DESI Emission-line Galaxies: Clustering Dependence on Stellar Mass and [O <scp>II</scp>] Luminosity

Abstract 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 ∼180,000 ELGs with redshifts of 0.8 &lt; z &lt; 1.6, and define 27 samples according to cuts in redshift and both galaxy properties. Following a framework that describes the conditional [O II ] luminosity–stellar mass distribution as a function of halo mass, we simultaneously model the clustering measurements of all samples at fixed redshift. Based on the modeling result, most ELGs in our samples are classified as central galaxies, residing in halos of a narrow mass range with a typical median of ∼10 12.2−12.4 h −1 M ⊙ . We observe a weak dependence of clustering amplitude on stellar mass, which is reflected in the model constraints and is likely a consequence of the 0.5 dex measurement uncertainty in the stellar mass estimates. The model shows a trend between galaxy bias and [O II ] luminosity at high redshift (1.2 &lt; z &lt; 1.6) that is otherwise absent at lower redshifts.

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Publication Details

Journal
The Astrophysical Journal
Published
2025-10-09
DOI
https://doi.org/10.3847/1538-4357/ae0036
Primary Topic
Galaxies: Formation, Evolution, Phenomena
Type
article
Field-Weighted Citation Impact
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article

DESI Emission-line Galaxies: Clustering Dependence on Stellar Mass and [O II] Luminosity

D. Brooks, Rongpu Zhou, S. Juneau, M Schubnell et al.
The Astrophysical Journal
Galaxies: Formation, Evolution, Phenomena
article

DESI Emission-line Galaxies: Clustering Dependence on Stellar Mass and [O II] Luminosity

D. Brooks, Rongpu Zhou, S. Juneau, M Schubnell, Francisco Javier Castander, N. Palanque‐Delabrouille, S. Nadathur, Violeta González-Pérez, Gregory Tarlé, Andreu Font-Ribera, Laurent Le Guillou, David Sprayberry, D. Bianchi, David J. Schlegel, Ignasi Pérez-Ràfols, Axel de la Macorra, Martin Landriau, Simone Ferraro, M. E. Levi, Marc Manera, J. Aguilar, G. Gutierrez, Anthony Kremin, Eusebio Sanchez, Satya Gontcho A Gontcho, Ashley J. Ross, S. BenZvi, Alexie Leauthaud, ChangHoon Hahn, K. Honscheid, Andrei Cuceu, Joseph Harry Silber, B. A. Weaver, Shun Saito, J. E. Forero-Romero, Steven P. Ahlen, Aaron Meisner, R. Miquel, Theodore S. Kisner, R. Kehoe, John Moustakas, Mustapha Ishak, Zheng Zheng, C. Lamman, K. S. Dawson, Hu Zou, T. Claybaugh, Graziano Rossi, P. Doel, E. Gaztañaga, F. Prada, T. W. Hagen
article en

Abstract

Abstract 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 ∼180,000 ELGs with redshifts of 0.8 &lt; z &lt; 1.6, and define 27 samples according to cuts in redshift and both galaxy properties. Following a framework that describes the conditional [O II ] luminosity–stellar mass distribution as a function of halo mass, we simultaneously model the clustering measurements of all samples at fixed redshift. Based on the modeling result, most ELGs in our samples are classified as central galaxies, residing in halos of a narrow mass range with a typical median of ∼10 12.2−12.4 h −1 M ⊙ . We observe a weak dependence of clustering amplitude on stellar mass, which is reflected in the model constraints and is likely a consequence of the 0.5 dex measurement uncertainty in the stellar mass estimates. The model shows a trend between galaxy bias and [O II ] luminosity at high redshift (1.2 &lt; z &lt; 1.6) that is otherwise absent at lower redshifts.

The Astrophysical JournalVol. 992(1)
Boston University (US), Institució Catalana de Recerca i Estudis Avançats (ES), Universidad Complutense de Madrid (ES), Universitat Autònoma de Barcelona (ES), Centre National de la Recherche Scientifique (FR), Fermi National Accelerator Laboratory (US), Institute of Space Sciences (ES), University of Arizona (US), Lawrence Berkeley National Laboratory (US), State Street (United States) (US), Universidad de Los Andes (CO), The University of Texas at Dallas (US), Southern Methodist University (US), University of California, Santa Cruz (US), Institute for High Energy Physics (ES), University of Milan (IT), Chinese Academy of Sciences (CN), Missouri University of Science and Technology (US), University of Utah (US), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université Paris-Saclay (FR), University of Michigan (US), Brera Astronomical Observatory (IT), Sejong University (KR), Sorbonne Université (FR), Institut d'Estudis Espacials de Catalunya (ES), Laboratoire de Physique Nucléaire et de Hautes Énergies (FR), Center for Astrophysics Harvard & Smithsonian (US), CEA Paris-Saclay (FR), Institut National de Physique Nucléaire et de Physique des Particules (FR), Community Science and Data Center (US), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (IT), NSF NOIRLab (US), Instituto de Astrofísica de Andalucía (ES), National Astronomical Observatories (CN), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (ES), University College London (GB), The Ohio State University (US), University of Rochester (US), University of Portsmouth (GB), Universidad Autónoma de Madrid (ES), Universidad Nacional Autónoma de México (MX), Siena College (US), University of California, Berkeley (US), Universitat Politècnica de Catalunya (ES)
Openalex Percentile: Top 80%
Galaxies: Formation, Evolution, Phenomena
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