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DESI 2024 VII: Cosmological Constraints from the Full-Shape Modeling of Clustering Measurements
DESI Collaboration, A. G. Adame, J. Aguilar +210
We present cosmological results from the measurement of clustering of galaxy, quasar and Lyman- forest tracers from the first year of observations with the Dark Energy Spectrosc…
DESI 2024 II: Sample Definitions, Characteristics, and Two-point Clustering Statistics
DESI Collaboration, A. G. Adame, J. Aguilar +200
We present the samples of galaxies and quasars used for DESI 2024 cosmological analyses, drawn from the DESI Data Release 1 (DR1). We describe the construction of large-scale struc…
The first identification of Lyman Changing-look Quasars at high-redshift in DESI
Wei-Jian Guo, Zhiwei Pan, Małgorzata Siudek +38
We present two cases of Ly changing-look (CL) quasars (J1306 and J1512) along with two additional candidates (J1511 and J1602), all discovered serendipitously at through…
Extensive analysis of reconstruction algorithms for DESI 2024 baryon acoustic oscillations
X. Chen, Z. Ding, E. Paillas +64
Reconstruction of the baryon acoustic oscillation (BAO) signal has been a standard procedure in BAO analyses over the past decade and has helped to improve the BAO parameter precis…
Modified Gravity Constraints from the Full Shape Modeling of Clustering Measurements from DESI 2024
M. Ishak, J. Pan, R. Calderon +68
We present cosmological constraints on deviations from general relativity (GR) from the first-year of clustering observations from Dark Energy Spectroscopic Instrument (DESI) in co…
Mitigating Imaging Systematics for DESI 2024 Emission Line Galaxies and Beyond
A. J. Rosado-Marín, A. J. Ross, H. Seo +56
Emission Line Galaxies (ELGs) are one of the main tracers that the Dark Energy Spectroscopic Instrument (DESI) uses to probe the universe. However, they are afflicted by strong spu…
Exploring HOD-dependent systematics for the DESI 2024 Full-Shape galaxy clustering analysis
N. Findlay, S. Nadathur, W. J. Percival +39
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…
DESI 2024 V: Full-Shape Galaxy Clustering from Galaxies and Quasars
A. G. Adame, J. Aguilar, S. Ahlen +195
We present the measurements and cosmological implications of the galaxy two-point clustering using over 4.7 million unique galaxy and quasar redshifts in the range divi…
DESI Peculiar Velocity Survey -- Fundamental Plane
Khaled Said, Cullan Howlett, Tamara Davis +52
The Dark Energy Spectroscopic Instrument (DESI) Peculiar Velocity Survey aims to measure the peculiar velocities of early and late type galaxies within the DESI footprint using bot…
Correcting Turbulence-induced Errors in Fiber Positioning for the Dark Energy Spectroscopic Instrument
E. F. Schlafly, J. Guy, K. Honscheid +37
Highly-multiplexed, robotic, fiber-fed spectroscopic surveys are observing tens of millions of stars and galaxies. For many systems, accurate positioning relies on imaging the fibe…
Fiducial-Cosmology-dependent systematics for the DESI 2024 BAO Analysis
A. Pérez-Fernández, L. Medina-Varela, R. Ruggeri +61
When measuring the Baryon Acoustic Oscillations (BAO) scale from galaxy surveys, one typically assumes a fiducial cosmology when converting redshift measurements into comoving dist…
Mitigation of DESI fiber assignment incompleteness effect on two-point clustering with small angular scale truncated estimators
M. Pinon, A. de Mattia, P. McDonald +50
We present a method to mitigate the effects of fiber assignment incompleteness in two-point power spectrum and correlation function measurements from galaxy spectroscopic surveys,…
The clustering of Lyman Alpha Emitting galaxies at z=2-3
M. White, A. Raichoor, Arjun Dey +52
We measure the clustering of Lyman Alpha Emitting galaxies (LAEs) selected from the One-hundred-square-degree DECam Imaging in Narrowbands (ODIN) survey, with spectroscopic follow-…
Blinding scheme for the scale-dependence bias signature of local primordial non-Gaussianity for DESI 2024
E. Chaussidon, A. de Mattia, C. Yèche +32
The next generation of spectroscopic surveys is expected to achieve an unprecedented level of accuracy in the measurement of cosmological parameters. To avoid confirmation bias and…
CMB lensing and Lyα forest cross bispectrum from DESI's first-year quasar sample
N. G. Karaçaylı, P. Martini, D. H. Weinberg +50
The squeezed cross-bispectrum \bispeconed\ between the gravitational lensing in the Cosmic Microwave Background and the 1D \lya\ forest power spectrum can constrain bias parameters…
Validation of the DESI 2024 Ly forest BAO analysis using synthetic datasets
Andrei Cuceu, Hiram K. Herrera-Alcantar, Calum Gordon +56
The first year of data from the Dark Energy Spectroscopic Instrument (DESI) contains the largest set of Lyman- (Ly) forest spectra ever observed. This data, collected in the…
Constraints on the spacetime variation of the fine-structure constant using DESI emission-line galaxies
Linhua Jiang, Zhiwei Pan, Jessica Nicole Aguilar +38
We present strong constraints on the spacetime variation of the fine-structure constant using the Dark Energy Spectroscopic Instrument (DESI). In this pilot work, we utilize $\…
Archetype-Based Redshift Estimation for the Dark Energy Spectroscopic Instrument Survey
Abhijeet Anand, Julien Guy, Stephen Bailey +46
We present a computationally efficient galaxy archetype-based redshift estimation and spectral classification method for the Dark Energy Survey Instrument (DESI) survey. The DESI s…
Candidate strongly lensed type Ia supernovae in the Zwicky Transient Facility archive
A. Townsend, J. Nordin, A. Sagués Carracedo +61
Gravitationally lensed type Ia supernovae (glSNe Ia) are unique astronomical tools that can be used to study cosmological parameters, distributions of dark matter, the astrophysics…
ELG Spectroscopic Systematics Analysis of the DESI Data Release 1
Jiaxi Yu, Ashley J. Ross, Antoine Rocher +58
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 l…
The Construction of Large-scale Structure Catalogs for the Dark Energy Spectroscopic Instrument
A. J. Ross, J. Aguilar, S. Ahlen +83
We present the technical details on how large-scale structure (LSS) catalogs are constructed from redshifts measured from spectra observed by the Dark Energy Spectroscopic Instrume…
Forward modeling fluctuations in the DESI LRGs target sample using image simulations
Hui Kong, Ashley J. Ross, Klaus Honscheid +50
We use the forward modeling pipeline, Obiwan, to study the imaging systematics of the Luminous Red Galaxies (LRGs) targeted by the Dark Energy Spectroscopic Instrument (DESI). We u…
New measurements of the Lyman- forest continuum and effective optical depth with LyCAN and DESI Y1 data
Wynne Turner, Paul Martini, Naim Göksel Karaçaylı +42
We present the Lyman- Continuum Analysis Network (LyCAN), a Convolutional Neural Network that predicts the unabsorbed quasar continuum within the rest-frame wavelength range of…
Production of Alternate Realizations of DESI Fiber Assignment for Unbiased Clustering Measurement in Data and Simulations
J. Lasker, A. Carnero Rosell, A. D. Myers +52
A critical requirement of spectroscopic large scale structure analyses is correcting for selection of which galaxies to observe from an isotropic target list. This selection is oft…