Constraints on the event
rate for future radio and X-ray surveys: We calculate the theoretical event rate of gamma-ray bursts (GRBs) from the
collapse of massive first-generation (Population III; Pop III) stars. The Pop
III GRBs could be super-energetic with the isotropic ... | astro-ph_CO |
Measuring the lensing potential with tomographic galaxy number counts: We investigate how the lensing potential can be measured tomographically with
future galaxy surveys using their number counts. Such a measurement is an
independent test of the standard $\Lambda$CDM framework and can be used to
discern modified theor... | astro-ph_CO |
The Extragalactic Distance Database: A database can be accessed on the web at http://edd.ifa.hawaii.edu that was
developed to promote access to information related to galaxy distances. The
database has three functional components. First, tables from many literature
sources have been gathered and enhanced with links thr... | astro-ph_CO |
Integral field spectroscopy with SINFONI of VVDS galaxies. I. Galaxy
dynamics and mass assembly at 1.2 < z < 1.6: Context. Identifying the main processes of galaxy assembly at high redshifts
is still a major issue to understand galaxy formation and evolution at early
epochs in the history of the Universe. Aims. This ... | astro-ph_CO |
Cosmological Limits on Hidden Sector Dark Matter: We explore the model-independent constraints from cosmology on a dark-matter
particle with no prominent standard model interactions that interacts and
thermalizes with other particles in a hidden sector. Without specifying
detailed hidden-sector particle physics, we cha... | astro-ph_CO |
Abell 2744 may be a supercluster aligned along the sightline: To explain the unusual richness and compactness of the Abell 2744, we propose
a hypothesis that it may be a rich supercluster aligned along the sightline,
and present a supporting evidence obtained numerically from the MultiDark
Planck 2 simulations with a l... | astro-ph_CO |
The Herschel-SPIRE Legacy Survey (HSLS): the scientific goals of a
shallow and wide submillimeter imaging survey with SPIRE: A large sub-mm survey with Herschel will enable many exciting science
opportunities, especially in an era of wide-field optical and radio surveys and
high resolution cosmic microwave background... | astro-ph_CO |
Constraints on non-resonant photon-axion conversion from the Planck
satellite data: The non-resonant conversion of Cosmic Microwave Background (CMB) photons into
scalar as well as light pseudoscalar particles such as axion-like particles
(ALPs) in the presence of turbulent magnetic fields can cause a unique,
spatiall... | astro-ph_CO |
Astrophysical Probes of Fundamental Physics: The dramatic confrontation between new observations and theories of the early
and recent universe makes cosmology one of the most rapidly advancing fields in
the physical sciences. The universe is a unique laboratory in which to probe
fundamental physics, the rationale being... | astro-ph_CO |
On the Lyth bound and single field slow-roll inflation: We take a pragmatic, model independent approach to single field slow-roll
inflation by imposing conditions to the slow-roll parameter $\epsilon$ and its
derivative $\epsilon^{\prime }.$ To accommodate the recent (large) values of
$r$ reported by the BICEP2 collabo... | astro-ph_CO |
Structures of Local Galaxies Compared to High Redshift Star-forming
Galaxies: The rest-frame far-ultraviolet (FUV) morphologies of 8 nearby interacting and
starburst galaxies (Arp 269, M 82, Mrk 8, NGC 520, NGC 1068, NGC 3079, NGC
3310, NGC 7673) are compared with 54 galaxies at z ~ 1.5 and 46 galaxies at z ~
4 obser... | astro-ph_CO |
The Power Spectra of Polarized, Dusty Filaments: We develop an analytic model for the power spectra of polarized filamentary
structures as a way to study the Galactic polarization foreground to the Cosmic
Microwave Background. Our approach is akin to the cosmological halo-model
framework, and reproduces the main featur... | astro-ph_CO |
Structure formation with suppressed small-scale perturbations: All commonly considered dark matter scenarios are based on hypothetical
particles with small but non-zero thermal velocities and tiny interaction
cross-sections. A generic consequence of these attributes is the suppression of
small-scale matter perturbation... | astro-ph_CO |
Neutral hydrogen in galaxy clusters: impact of AGN feedback and
implications for intensity mapping: By means of zoom-in hydrodynamic simulations we quantify the amount of
neutral hydrogen (HI) hosted by groups and clusters of galaxies. Our
simulations, which are based on an improved formulation of smoothed particle
h... | astro-ph_CO |
Updated constraint on a primordial magnetic field during big bang
nucleosynthesis and a formulation of field effects: A new upper limit on the amplitude of primordial magnetic field (PMF) is
derived by a comparison between a calculation of elemental abundances in big
bang nucleosynthesis (BBN) model and the latest ob... | astro-ph_CO |
Forecast and analysis of the cosmological redshift drift: The cosmological redshift drift could lead to the next step in high-precision
cosmic geometric observations, becoming a direct and irrefutable test for
cosmic acceleration. In order to test the viability and possible properties of
this effect, also called Sandag... | astro-ph_CO |
On the Bispectra of Very Massive Tracers in the Effective Field Theory
of Large-Scale Structure: The Effective Field Theory of Large-Scale Structure (EFTofLSS) provides a
consistent perturbative framework for describing the statistical distribution
of cosmological large-scale structure. In a previous EFTofLSS calcula... | astro-ph_CO |
The Structure of HE 1104-1805 from Infrared to X-Ray: The gravitationally lensed quasar HE 1104-1805 has been observed at a variety
of wavelengths ranging from the mid-infrared to X-ray for nearly 20 years. We
combine flux ratios from the literature, including recent Chandra data, with
new observations from the SMARTS ... | astro-ph_CO |
Magnetic Fields of Agns and Standard Accretion Disk Model: Testing by
Optical Polarimetry: We have developed the method that allows us to estimate the magnetic field
strength at the horizon of a supermassive black hole (SMBH) through the
observed polarization of optical emission of the accreting disk surrounding
SMBH... | astro-ph_CO |
Galaxy Bias and $σ_8$ from Counts in Cells from the SDSS Main
Sample: The counts-in-cells (CIC) galaxy probability distribution depends on both the
dark matter clustering amplitude $\sigma_8$ and the galaxy bias $b$. We present
a theory for the CIC distribution based on a previous prescription of the
underlying dark ... | astro-ph_CO |
Discovery of Hydrogen Fluoride in the Cloverleaf Quasar at z = 2.56: We report the first detection of hydrogen fluoride (HF) toward a high
redshift quasar. Using the Caltech Submillimeter Observatory (CSO) we detect
the HF J = 1 - 0 transition in absorption toward the Cloverleaf, a broad
absorption line (BAL) quasi-ste... | astro-ph_CO |
Testing MONDian Dark Matter with Galactic Rotation Curves: MONDian dark matter (MDM) is a new form of dark matter quantum that naturally
accounts for Milgrom's scaling, usually associated with modified Newtonian
dynamics (MOND), and theoretically behaves like cold dark matter (CDM) at
cluster and cosmic scales. In this... | astro-ph_CO |
Angular Correlation Function from sample covariance with BOSS and eBOSS
LRG: The Baryon Acoustic Oscillations (BAO) are one of the most used probes to
understand the accelerated expansion of the Universe. Traditional methods rely
on fiducial model information within their statistical analysis, which may be a
problem ... | astro-ph_CO |
Effective Theory of Large-Scale Structure with Primordial
Non-Gaussianity: We develop the effective theory of large-scale structure for non-Gaussian
initial conditions. The effective stress tensor in the dark matter equations of
motion contains new operators, which originate from the squeezed limit of the
primordial ... | astro-ph_CO |
Detecting relic gravitational waves in the CMB: Optimal parameters and
their constraints: The prospect of detecting relic gravitational waves (RGWs), through their
imprint in the cosmic microwave background radiation, provides an excellent
opportunity to study the very early Universe. In simplest viable theoretical
m... | astro-ph_CO |
The effect of early radiation in N-body simulations of cosmic structure
formation: Newtonian N-body simulations have been employed successfully over the past
decades for the simulation of the cosmological large-scale structure. Such
simulations usually ignore radiation perturbations (photons and massless
neutrinos) a... | astro-ph_CO |
Redshift-space distortions with wide angular separations: Redshift-space distortions are generally considered in the plane parallel
limit, where the angular separation between the two sources can be neglected.
Given that galaxy catalogues now cover large fractions of the sky, it becomes
necessary to consider them in a ... | astro-ph_CO |
Probing Two-Field Open Inflation by Resonant Signals in Correlation
Functions: We derive oscillatory signals in correlation functions in two-field open
inflation by means of the in-in formalism; such signatures are caused by
resonances between oscillations in the tunnelling field and fluctuations in the
inflaton duri... | astro-ph_CO |
Ammonia as a Temperature Tracer in the Ultraluminous Galaxy Merger
Arp220: (abridged) We present ATCA and GBT observations of ammonia (NH3) toward the
ultraluminous infrared galaxy (ULIRG) merger Arp220. We detect the NH3 (1,1),
(2,2), (3,3), (4,4), (5,5), and (6,6) inversion lines in absorption against the
unresolve... | astro-ph_CO |
Redshift Space Distortion of the 21cm Background from the Epoch of
Reionization I: Methodology Re-examined: The peculiar velocity of the intergalactic gas responsible for the cosmic
21cm background from the epoch of reionization and beyond introduces an
anisotropy in the three-dimensional power spectrum of brightness... | astro-ph_CO |
Is a co-rotating Dark Disk a threat to Dark Matter Directional Detection
?: Recent N-Body simulations are in favor of the presence of a co-rotating Dark
Disk that might contribute significantly (10%-50%) to the local Dark Matter
density. Such substructure could have dramatic effect on directional detection.
Indeed, i... | astro-ph_CO |
Supernovae in paired galaxies: We investigate the influence of close neighbor galaxies on the properties of
supernovae (SNe) and their host galaxies using 56 SNe located in pairs of
galaxies with different levels of star formation (SF) and nuclear activity. The
mean distance of type II SNe from nuclei of hosts is great... | astro-ph_CO |
Optimal non-linear transformations for large scale structure statistics: Recently, several studies proposed non-linear transformations, such as a
logarithmic or Gaussianization transformation, as efficient tools to recapture
information about the (Gaussian) initial conditions. During non-linear
evolution, part of the c... | astro-ph_CO |
The Ultraluminous State: (Abridged) We revisit the question of the nature of ULXs through a detailed
investigation of their spectral shape, using the highest quality X-ray data
available in the XMM-Newton public archives. We confirm that simple spectral
models commonly used for the analysis and interpretation of ULXs (... | astro-ph_CO |
Evidence for massive neutrinos from CMB and lensing observations: We discuss whether massive neutrinos (either active or sterile) can reconcile
some of the tensions within cosmological data that have been brought into focus
by the recently released {\it Planck} data. We point out that a discrepancy is
present when comp... | astro-ph_CO |
Indirect Detection of Decaying Dark Matter with High Angular Resolution:
Case for axion search by IRCS at Subaru Telescope: Recent advances in cosmic-ray detectors have provided exceptional
sensitivities of dark matter with high angular resolution. Motivated by this,
we present a comprehensive study of cosmic-ray flu... | astro-ph_CO |
AGN feedback in galaxy groups: a joint GMRT/X-ray study: We present an ongoing study of 18 nearby galaxy groups, chosen for the
availability of Chandra and/or XMM-Newton data and evidence for AGN/hot
intragroup gas interaction. We have obtained 235 and 610 MHz observations at
the GMRT for all the groups, and 327 and 15... | astro-ph_CO |
Phenomenological consequences of superfluid dark matter with
baryon-phonon coupling: Recently, a new form of dark matter has been suggested to naturally reproduce
the empirically successful aspects of Milgrom's law in galaxies. The dark
matter particle candidates are axion-like, with masses of order eV and strong
sel... | astro-ph_CO |
Cosmological Implications of the Tetron Model of Elementary Particles: Based on a possible solution to the tetron spin problem, a modification of
the standard Big Bang scenario is suggested, where the advent of a spacetime
manifold is connected to the appearance of tetronic bound states. The metric
tensor is constructe... | astro-ph_CO |
Probing high-redshift quasars with ALMA. I. Expected observables and
potential number of sources: (abridged) We explore how ALMA observations can probe high-redshift galaxies
in unprecedented detail. We discuss the main observables that are excited by
the large-scale starburst, and formulate expectations for the chem... | astro-ph_CO |
The Accretion Disc Particle Method for Simulations of Black Hole Feeding
and Feedback: Black holes grow by accreting matter from their surroundings. However,
angular momentum provides an efficient natural barrier to accretion and so only
the lowest angular momentum material will be available to feed the black holes.
... | astro-ph_CO |
A highly precise shear bias estimator independent of the measured shape
noise: We present a new method to estimate shear measurement bias in image
simulations that significantly improves the precision with respect to current
techniques. Our method is based on measuring the shear response for individual
images. We gen... | astro-ph_CO |
Diffuse optical intracluster light as a measure of stellar tidal
stripping: the cluster CL0024+17 at $z\sim $0.4 observed at LBT: We have evaluated the diffuse intracluster light (ICL) in the central core of
the galaxy cluster CL0024+17 at $z\sim 0.4$ observed with the prime focus
camera (LBC) at LBT. The measure req... | astro-ph_CO |
Are Newly Discovered HI High Velocity Clouds Minihalos in the Local
Group?: A set of HI sources extracted from the north Galactic polar region by the
ongoing ALFALFA survey has properties that are consistent with the
interpretation that they are associated with isolated minihalos in the
outskirts of the Local Group (... | astro-ph_CO |
Is the lack of power anomaly in the CMB correlated with the orientation
of the Galactic plane?: The lack of power at large angular scales in the CMB temperature anisotropy
pattern is a feature known to depend on the size of the Galactic mask. Not only
the large scale anisotropy power in the CMB is lower than the best... | astro-ph_CO |
cosmoabc: Likelihood-free inference via Population Monte Carlo
Approximate Bayesian Computation: Approximate Bayesian Computation (ABC) enables parameter inference for
complex physical systems in cases where the true likelihood function is
unknown, unavailable, or computationally too expensive. It relies on the
forwa... | astro-ph_CO |
A designer approach to $f(Q)$ gravity and cosmological implications: We investigate the evolution of linear perturbations in the Symmetric
Teleparallel Gravity, namely $f(Q)$ gravity, for which we design the $f(Q)$
function to match specific expansion histories. We consider different
evolutions of the effective dark en... | astro-ph_CO |
Accelerating MCMC algorithms through Bayesian Deep Networks: Markov Chain Monte Carlo (MCMC) algorithms are commonly used for their
versatility in sampling from complicated probability distributions. However, as
the dimension of the distribution gets larger, the computational costs for a
satisfactory exploration of the... | astro-ph_CO |
Constraints on Cosmographic Functions of Cosmic Chronometers Data Using
Gaussian Processes: We study observational constraints on the cosmographic functions up to the
fourth derivative of the scale factor with respect to cosmic time, i.e., the
so-called snap function, using the non-parametric method of Gaussian Proce... | astro-ph_CO |
Observational Constraints on the Modified Gravity Model (MOG) Proposed
by Moffat: Using the Magellanic System: A simple model for the dynamics of the Magellanic Stream (MS), in the
framework of modified gravity models is investigated. We assume that the galaxy
is made up of baryonic matter out of context of dark matt... | astro-ph_CO |
A numerical study of pseudoscalar inflation with an axion-gauge field
coupling: A numerical study of a pseudoscalar inflation having an axion-photon-like
coupling is performed by solving numerically the coupled differential equations
of motion for inflaton and photon mode functions from the onset of inflation to
the ... | astro-ph_CO |
Higgs-induced spectroscopic shifts near strong gravity sources: We explore the consequences of the mass generation due to the Higgs field in
strong gravity astrophysical environments. The vacuum expectation value of the
Higgs field is predicted to depend on the curvature of spacetime, potentially
giving rise to peculia... | astro-ph_CO |
Exploring the Dark Universe: constraints on dynamical Dark Energy models
from CMB, BAO and growth rate measurements: In order to explain the current acceleration of the Universe, the fine tuning
problem of the cosmological constant $\Lambda$ and the cosmic coincidence
problem, different alternative models have been p... | astro-ph_CO |
Constraint on Heavy Element Production in Inhomogeneous Big-Bang
Nucleosynthesis from The Light-Element Observations: We investigate the observational constraints on the inhomogeneous big-bang
nucleosynthesis that Matsuura et al. suggested the possibility of the heavy
element production beyond ${}^7$Li in the early u... | astro-ph_CO |
The coordinated key role of wet, mixed, and dry major mergers in the
buildup of massive early-type galaxies at z<~1: Hierarchical models predict that massive early-type galaxies (mETGs) derive
from the most massive and violent merging sequences occurred in the Universe.
However, the role of wet, mixed, and dry major ... | astro-ph_CO |
The Merger Rate of Primordial Black Hole-Neutron Star Binaries in
Ellipsoidal-Collapse Dark Matter Halo Models: Primordial black holes (PBHs), as a potential macroscopic candidate for dark
matter, can encounter other compact objects in dark matter halos because of
their random distribution. Besides, the detection of ... | astro-ph_CO |
Beyond Spherical Top Hat Collapse: We study the evolution of inhomogeneous spherical perturbations in the
universe in a way that generalizes the spherical top hat collapse in a
straightforward manner. For that purpose we derive a dynamical equation for the
evolution of the density contrast in the context of a Lemaitre-... | astro-ph_CO |
Learning from Topology: Cosmological Parameter Estimation from the
Large-scale Structure: The topology of the large-scale structure of the universe contains valuable
information on the underlying cosmological parameters. While persistent
homology can extract this topological information, the optimal method for
parame... | astro-ph_CO |
The eROSITA view of the Abell 3391/95 field: The Northern Clump. The
largest infalling structure in the longest known gas filament observed with
eROSITA, XMM-Newton, and Chandra: SRG/eROSITA PV observations revealed the A3391/95 cluster system and the
Northern Clump (MCXC J0621.7-5242 galaxy cluster) are aligning a... | astro-ph_CO |
Strong lensing modeling in galaxy clusters as a promising method to test
cosmography I. Parametric dark energy models: In this paper we probe five cosmological models for which the dark energy
equation of state parameter, $w(z)$, is parameterized as a function of redshift
using strong lensing data in the galaxy clust... | astro-ph_CO |
Implications of multiple high-redshift galaxy clusters: To date, 14 high-redshift (z>1.0) galaxy clusters with mass measurements have
been observed, spectroscopically confirmed and are reported in the literature.
These objects should be exceedingly rare in the standard LCDM model. We
conservatively approximate the sele... | astro-ph_CO |
Cosmological observations in the radio domain: the contribution of
extragalactic sources: The low frequency tail of the CMB spectrum, down along the radio range (~1
GHz), may carry weak spectral distortions which are fingerprints of processes
occurred during different epochs of the thermal history of the Universe, fr... | astro-ph_CO |
Evolution of the $fσ_8$ tension with the Planck15/$Λ$CDM
determination and implications for modified gravity theories: We construct an updated extended compilation of distinct (but possibly
correlated) $f\sigma_8(z)$ Redshift Space Distortion (RSD) data published
between 2006 and 2018. It consists of 63 datapoints an... | astro-ph_CO |
Sensitivity and foreground modelling for large-scale CMB B-mode
polarization satellite missions: The measurement of the large-scale B-mode polarization in the cosmic
microwave background (CMB) is a fundamental goal of future CMB experiments.
However, because of unprecedented sensitivity, future CMB experiments will b... | astro-ph_CO |
Constraints on turbulent pressure in the X-ray halos of giant elliptical
galaxies from resonant scattering: The dense cores of X-ray emitting gaseous halos of large elliptical galaxies
with temperatures below about 0.8 keV show two prominent Fe XVII emission
features, which provide a sensitive diagnostic tool to meas... | astro-ph_CO |
Primordial Non-Gaussianity from G-inflation: Enormous information about interactions is contained in the non-Gaussianities
of the primordial curvature perturbations, which are essential to break the
degeneracy of inflationary models. We study the primordial bispectra for
G-inflation models predicting both sharp and bro... | astro-ph_CO |
The evolution of the AGN content in groups up to z~1: Determining the AGN content in structures of different mass/velocity
dispersion and comparing them to higher mass/lower redshift analogs is
important to understand how the AGN formation process is related to
environmental properties. We use our well-tested cluster f... | astro-ph_CO |
A Wide-field High Resolution HI Mosaic of Messier 31: I. Opaque Atomic
Gas and Star Formation Rate Density: We have undertaken a deep, wide-field HI imaging survey of M31, reaching a
maximum resolution of about 50 pc and 2 km/s across a 95x48 kpc region. The HI
mass and brightness sensitivity at 100 pc resolution for... | astro-ph_CO |
A note on Low Energy Effective Theory of Chromo Natural Inflation in the
light of BICEP2 results: Recent result of BICEP2, revealing a larger value of tensor to scalar ratio
(r), has opened up new investigations of the in ationary models to fit the
experimental data. The experiment needs to reconfirm the results, spe... | astro-ph_CO |
The impact of the SZ effect on cm-wavelength (1-30 GHz) observation of
galaxy cluster radio relics: (Abridged) Radio relics in galaxy clusters are believed to be associated with
powerful shock fronts that originate during cluster mergers, and are a testbed
for the acceleration of relativistic particles in the intracl... | astro-ph_CO |
A high-resolution self-consistent whole sky foreground model: The neutral hydrogen 21cm line is potentially a very powerful probe of the
observable universe, and a number of on-going experiments are trying to detect
it at cosmological distances. However, the presence of strong foreground
radiations such as the galactic... | astro-ph_CO |
The Sloan Great Wall. Rich clusters: We present the results of the study of the substructure and galaxy content of
ten rich clusters of galaxies in three different superclusters of the Sloan
Great Wall. We determine the substructure in clusters using the 'Mclust'
package from the 'R' statistical environment and analyse... | astro-ph_CO |
Ghost Collapse : exploring feasibility of spurious Spherical Collapses: We explore the real solutions to the Spherical Collapse Model in a non-flat
Universe with a Cosmological Constant, and observe a possible situation for a
fake or Ghost Collapse, in which an expanding overdense spherical region, turns
around and beg... | astro-ph_CO |
Observational signatures of microlensing in gravitational waves at
LIGO/Virgo frequencies: Microlenses with typical stellar masses (a few ${\rm M}_{\odot}$) have
traditionally been disregarded as potential sources of gravitational lensing
effects at LIGO/Virgo frequencies, since the time delays are often much smaller... | astro-ph_CO |
Beyond Concordance Cosmology with Magnification of Gravitational-Wave
Standard Sirens: We show how future gravitational-wave detectors would be able of
discriminating between the concordance LCDM cosmological model and up-to-date
competing alternatives, e.g. dynamical dark energy models (DE) or modified
gravity theor... | astro-ph_CO |
The deconvolved distribution estimator: enhancing reionisation-era CO
line-intensity mapping analyses with a cross-correlation analogue for
one-point statistics: We present the deconvolved distribution estimator (DDE), an extension of the
voxel intensity distribution (VID), in the context of future observations
pro... | astro-ph_CO |
The Physics and Mass Assembly of distant galaxies with the E-ELT: One of the main science goal of the future European Extremely Large Telescope
will be to understand the mass assembly process in galaxies as a function of
cosmic time. To this aim, a multi-object, AO-assisted integral field
spectrograph will be required ... | astro-ph_CO |
Exploring the Impact of Microlensing on Gravitational Wave Signals:
Biases, Population Characteristics, and Prospects for Detection: In this study, we investigate the impact of microlensing on gravitational
wave (GW) signals in the LIGO$-$Virgo sensitivity band. Microlensing caused by
an isolated point lens, with (re... | astro-ph_CO |
Can varying the gravitational constant alleviate the tensions ?: Constraints on the cosmological concordance model parameters from observables
at different redshifts are usually obtained using the locally measured value of
the gravitational constant $G_N$. Here we relax this assumption, by considering
$G$ as a free par... | astro-ph_CO |
Quasi-periodical features in the distribution of Luminous Red Galaxies: A statistical analysis of radial distributions of Luminous Red Galaxies
(LRGs) from the Sloan Digital Sky Survey (SDSS DR7) catalogue within an
interval $0.16 \leq z \leq 0.47$ is carried out. We found that the radial
distribution of $\sim$ 106,000... | astro-ph_CO |
Full covariance of CMB and lensing reconstruction power spectra: CMB and lensing reconstruction power spectra are powerful probes of
cosmology. However they are correlated, since the CMB power spectra are lensed
and the lensing reconstruction is constructed using CMB multipoles. We perform
a full analysis of the auto- ... | astro-ph_CO |
A robust upper limit on N_eff from BBN, circa 2011: We derive here a robust bound on the effective number of neutrinos from
constraints on primordial nucleosynthesis yields of deuterium and helium. In
particular, our results are based on very weak assumptions on the astrophysical
determination of the helium abundance, ... | astro-ph_CO |
Modification of the halo mass function by kurtosis associated with
primordial non-Gaussianity: We study the halo mass function in the presence of the kurtosis type of
primordial non-Gaussianity. The kurtosis corresponds to the trispectrum as
defined in Fourier space. The primordial trispectrum is commonly characteriz... | astro-ph_CO |
Dusty MgII Absorbers: Implications for the GRB/Quasar Incidence
Discrepancy: There is nearly a factor of four difference in the number density of
intervening MgII absorbers as determined from gamma-ray burst (GRB) and quasar
lines of sight. We use a Monte-Carlo simulation to test if a dust extinction
bias can account... | astro-ph_CO |
Primordial power spectrum: a complete analysis with the WMAP nine-year
data: We have improved further the error sensitive Richardson-Lucy deconvolution
algorithm making it applicable directly on the un-binned measured angular power
spectrum of Cosmic Microwave Background observations to reconstruct the form of
the pr... | astro-ph_CO |
Fantasia of a Superfluid Universe -- In memory of Kerson Huang: This article introduces Kerson Huang's theory on superfluid universe in these
aspects: I. choose the asymptotically free Halpern-Huang scalar field(s) to
drive inflation; II. use quantum turbulence to create matter; III. consider
dark energy as the energy ... | astro-ph_CO |
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