Publication
The DESI one-per cent survey: exploring the halo occupation distribution of luminous red galaxies and quasi-stellar objects with ABACUSSUMMIT
Publications associées (38)
Revealing galaxy candidates out to z similar to 16 with JWST observations of the lensing cluster SMACS0723
Jean-Paul Richard Kneib, Hakim Atek, Johan Richard
One of the main goals of the JWST is to study the first galaxies in the Universe. We present a systematic photometric analysis of very distant galaxies in the first JWST deep field towards the massive lensing cluster SMACS0723. As a result, we report the d ...
OXFORD UNIV PRESS2023Probing the nature of Dark Energy through the study of large scale structures using spectroscopic surveys and their simulations
Measurements of large-scale structure (LSS), as performed on the largest 3D map of over two million extragalactic sources from the Sloan Digital Sky Survey, together with measurements of the cosmic microwave background (CMB) anisotropies, are in complete a ...
EPFL2023The DESI Survey Validation: Results from Visual Inspection of Bright Galaxies, Luminous Red Galaxies, and Emission-line Galaxies
Yi Zhang, Stewart Cole, Anand Stéphane Raichoor, Arjun Dey
The Dark Energy Spectroscopic Instrument (DESI) Survey has obtained a set of spectroscopic measurements of galaxies to validate the final survey design and target selections. To assist in these tasks, we visually inspect DESI spectra of approximately 2500 ...
IOP Publishing Ltd2023Angular systematics-free cosmological analysis of galaxy clustering in configuration space
Cheng Zhao, Anand Stéphane Raichoor
Galaxy redshift surveys are subject to incompleteness and inhomogeneous sampling due to the various constraints inherent to spectroscopic observations. This can introduce systematic errors on the summary statistics of interest, which need to be mitigated i ...
OXFORD UNIV PRESS2022A machine learning approach to correct for mass resolution effects in simulated halo clustering statistics
Daniel Felipe Forero Sanchez, Cheng Zhao
The increase in the observed volume in cosmological surveys imposes various challenges on simulation preparations. First, the volume of the simulations required increases proportionally to the observations. However, large-volume simulations are quickly bec ...
OXFORD UNIV PRESS2022Euclid: Searching for pair-instability supernovae with the Deep Survey
Frédéric Courbin, Georges Meylan, Giovanni Longo, Yi Wang, Richard Massey
Pair-instability supernovae are theorized supernovae that have not yet been observationally confirmed. They are predicted to exist in low-metallicity environments. Because overall metallicity becomes lower at higher redshifts, deep near-infrared transient ...
EDP SCIENCES S A2022The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic correlation function between redshifts 0.6 and 1
Jean-Paul Richard Kneib, Cheng Zhao, Yuting Wang
We present the cosmological analysis of the configuration-space anisotropic clustering in the completed Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS) Data Release 16 galaxy sample. This sample consists of luminous red ...
OXFORD UNIV PRESS2021The GOGREEN survey: Internal dynamics of clusters of galaxies at redshift 0.9-1.4
Pascale Jablonka, Hung-Hsu Chan
Context. The study of galaxy cluster mass profiles (M(r)) provides constraints on the nature of dark matter and on physical processes affecting the mass distribution. The study of galaxy cluster velocity anisotropy profiles (beta (r)) informs the orbits of ...
EDP SCIENCES S A2021The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: N-body mock challenge for the eBOSS emission line galaxy sample
Cheng Zhao, Johan Comparat, Anand Stéphane Raichoor, Amélie Tamone
Cosmological growth can be measured in the redshift space clustering of galaxies targeted by spectroscopic surveys. Accurate prediction of clustering of galaxies will require understanding galaxy physics, which is a very hard and highly non-linear problem. ...
OXFORD UNIV PRESS2021The AGORA High-resolution Galaxy Simulations Comparison Project. III. Cosmological Zoom-in Simulation of a Milky Way-mass Halo
Yves Revaz, Loïc Hausammann, Alessandro Lupi
We present a suite of high-resolution cosmological zoom-in simulations to z = 4 of a 10(12) M (circle dot) halo at z = 0, obtained using seven contemporary astrophysical simulation codes (Art-I, Enzo, Ramses, Changa, Gadget-3, Gear, and Gizmo) widely used ...
IOP PUBLISHING LTD2021