R. Zhou

The Power of DESI for Photometric Redshift Calibration: A Case Study with KiDS-1000

Diana Blanco, Alexie Leauthaud, Johannes Ulf Lange +64

Accurate redshift estimates are a critical requirement for weak lensing surveys and one of the main uncertainties in constraints on dark energy and large-scale cosmic structure. In…

Clustering redshift distribution calibration of weak lensing surveys using the DESI-DR1 spectroscopic dataset

R. Ruggeri, C. Blake, J. Aguilar +63

We estimate the source redshift distribution of current weak lensing surveys by applying the clustering-based redshift calibration technique, using the galaxy redshift sample provi…

Cosmological Constraints from Full-Scale Clustering and Galaxy-Galaxy Lensing with DESI DR1

Johannes U. Lange, Alexandra Wells, Andrew Hearin +76

We present constraints on cosmic structure growth from the analysis of galaxy clustering and galaxy--galaxy lensing with galaxies from the Dark Energy Spectroscopic Instrument (DES…

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…

Constraining primordial non-Gaussianity from DESI DR1 quasars and Planck PR4 CMB Lensing

Sofia Chiarenza, Alex Krolewski, Marco Bonici +54

We present the first measurement of local-type primordial non-Gaussianity from the cross-correlation between $1.2$ million spectroscopically confirmed quasars from the first data r…

Joint cosmological fits to DESI-DR1 full-shape clustering and weak gravitational lensing in configuration space

A. Semenaite, C. Blake, A. Porredon +69

We present a joint $3 \times 2$ -pt cosmological analysis of auto- and cross-correlations between the Dark Energy Spectroscopic Instrument Data Release 1 (DESI-DR1) Bright Galaxy Surv…

astro-ph.CO2025★ 2 cited

DESI-DR1 $3 \times 2$ -pt analysis: consistent cosmology across weak lensing surveys

A. Porredon, C. Blake, J. U. Lange +70

We present a joint cosmological analysis of projected galaxy clustering observations from the Dark Energy Spectroscopic Instrument Data Release 1 (DESI-DR1), and overlapping weak g…

The Multi-Phase Circumgalactic Medium of DESI Emission-Line Galaxies at z~1.5

Ting-Wen Lan, J. Xavier Prochaska, J. Aguilar +39

We study the multi-phase circumgalactic medium (CGM) of emission line galaxies (ELGs) at $z \sim 1.5$ , traced by MgII $λ 2796$ , $λ 2803$ and CIV $λ 1548$ , $λ 1550$ …

DESI DR2 Galaxy Luminosity Functions

Samuel G. Moore, Shaun Cole, Michael Wilson +54

We present galaxy luminosity functions (LFs) for the Dark Energy Spectroscopic Instrument (DESI) DR2 Bright Galaxy Survey (BGS) in the g,r,z, and w1 bands over 0.002<z<0.6. Our ana…

astro-ph.HE2025

AT2025ulz and S250818k: Leveraging DESI spectroscopy in the hunt for a kilonova associated with a sub-solar mass gravitational wave candidate

Xander J. Hall, Antonella Palmese, Brendan O'Connor +47

On August 18th, 2025, the LIGO--Virgo--KAGRA collaboration reported a sub-threshold gravitational wave candidate detection consistent with a sub-solar-mass neutron star merger, den…

astro-ph.HE2025★ 12 cited

Direct Measurement of Galaxy Assembly Bias using DESI DR1 Data

Zhiwei Shao, Ying Zu, Andrés N. Salcedo +54

We report the first direct measurement of galaxy assembly bias, a critical systematic in cosmology, from the Dark Energy Spectroscopic Instrument (DESI) Bright Galaxy Survey. We in…

Counterpart identification and classification for eRASS1 and characterisation of the AGN content

M. Salvato, J. Wolf, T. Dwelly +44

[abridged] Accurately accounting for the AGN phase in galaxy evolution requires a large, clean AGN sample. This is now possible with SRG/eROSITA. The public Data Release 1 (DR1, Ja…

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 (…

astro-ph.GA2025★ 1 cited

Dwarf galaxy halo masses from spectroscopic and photometric lensing in DESI and DES

Helena Treiber, Alexandra Amon, Risa H. Wechsler +46

We present the most precise and lowest-mass weak lensing measurements of dwarf galaxies to date, enabled by spectroscopic lenses from the Dark Energy Spectroscopic Instrument (DESI…

The Draco Dwarf Spheroidal Galaxy in the First Year of DESI Data

J. Ding, C. Rockosi, Ting S. Li +40

We investigate the spatial distribution, kinematics, and metallicity of stars in the Draco dwarf spheroidal galaxy using data from the Dark Energy Spectroscopic Instrument (DESI).…

astro-ph.CO2025★ 4 cited

$H_{0}$ Without the Sound Horizon (or Supernovae): A 2% Measurement in DESI DR1

E. A. Zaborowski, P. Taylor, K. Honscheid +58

The sound horizon scale $r_{s}$ is a key source of information for early-time $H_{0}$ measurements, and is therefore a common target of new physics proposed to solve the Hubble tension…

Detection of supernova magnitude fluctuations induced by large-scale structure

A. Nguyen, C. Blake, R. J. Turner +56

The peculiar velocities of supernovae and their host galaxies are correlated with the large-scale structure of the Universe, and can be used to constrain the growth rate of structu…

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…

A New Way to Discover Strong Gravitational Lenses: Pair-wise Spectroscopic Search from DESI DR1

Yuan-Ming Hsu, Xiaosheng Huang, Christopher J. Storfer +47

We present a new method to search for strong gravitational lensing systems by pairing spectra that are close together on the sky in a spectroscopic survey. We visually inspect 26,6…

astro-ph.CO2025★ 2 cited

DESI DR1 Ly $α$ forest: 3D full-shape analysis and cosmological constraints

Andrei Cuceu, Hiram K. Herrera-Alcantar, Calum Gordon +75

We perform an analysis of the full shapes of Lyman- $α$ (Ly $α$ ) forest correlation functions measured from the first data release (DR1) of the Dark Energy Spectroscopic Instrument (…

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…

Probing the limits of cosmological information from the Lyman- $α$ forest 2-point correlation functions

Wynne Turner, Andrei Cuceu, Paul Martini +48

The standard cosmological analysis with the Ly $α$ forest relies on a continuum fitting procedure that suppresses information on large scales and distorts the three-dimensional corr…