Year: 2026
Type: article
Abstract: Ly α emitters (LAEs) are star-forming galaxies with significant Ly α emission and are often used as tracers of large-scale structure at high redshift. We explore the relationship between the Ly α line profile and environmental density with spectroscopy from the Dark Energy Spectroscopic Instrument (DESI) of LAEs selected with narrowband photometry through the One-hundred-deg 2 DECam Imaging in Narrowbands (ODIN) survey. We use LAE surface density maps in the N419 ( z ∼ 2.45) and N501 ( z ∼ 3.12) narrow bands to probe the relationship between local environmental density and the Ly α line profile. In both narrow bands, we stack the LAE spectra in bins of environmental density and inside and outside of protocluster regions. The N501 data show ∼15% higher Ly α line luminosity for galaxies in protoclusters, suggesting increased star formation in these regions. However, the line luminosity is not appreciably greater in protocluster galaxies in the N419 band, suggesting a potential redshift evolution of this effect. The shape of the line profile itself does not vary with environmental density, suggesting that line shape changes are caused by local effects independent of a galaxy’s environment. These data indicate a potential relationship between LAE local environmental density, ionized gas distribution, and Ly α line luminosity.
Source: The Astrophysical Journal
Authors: Ana Sofía M. Uzsoy, Arjun Dey, Anand Raichoor, Douglas P. Finkbeiner, Vandana Ramakrishnan, Kyoung-Soo Lee, Eric Gawiser, Jessica Nicole Aguilar, Steven Ahlen, Abhijeet Anand, Davide Bianchi, David Brooks, Todd Claybaugh, Axel de la Macorra, Peter Doel, Simone Ferraro, Nicole M. Firestone, Andreu Font-Ribera, Jaime E. Forero-Romero, Enrique Gaztañaga, Lucia Guaita, Gaston Gutierrez, Hiram K. Herrera-Alcantar, Klaus Honscheid, Ho Seong Hwang, Mustapha Ishak, Dick Joyce, David Kirkby, Theodore Kisner, Anthony Kremin, Ofer Lahav, Claire Lamman, Martin Landriau, Laurent Le Guillou, Marc Manera, Ramon Miquel, John Moustakas, Andrea Muñoz-Gutiérrez, Seshadri Nadathur, Nathalie Palanque-Delabrouille, Will Percival, Claire Poppett, Francisco Prada, Ignasi Pérez-Ràfols, Graziano Rossi, Eusebio Sanchez, David Schlegel, Michael Schubnell, Hee-Jong Seo, Joseph Harry Silber, Hyunmi Song, David Sprayberry, Gregory Tarlé, Benjamin Alan Weaver, Hu Zou
Institutions: Center for Astrophysics Harvard & Smithsonian, NSF NOIRLab, Lawrence Berkeley National Laboratory, Harvard University, Purdue University West Lafayette, Rutgers, The State University of New Jersey, Boston University, University of Milan, Brera Astronomical Observatory, National Institute for Astrophysics, University College London, Universidad Nacional Autónoma de México, University of California System, Institute for High Energy Physics, Universidad de Los Andes, Institut d'Estudis Espacials de Catalunya, Universidad Andrés Bello, Fermi National Accelerator Laboratory, Université Paris-Saclay, Institut d'Astrophysique de Paris, The Ohio State University, Seoul National University, The University of Texas at Dallas, Sorbonne Université, Universitat Autònoma de Barcelona, Institució Catalana de Recerca i Estudis Avançats, University of Waterloo, Perimeter Institute, Consejo Superior de Investigaciones Científicas, Instituto de Astrofísica de Andalucía, Universitat Politècnica de Catalunya, Sejong University, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, University of Michigan, Ohio University, Chinese Academy of Sciences
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
Funders: National Science Foundation, U.S. Department of Energy, Gordon and Betty Moore Foundation, Ministerio de Ciencia, Innovación y Universidades, National Energy Research Scientific Computing Center, National Research Foundation, National Research Foundation of Korea, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Ministry of Science and ICT, South Korea, Agencia Nacional de Investigación y Desarrollo, Office of Science, Science and Technology Facilities Council, Agencia Estatal de Investigación, Division of Astronomical Sciences
Awards: G1044631029, G1058702018, G1105844351, G1175115578, G122673668, G1286236842, G1337118460, G1369969436, G1677143136, G1813527838, G1863003419, G2262748287, G2366492356, G294895050, G300979063, G3083819904, G3452655474, G3460104338, G3480869486, AI Institute: AI Research Institute for Fundamental Interactions, G3812690899, Collaborative Research: Tracing the Evolution of the Largest Cosmic Structures and their Galaxy Constituents in the Distant Universe, G416830363, G419881185, G425668148, G42916606, G4308274077, G4501827968, Graduate Research Fellowship Program (GRFP), G469631764, G491712853, G498139845, MILLENIUM NUCLEUS FOR GALAXIES, G5076365615, G5080475149, G5635532810, G5722379016, G5834573078, G593054264, G6576738931, G6652958823, G6876926712, G7084143925, G7085078440, Management and Operations of the National Optical Astronomy Observatory, G7395345766, G7542854517, G7805626310, G7863371703, GALAXY EVOLUTION WITH RESPECT TO THE LARGE SCALE STRUCTURE, G8345352404, G8497050386, G8667377315, CENTRO DE ASTROFISICA Y TECNOLOGIAS AFINES (CATA), G969889393
OpenAlex ID: W7221110532