A. Rocher
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View article: The 4MOST-Cosmology Redshift Survey: target selection of bright galaxies and luminous red galaxies
The 4MOST-Cosmology Redshift Survey: target selection of bright galaxies and luminous red galaxies Open
The Cosmology Redshift Survey of the 4-metre Multi-Object Spectroscopic Telescope (4MOST-CRS) will provide redshift measurements of galaxies and quasars over 5800 $\rm {deg^{2}}$ in the Southern hemisphere. As targets for the 4MOST-CRS, we…
View article: Enhancing DESI DR1 full-shape analyses using HOD-informed priors
Enhancing DESI DR1 full-shape analyses using HOD-informed priors Open
We present an analysis of DESI Data Release 1 (DR1) that incorporates Halo Occupation Distribution (HOD)-informed priors into Full-Shape (FS) modeling of the power spectrum based on cosmological perturbation theory (PT). By leveraging phys…
View article: 4MOST Cosmology Redshift Survey (CRS): Clustering properties of CRS BG and LRG target catalogues
4MOST Cosmology Redshift Survey (CRS): Clustering properties of CRS BG and LRG target catalogues Open
The 4MOST Cosmology Redshift Survey (CRS) will obtain nearly 5.4 million spectroscopic redshifts over $\sim5700$\,deg$^2$ to map large-scale structure and enable measurements of baryon acoustic oscillations (BAOs), growth rates via redshif…
View article: Fiducial-Cosmology-dependent systematics for the DESI 2024 Full-Shape Analysis
Fiducial-Cosmology-dependent systematics for the DESI 2024 Full-Shape Analysis Open
We assess the impact of the fiducial cosmology choice on cosmological inference from full-shape (FS) fits of the galaxy power spectrum in the DESI 2024 Data Release 1 (DR1). Using a suite of AbacusSummit DR1 mock catalogues based on the Pl…
View article: Exploring HOD-dependent systematics for the DESI 2024 Full-Shape galaxy clustering analysis
Exploring HOD-dependent systematics for the DESI 2024 Full-Shape galaxy clustering analysis Open
We analyse the robustness of the DESI 2024 cosmological inference from the full shape of the galaxy power spectrum to uncertainties in the Halo Occupation Distribution (HOD) model of the galaxy-halo connection and the choice of priors on n…
View article: The Impact of Spectroscopic Redshift Errors on Cosmological Measurements
The Impact of Spectroscopic Redshift Errors on Cosmological Measurements Open
Spectroscopic redshift errors, including redshift uncertainty and catastrophic failures, can bias cosmological measurements from galaxy redshift surveys at sub-percent level. In this work, we investigate their impact on the full-shape anal…
View article: The 4MOST-Cosmology Redshift Survey: Target Selection of Bright Galaxies and Luminous Red Galaxies
The 4MOST-Cosmology Redshift Survey: Target Selection of Bright Galaxies and Luminous Red Galaxies Open
The Cosmology Redshift Survey of the 4-metre Multi-Object Spectroscopic Telescope (4MOST-CRS) will provide redshift measurements of galaxies and quasars over 5700{\degsq} in the southern hemisphere. As targets for the 4MOST-CRS, we present…
View article: DESI DR2 reference mocks: clustering results from Uchuu-BGS and LRG
DESI DR2 reference mocks: clustering results from Uchuu-BGS and LRG Open
The aim of this work is to construct mock galaxy catalogues that accurately reproduce the redshift evolution of galaxy number density, clustering statistics, and baryonic properties, such as stellar mass for luminous red galaxies (LRGs) an…
View article: Unraveling emission line galaxy conformity at <i>z</i> ∼ 1 with DESI early data
Unraveling emission line galaxy conformity at <i>z</i> ∼ 1 with DESI early data Open
Emission line galaxies (ELGs) are now the preeminent tracers of large-scale structure at $z > 0.8$ due to their high density and strong emission lines, which enable accurate redshift measurements. However, relatively little is known abo…
View article: An analysis of parameter compression and Full-Modeling techniques with Velocileptors for DESI 2024 and beyond
An analysis of parameter compression and Full-Modeling techniques with Velocileptors for DESI 2024 and beyond Open
In anticipation of forthcoming data releases of current and future spectroscopic surveys, we present the validation tests and analysis of systematic effects within velocileptors modeling pipeline when fitting mock data from the AbacusSummi…
View article: Comparing Compressed and Full-Modeling analyses with FOLPS: implications for DESI 2024 and beyond
Comparing Compressed and Full-Modeling analyses with FOLPS: implications for DESI 2024 and beyond Open
The Dark Energy Spectroscopic Instrument (DESI) will provide unprecedented information about the large-scale structure of our Universe. In this work, we study the robustness of the theoretical modelling of the power spectrum of Folps , a n…
View article: A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys
A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys Open
In preparation for the next generation of galaxy redshift surveys, and in particular the year-one data release from the Dark Energy Spectroscopic Instrument (DESI), we investigate the consistency of a variety of effective field theory mode…
View article: Fiducial-cosmology-dependent systematics for the DESI 2024 BAO analysis
Fiducial-cosmology-dependent systematics for the DESI 2024 BAO analysis Open
When measuring the Baryon Acoustic Oscillations (BAO) scale from galaxy surveys, one typically assumes a fiducial cosmology when converting redshift measurements into comoving distances and also when defining input parameters for the recon…
View article: HOD-dependent systematics for luminous red galaxies in the DESI 2024 BAO analysis
HOD-dependent systematics for luminous red galaxies in the DESI 2024 BAO analysis Open
In this paper, we present the estimation of systematics related to the halo occupation distribution (HOD) modeling in the baryon acoustic oscillations (BAO) distance measurement of the Dark Energy Spectroscopic Instrument (DESI) 2024 analy…
View article: ELG spectroscopic systematics analysis of the DESI Data Release 1
ELG spectroscopic systematics analysis of the DESI Data Release 1 Open
Dark Energy Spectroscopic Instrument (DESI) uses more than 2.4 million Emission Line Galaxies (ELGs) for 3D large-scale structure (LSS) analyses in its Data Release 1 (DR1). Such large statistics enable thorough research on systematic unce…
View article: HOD-dependent systematics in Emission Line Galaxies for the DESI 2024 BAO analysis
HOD-dependent systematics in Emission Line Galaxies for the DESI 2024 BAO analysis Open
The Dark Energy Spectroscopic Instrument (DESI) will provide precise measurements of Baryon Acoustic Oscillations (BAO) to constrain the expansion history of the Universe and set stringent constraints on dark energy. Therefore, precise con…
View article: MUltiplexed Survey Telescope: Perspectives for Large-Scale Structure Cosmology in the Era of Stage-V Spectroscopic Survey
MUltiplexed Survey Telescope: Perspectives for Large-Scale Structure Cosmology in the Era of Stage-V Spectroscopic Survey Open
The MUltiplexed Survey Telescope (MUST) is a 6.5-meter telescope under development. Dedicated to highly-multiplexed, wide-field spectroscopic surveys, MUST observes over 20,000 targets simultaneously using 6.2-mm pitch positioning robots w…
View article: Impact of assembly bias on clustering plus weak lensing cosmological analysis
Impact of assembly bias on clustering plus weak lensing cosmological analysis Open
Context . Empirical models of galaxy-halo connection such as the halo occupation distribution (HOD) model have been widely used over the past decades to intensively test perturbative models on quasi-linear scales. However, these models fai…
View article: Comparing Compressed and Full-modeling Analyses with FOLPS: Implications for DESI 2024 and beyond
Comparing Compressed and Full-modeling Analyses with FOLPS: Implications for DESI 2024 and beyond Open
The Dark Energy Spectroscopic Instrument (DESI) will provide unprecedented information about the large-scale structure of our Universe. In this work, we study the robustness of the theoretical modelling of the power spectrum of FOLPS, a no…
View article: A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys
A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys Open
In preparation for the next generation of galaxy redshift surveys, and in particular the year-one data release from the Dark Energy Spectroscopic Instrument (DESI), we investigate the consistency of a variety of effective field theory mode…
View article: The DESI one-per cent survey: exploring the halo occupation distribution of luminous red galaxies and quasi-stellar objects with <scp>AbacusSummit</scp>
The DESI one-per cent survey: exploring the halo occupation distribution of luminous red galaxies and quasi-stellar objects with <span>AbacusSummit</span> Open
We present the first comprehensive halo occupation distribution (HOD) analysis of the Dark Energy Spectroscopic Instrument (DESI) One-Percent Survey luminous red galaxy (LRG) and Quasi Stellar Object (QSO) samples. We constrain the HOD of …
View article: Impact of assembly bias on clustering plus weak lensing cosmological\n analysis
Impact of assembly bias on clustering plus weak lensing cosmological\n analysis Open
Analytical models of galaxy-halo connection such as the Halo Occupation\nDistribution (HOD) model have been widely used over the past decades as a means\nto intensively test perturbative models on quasi-linear scales. However, these\nmodel…
View article: The DESI One-Percent Survey: exploring a generalized SHAM for multiple tracers with the UNIT simulation
The DESI One-Percent Survey: exploring a generalized SHAM for multiple tracers with the UNIT simulation Open
We perform SubHalo Abundance Matching (SHAM) studies on UNIT simulations with {σ, Vceil, vsmear}-SHAM and {σ, Vceil, fsat}-SHAM. They are designed to reproduce the clustering on 5–30 $\, {\, h^{-1}\, {\rm Mpc}}$ of luminous red galaxies (L…
View article: Unraveling emission line galaxy conformity at z~1 with DESI early data
Unraveling emission line galaxy conformity at z~1 with DESI early data Open
Emission line galaxies (ELGs) are now the preeminent tracers of large-scale structure at z>0.8 due to their high density and strong emission lines, which enable accurate redshift measurements. However, relatively little is known about ELG …
View article: The DESI One-Percent survey: exploring the Halo Occupation Distribution of Emission Line Galaxies with AbacusSummit simulations
The DESI One-Percent survey: exploring the Halo Occupation Distribution of Emission Line Galaxies with AbacusSummit simulations Open
The One-Percent survey of the Dark Energy Spectroscopic Instrument collected ∼ 270 k emission line galaxies (ELGs) at 0.8 < z < 1.6. The high completeness of the sample allowed the clustering to be measured down to scales never probed befo…
View article: The DESI One-Percent Survey: Exploring the Halo Occupation Distribution of Luminous Red Galaxies and Quasi-Stellar Objects with AbacusSummit
The DESI One-Percent Survey: Exploring the Halo Occupation Distribution of Luminous Red Galaxies and Quasi-Stellar Objects with AbacusSummit Open
We present the first comprehensive Halo Occupation Distribution (HOD) analysis of the DESI One-Percent survey Luminous Red Galaxy (LRG) and Quasi-Stellar Object (QSO) samples. We constrain the HOD of each sample and test possible HOD exten…
View article: The DESI One-Percent Survey: Exploring A Generalized SHAM for Multiple Tracers with the UNIT Simulation
The DESI One-Percent Survey: Exploring A Generalized SHAM for Multiple Tracers with the UNIT Simulation Open
We perform SubHalo Abundance Matching (SHAM) studies on UNIT simulations with \{$σ, V_{\rm ceil}, v_{\rm smear}$\}-SHAM and \{$σ, V_{\rm ceil},f_{\rm sat}$\}-SHAM. They are designed to reproduce the clustering on 5--30$\,\hmpc$ of Luminous…
View article: The DESI One-Percent survey: exploring the Halo Occupation Distribution of Emission Line Galaxies with AbacusSummit simulations
The DESI One-Percent survey: exploring the Halo Occupation Distribution of Emission Line Galaxies with AbacusSummit simulations Open
The One-Percent survey of the Dark Energy Spectroscopic Instrument collected ~ 270k emission line galaxies (ELGs) at 0.8 < z < 1.6. The high completeness of the sample allowed the clustering to be measured down to scales never probed befor…
View article: Halo Occupation Distribution of Emission Line Galaxies: fitting method with Gaussian Processes
Halo Occupation Distribution of Emission Line Galaxies: fitting method with Gaussian Processes Open
The halo occupation distribution (HOD) framework is an empirical method to describe the connection between dark matter halos and galaxies, which is constrained by small scale clustering data. Efficient fitting procedures are required to sc…