178 citations · 401 across the 22 of their papers we have counts for
25 papers
The Binary Fraction of Milky Way Field Stars in DESI: Dependence on Chemical Abundance
Tian Qiu, Wenting Wang, Sergey E. Koposov +39
Binary populations encode information about the physical conditions of star formation and the subsequent evolution of stellar populations. Adopting a statistical method based on mu…
Field-level inference of growth rate from DESI BGS galaxy and ZTF supernova simulations
Corentin Ravoux, Bastien Carreres, Julian Bautista +60
Galaxy peculiar velocities are a powerful probe of the growth rate of structure at low redshifts (), measured through the combination . These constraints are imp…
Model-Independent Measurement of Baryon Gas Fractions through Galaxy-Galaxy Lensing and the Kinematic Sunyaev-Zel'dovich Effect
R. Henry Liu, Uroš Seljak, Simone Ferraro +52
Baryon feedback is a leading source of systematic uncertainty for cosmology from weak lensing, but measurements of the gas distribution around galaxies have largely relied on param…
Luminosity function of quasars at from SDSS and DESI
Gaocheng Yin, Linhua Jiang, Zhiwei Pan +54
We present a study of the evolution of type 1 quasars at , covering the peak epoch of quasar activity. The quasar evolution has been extensively explored by a variety of…
Cosmic Pairs: A DESI Census of Dual and Offset AGN as Precursors to Massive Black Hole Binaries
Ekaterine Dadiani, Antonella Palmese, Yihao Zhou +52
We present a systematic census of dual and offset active galactic nuclei (AGN) using spectroscopic data from the first data release (DR1) of the Dark Energy Spectroscopic Instrumen…
Stacked Reverberation Mapping of High Redshift Quasars in DESI. I. Feasibility Analysis
Rahma Alfarsy, R. E. A. Canning, Eva-Maria Mueller +49
The broad line region of quasars has long been probed by reverberation mapping techniques that measure time lags between continuum and broad emission line variations. Stacked rever…
Alleviating prior dependencies for DESI DR1 clustering fits through reparameterization
Marco Bonici, Simone Paradiso, Glenn McGee +48
Bayesian analyses of the full-shape clustering of Dark Energy Spectroscopic Instrument (DESI) Data Release 1 (DR1) exhibit prior-volume projection effects, whereby weakly constrain…
Disentangling the Distant Stellar Halo Using K-Giants in the DESI Year 3 Data
Namitha Kizhuprakkat, Andrew P. Cooper, Wenting Wang +42
We present a sample of 88,959 K-giants from DESI Milky Way Survey Year 3 data, which we use to characterize the chemo-dynamical properties of the stellar halo at Galactocentric dis…
ODIN: Spectroscopic Validation of Ly-Emitting Galaxy Samples with DESI
Ethan Pinarski, Govind Ramgopal, Nicole Firestone +65
The One-hundred-deg^2 DECam Imaging in Narrowbands (ODIN) survey is conducting the widest-field deep narrow-band imaging of the equatorial and southern skies. ODIN uses three custo…
Cosmological Bounce Relics: Black Holes, Gravitational Waves, and Dark Matter
Enrique Gaztanaga
We propose a new mechanism for generating cosmological relics -- black holes, gravitational waves (GWs), and possibly dark matter (DM) -- in a bouncing Universe. Relics arise throu…
A new understanding of Einstein-Rosen bridges
Enrique Gaztañaga, K. Sravan Kumar, João Marto
The formulation of quantum field theory in Minkowski spacetime, which emerges from the unification of special relativity and quantum mechanics, is based on treating time as a param…
Gravitational Bounce from the Quantum Exclusion Principle
Enrique Gaztanaga, K. Sravan Kumar, Swaraj Pradhan +1
We investigate the fully relativistic spherical collapse model of a uniform distribution of mass with initial comoving radius and spatial curvature $k \equiv 1/χ_k^2 \le…
Cold Collapse and Bounce of an FLRW Cloud
Swaraj Pradhan, Michael Gabler, Enrique Gaztañaga
We study the collapse of spherical cold clouds beyond black hole formation to investigate the possibility of a bounce in the in-falling matter when a critical density or pressure i…
The effect of quasar redshift errors on Lyman- forest correlation functions
Samantha Youles, Julian E. Bautista, Andreu Font-Ribera +30
Using synthetic Lyman- forests from the Dark Energy Spectroscopic Instrument (DESI) survey, we present a study of the impact of errors in the estimation of quasar redshift on th…
What Moves the Heavens Above?
Enrique Gaztanaga, Benjamin Camacho-Quevedo
The standard cosmological model () assumes that everything started in a singular Big Bang out of Cosmic Inflation, a mysterious form of modern Aether (the inflaton). Here we…
The Cosmological Constant as Event Horizon
Enrique Gaztanaga
General Relativity allows for a cosmological constant () which has inspired models of cosmic Inflation and Dark Energy. We show instead that corresponds to an…
A measurement of the scale of homogeneity in the Early Universe
Benjamin Camacho-Quevedo, Enrique Gaztañaga
We present the first measurement of the homogeneity index, , a fractal or Hausdorff dimension of the early Universe from the Planck CMB temperature variations in…
A peek outside our Universe
Enrique Gaztanaga, Pablo Fosalba
According to general relativity (GR), a universe with a cosmological constant , like ours, is trapped inside an event horizon, . What is outside? We show, using I…
Dark Energy Survey Year 3 Results: Point-Spread Function Modeling
M. Jarvis, G. M. Bernstein, A. Amon +79
We introduce a new software package for modeling the point-spread function (PSF) of astronomical images, called Piff (PSFs In the Full FOV), which we apply to the first three years…
Homogeneity and the causal boundary
Enrique Gaztanaga
A Universe with finite age also has a finite causal scale , so the metric can not be homogeneous for , as it is usually assumed. To account for this, we propose a new c…
The cosmological constant and the size of the Physical Universe
Enrique Gaztanaga
The cosmological constant is a free parameter in Einstein's equations of gravity. We propose to fix its value with a boundary condition: test particles should be free when outs…
Steve: A hierarchical Bayesian model for Supernova Cosmology
S. R. Hinton, T. M. Davis, A. G. Kim +66
We present a new Bayesian hierarchical model (BHM) named Steve for performing type Ia supernova (SNIa) cosmology fits. This advances previous works by including an improved treatme…
Cosmology from Cosmic Shear with DES Science Verification Data
The Dark Energy Survey Collaboration, T. Abbott, F. B. Abdalla +126
We present the first constraints on cosmology from the Dark Energy Survey (DES), using weak lensing measurements from the preliminary Science Verification (SV) data. We use 139 squ…
Wide-Field Lensing Mass Maps from DES Science Verification Data
C. Chang, V. Vikram, B. Jain +81
We present a mass map reconstructed from weak gravitational lensing shear measurements over 139 sq. deg from the Dark Energy Survey (DES) Science Verification data. The mass map pr…