T. Claybaugh
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View article: ODIN: Probing the LAE Ly <i>α</i> Luminosity Function across Cosmic Time and Different Environments
ODIN: Probing the LAE Ly <i>α</i> Luminosity Function across Cosmic Time and Different Environments Open
The ubiquity and relative ease of discovery make 2 ≲ z ≲ 5 Ly α emitting galaxies (LAEs) ideal tracers for large-scale structure of the distant Universe. In addition, because Ly α is a resonance line, but frequently observed at large equiv…
View article: Galaxy-Multiplet Clustering from DESI DR2
Galaxy-Multiplet Clustering from DESI DR2 Open
We present an efficient estimator for higher-order galaxy clustering using small groups of nearby galaxies, or multiplets. Using the Luminous Red Galaxy (LRG) sample from the Dark Energy Spectroscopic Instrument (DESI) Data Release 2, we i…
View article: Modelling the impact of quasar redshift errors on the full-shape analysis of correlations in the Lyman-α forest
Modelling the impact of quasar redshift errors on the full-shape analysis of correlations in the Lyman-α forest Open
In preparation for the first cosmological measurements from the full shape of the Lyman-$\alpha$ (Ly $\alpha$) forest from Dark Energy Spectroscopic Instrument (DESI), we must carefully model all relevant systematics that might bias our an…
View article: The Draco Dwarf Spheroidal Galaxy in the First Year of Dark Energy Spectroscopic Instrument Data
The Draco Dwarf Spheroidal Galaxy in the First Year of Dark Energy Spectroscopic Instrument Data Open
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). We identify 155 high-probability members of Draco using lin…
View article: A Comprehensive Characterization of Galaxy-cool CGM Connections at <i>z</i> < 0.4 with DESI Year 1 Data
A Comprehensive Characterization of Galaxy-cool CGM Connections at <i>z</i> < 0.4 with DESI Year 1 Data Open
We investigate the relationships between the cool circumgalactic medium (CGM), traced by Ca ii absorption lines, and galaxy properties at z < 0.4 using ∼900,000 galaxy–quasar pairs within 200 kpc from the Year 1 data of the Dark Energy Spe…
View article: Clustering of DESI galaxies split by thermal Sunyaev-Zeldovich effect
Clustering of DESI galaxies split by thermal Sunyaev-Zeldovich effect Open
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 galaxies. We propose to use the tSZ data to separate galaxies fro…
View article: Spectroscopic Characterization of redMaPPer Galaxy Clusters with DESI
Spectroscopic Characterization of redMaPPer Galaxy Clusters with DESI Open
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 front of and behind a galaxy cluster are mistakenly associa…
View article: Detection of supernova magnitude fluctuations induced by large-scale structure
Detection of supernova magnitude fluctuations induced by large-scale structure Open
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 structure and test the cosmological model. In this work, we measur…
View article: Enhancing Multiplet Alignment Measurements with Imaging
Enhancing Multiplet Alignment Measurements with Imaging Open
We demonstrate that measurements of the gravitational tidal field made with spectroscopic redshifts can be improved with information from imaging surveys. The average orientation of small groups of galaxies, or "multiplets" is correlated w…
View article: DESI Emission-line Galaxies: Clustering Dependence on Stellar Mass and [O <scp>II</scp>] Luminosity
DESI Emission-line Galaxies: Clustering Dependence on Stellar Mass and [O <span>II</span>] Luminosity Open
We measure the projected two-point correlation functions of emission-line galaxies (ELGs) from the Dark Energy Spectroscopic Instrument One-Percent Survey and model their dependence on stellar mass and [O II ] luminosity. We select ∼180,00…
View article: Cosmology from Planck CMB lensing and DESI DR1 quasar tomography
Cosmology from Planck CMB lensing and DESI DR1 quasar tomography Open
We present a measurement of the amplitude of matter fluctuations over the redshift range 0.8 ≤ z ≤ 3.5 from the cross correlation of over 1.2 million spectroscopic quasars selected by the Dark Energy Spectroscopic Instrument (DESI) across …
View article: DESI Strong Lens Foundry III: Keck Spectroscopy for Strong Lenses Discovered Using Residual Neural Networks
DESI Strong Lens Foundry III: Keck Spectroscopy for Strong Lenses Discovered Using Residual Neural Networks Open
We present spectroscopic data of strong lenses and their source galaxies using the Keck Near-Infrared Echellette Spectrometer (NIRES) and the Dark Energy Spectroscopic Instrument (DESI), providing redshifts necessary for nearly all strong-…
View article: Probing the limits of cosmological information from the Lyman-$α$ forest 2-point correlation functions
Probing the limits of cosmological information from the Lyman-$α$ forest 2-point correlation functions Open
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 correlation function on all scales. In this work, we present th…
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: Constraining primordial non-Gaussianity from the large scale structure two-point and three-point correlation functions
Constraining primordial non-Gaussianity from the large scale structure two-point and three-point correlation functions Open
Surveys of cosmological large-scale structure (LSS) are sensitive to the presence of local primordial non-Gaussianity (PNG), and may be used to constrain models of inflation. Local PNG, characterized by $f_{\mathrm{NL}}$, the amplitude of …
View article: STag. II. Classification of Serendipitous Supernovae Observed by Galaxy Redshift Surveys
STag. II. Classification of Serendipitous Supernovae Observed by Galaxy Redshift Surveys Open
With the number of supernovae observed expected to drastically increase thanks to large-scale surveys like the Dark Energy Spectroscopic Instrument (DESI), it is necessary that the tools we use to classify these objects keep up with this i…
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: Modified gravity constraints from the full shape modeling of clustering measurements from DESI 2024
Modified gravity constraints from the full shape modeling of clustering measurements from DESI 2024 Open
We present cosmological constraints on deviations from general relativity (GR) from the first-year of clustering observations from the Dark Energy Spectroscopic Instrument (DESI) in combination with other available datasets including the C…
View article: The effects of continuum fitting on Lyman-α forest correlations
The effects of continuum fitting on Lyman-α forest correlations Open
Correlations of fluctuations of the flux in Lyman-α forests of high-redshift quasars have been observed by the Baryonic Acoustic Oscillation Spectroscopy Survey (BOSS) and the Dark Energy Spectroscopy Instrument (DESI) survey where they ha…
View article: Missing components in ΛCDM from DESI Y1 baryonic acoustic oscillation measurements: Insights from redshift remapping
Missing components in ΛCDM from DESI Y1 baryonic acoustic oscillation measurements: Insights from redshift remapping Open
Aims. We explore transformations of the Friedman-Lemaître-Robertson-Walker (FLRW) metric and cosmological parameters that align with observational data while aiming to gain insights into potential extensions of standard cosmological models…
View article: Frequentist Cosmological Constraints from Full-Shape Clustering Measurements in DESI DR1
Frequentist Cosmological Constraints from Full-Shape Clustering Measurements in DESI DR1 Open
We perform a frequentist analysis using the standard profile likelihood method for clustering measurements from Data Release 1 of the Dark Energy Spectroscopic Instrument (DESI). While Bayesian inferences for Effective Field Theory models …
View article: The Compilation and Validation of the Spectroscopic Redshift Catalogs for the DESI-COSMOS and DESI-XMMLSS Fields
The Compilation and Validation of the Spectroscopic Redshift Catalogs for the DESI-COSMOS and DESI-XMMLSS Fields Open
Over several dedicated programs that include targets beyond the main cosmological samples, the Dark Energy Spectroscopic Instrument (DESI) collected spectra for 304,970 unique objects in two fields centered on the COSMOS and XMM-LSS fields…
View article: Study of the Connected Four-Point Correlation Function of Galaxies from DESI Data Release 1 Luminous Red Galaxy Sample
Study of the Connected Four-Point Correlation Function of Galaxies from DESI Data Release 1 Luminous Red Galaxy Sample Open
We present a measurement of the non-Gaussian four-point correlation function (4PCF) from the DESI DR1 Luminous Red Galaxy (LRG) sample. For the gravitationally induced parity-even 4PCF, we detect a signal with a significance of 14.7$σ$ usi…
View article: DESI EDR: Calibrating the Tully-Fisher Relationship with the DESI Peculiar Velocity Survey
DESI EDR: Calibrating the Tully-Fisher Relationship with the DESI Peculiar Velocity Survey Open
We calibrate the Tully-Fisher relation (TFR) with data from the DESI Peculiar Velocity (PV) Survey taken during the Survey Validation (SV) period of the DESI galaxy redshift survey. Placing spectroscopic fibers on the centers and major axe…
View article: Beyond traditional diagnostics: Identifying active galactic nuclei using spectral energy distribution fitting in DESI data
Beyond traditional diagnostics: Identifying active galactic nuclei using spectral energy distribution fitting in DESI data Open
Aims. Active galactic nuclei (AGN) are typically identified through their distinctive X-ray or radio emissions, mid-infrared (MIR) colors, or emission lines. However, each method captures different subsets of AGN due to signal-to-noise (S/…
View article: Mitigating imaging systematics for DESI 2024 emission Line Galaxies and beyond
Mitigating imaging systematics for DESI 2024 emission Line Galaxies and beyond Open
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 spurious correlations between target density and observing con…
View article: Cosmological implications of DESI DR2 BAO measurements in light of the latest ACT DR6 CMB data
Cosmological implications of DESI DR2 BAO measurements in light of the latest ACT DR6 CMB data Open
We report cosmological results from the Dark Energy Spectroscopic Instrument (DESI) measurements of baryon acoustic oscillations (BAO) when combined with recent data from the Atacama Cosmology Telescope (ACT). By jointly analyzing ACT and …
View article: Iron-corrected Single-epoch Black Hole Masses of DESI Quasars at Low Redshift
Iron-corrected Single-epoch Black Hole Masses of DESI Quasars at Low Redshift Open
We present a study on the possible overestimation of single-epoch supermassive black hole (SMBH) masses in previous works, based on more than 55,000 type 1 quasars at 0.25 < z < 0.8 from the Dark Energy Spectroscopic Instrument (DESI). We …
View article: Reconstructing Quasar Spectra and Measuring the Ly$α$ Forest with ${\rm S{\scriptsize pender}Q}$
Reconstructing Quasar Spectra and Measuring the Ly$α$ Forest with ${\rm S{\scriptsize pender}Q}$ Open
Quasar spectra carry the imprint of foreground intergalactic medium (IGM) through absorption features. In particular, absorption caused by neutral hydrogen gas, the ``Ly$α$ forest,'' is a key spectroscopic tracer for cosmological analyses …