A. Dey

Validation of the DESI DR2 Ly $α$ forest full-shape analysis

M. Herbold, A. Cuceu, P. Martini +100

We present the validation of the Dark Energy Spectroscopic Instrument (DESI) Data Release 2 (DR2) Lyman- $α$ (Ly $α$ ) forest full-shape analysis. This analysis combines three-dimensi…

DESI DR2 Results IV: Alcock-Paczyński Measurements from the Lyman Alpha Forest and Cosmological Constraints

DESI Collaboration, A. G. Adame, J. Aguilar +152

We present Alcock-Paczyński (AP) measurements from the full shape of Lyman- $α$ (Ly $α$ ) forest correlation functions measured from the second data release (DR2) of the Dark Energy S…

CoLoRe-2LPT: Lyman- $α$ mock catalogues for the validation of DESI cosmological analyses

M. F. Ruiz-Herrera Bernal, S. Avila, A. Font-Ribera +90

The Lyman- $α$ (Ly $α$ ) forest has become a crucial probe for studying the large-scale structure of the universe at high redshift ( $z > 2$ ), providing powerful constraints on Baryon…

Lyman- $α$ forest holography: 3D predictions from 1D measurements

J. Chaves-Montero, A. Font-Ribera, J. Aguilar +68

Cosmological analyses of Lyman- $α$ forest clustering rely on either one-dimensional correlations along individual sightlines or three-dimensional correlations between different sig…

The 3D clustering of Lyman Alpha Emitters measured with DESI

Haruki Ebina, Martin J. White, Rongpu Zhou +44

We present a clustering analysis of Lyman- $α$ emitters (LAEs) using spectroscopic observations from the Dark Energy Spectroscopic Instrument (DESI) of candidates selected from the…

Precision Kinematic Sunyaev--Zel'dovich Measurements Across Halo Mass and Redshift with DESI DR2 and ACT DR6: Part II. Bright Galaxy Survey and Emission-Line Galaxies

B. Hadzhiyska, S. Ferraro, F. J. Qu +50

We present the first high-significance spectroscopic stacked kinetic Sunyaev-Zel'dovich (kSZ) measurements of circumgalactic gas profiles for both Bright Galaxy Survey (BGS) and Em…

A Natural $≳ 100 \times$ Telescope: Discovery of the Strongly Lensed Type II SN 2025mkn at $z = 1.37$

Cameron Lemon, Ariel Goobar, Joel Johansson +90

We present the discovery of SN 2025mkn, a gravitationally lensed Type II supernova. First detected as a blue transient in ZTF, 0.83 $^{''}$ from a $z = 0.42$ elliptical gala…

Cosmological constraints from a joint DESI DR1 Full-Shape and DR2 BAO

D. Forero-Sánchez, H. Gil-Marín, L. Verde +61

We present a cosmological analysis combining full-shape (FS) clustering measurements from the Dark Energy Spectroscopic Instrument (DESI) DR1 with baryon acoustic oscillation (BAO)…

Baryon Acoustic Oscillations from the C IV Forest with DESI DR2

Abby Bault, Andrei Cuceu, Julien Guy +53

We present a measurement of Baryon Acoustic Oscillations (BAO) in the cross-correlation of triply ionized carbon C IV absorption with the positions of quasars (QSO) and Emission Li…

The Linear Point Standard Ruler with DESI DR1 and DR2 Data

N. Uberoi, F. Nikakhtar, N. Padmanabhan +45

The linear point, a purely geometric feature in the monopole of the two-point correlation function, has been proposed as an alternative standard ruler. Compared to the peak in the…

Probing the environment around GW170817 with DESI: insights on galaxy group peculiar velocities for standard siren measurements

A. J. Amsellem, A. Palmese, K. Douglass +56

We present a new measurement of the Hubble constant, $H_{0}$ , following the gravitational wave event GW170817 and Dark Energy Spectroscopic Instrument (DESI) observations. A standard…

Probing cosmic velocities with the pairwise kinematic Sunyaev-Zel'dovich signal in DESI Bright Galaxy Sample DR1 and ACT DR6

B. Hadzhiyska, Y. Gong, Y. Hsu +55

We present a measurement of the pairwise kinematic Sunyaev-Zel'dovich (kSZ) signal using the Dark Energy Spectroscopic Instrument (DESI) Bright Galaxy Sample (BGS) Data Release 1 (…

Validation of the DESI-DR1 3x2-pt analysis: scale cut and shear ratio tests

N. Emas, A. Porredon, C. Blake +54

Combined survey analyses of galaxy clustering and weak gravitational lensing (3x2-pt studies) will allow new and accurate tests of the standard cosmological model. However, careful…

DESI Strong Lens Foundry II: DESI Spectroscopy for Strong Lens Candidates

Xiaosheng Huang, Jose Carlos Inchausti, Christopher J. Storfer +59

We present the Dark Energy Spectroscopic Instrument (DESI) Strong Lensing Secondary Target Program. This is a spectroscopic follow-up program for strong gravitational lens candidat…

Clustering analysis of medium-band selected high-redshift galaxies

H. Ebina, M. White, A. Raichoor +57

Next-generation large-scale structure spectroscopic surveys will probe cosmology at high redshifts $(2.3 < z < 3.5)$ , relying on abundant galaxy tracers such as Ly $α$ emitters (LAE…

Fiducial-Cosmology-dependent systematics for the DESI 2024 Full-Shape Analysis

R. Gsponer, S. Ramirez-Solano, F. Rodríguez-Martínez +65

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…

Strong Lens Discoveries in DESI Legacy Imaging Surveys DR10 with Two Deep Learning Architectures

Jose Carlos Inchausti, Christopher J. Storfer, Xiaosheng Huang +11

We have conducted a search for strong gravitational lensing systems in the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys Data Release 10 (DR10). This paper is…

Clustering of DESI galaxies split by thermal Sunyaev-Zeldovich effect

M. Rashkovetskyi, D. J. Eisenstein, J. Aguilar +46

The thermal Sunyaev-Zeldovich (tSZ) effect is associated with galaxy clusters - extremely large and dense structures tracing the dark matter with a higher bias than isolated galaxi…

The Lyman- $α$ Forest from LBGs: First 3D Correlation Measurement with DESI and Prospects for Cosmology

Hiram K. Herrera-Alcantar, Eric Armengaud, Christophe Yèche +50

The Lyman- $α$ (Ly $α$ ) forest is a key tracer of large-scale structure at redshifts z > 2, traditionally studied using spectra of quasars. Here, we explore the viability Lyman Break…

Lensing Without Borders: Measurements of galaxy-galaxy lensing and projected galaxy clustering in DESI DR1

S. Heydenreich, A. Leauthaud, C. Blake +64

We present Galaxy-Galaxy Lensing measurements obtained by cross-correlating spectroscopically observed galaxies from the first data release of the Dark Energy Spectroscopic Instrum…

Spectroscopic Characterization of redMaPPer Galaxy Clusters with DESI

J. Myles, D. Gruen, T. Jeltema +44

Optical galaxy cluster identification algorithms such as redMaPPer promise to enable an array of astrophysical and cosmological studies, but suffer from biases whereby galaxies in…

DESI DR1 Lyα 1D power spectrum: The Fast Fourier Transform estimator measurement

Corentin Ravoux, Marie-Lynn Abdul-Karim, Jean-Marc Le Goff +64

We present the one-dimensional Lyman- $α$ forest power spectrum measurement derived from the data release 1 (DR1) of the Dark Energy Spectroscopic Instrument (DESI). The measurement…

DESI DR1 Ly $α$ 1D power spectrum: The optimal estimator measurement

N. G. Karaçaylı, P. Martini, J. Aguilar +61

The one-dimensional power spectrum $P_{1D}$ of Ly $α$ forest offers rich insights into cosmological and astrophysical parameters, including constraints on the sum of neutri…