ODIN: Probing the LAE lya luminosity function across cosmic time and different environments

The ubiquity and relative ease of discovery make 2 ¿ z ¿ 5 Lya emitting galaxies (LAEs) ideal tracers for large-scale structure of the distant Universe. In addition, because Lya is a resonance line, but frequently observed at large equivalent width, it is potentially a probe of galaxy evolution. The...

Descripción completa

Detalles Bibliográficos
Autores: Nagaraj, Gautam|||0000-0002-0905-342X, Ciardullo, Robin|||0000-0002-1328-0211, Gronwall, Caryl Ann|||0000-0001-6842-2371, Ramakrishnan, Vandana|||0000-0002-9176-7252, Lee, Kyoung Soo|||0000-0003-3004-9596, Gawiser, Eric|||0000-0003-1530-8713, Firestone, Nicole|||0000-0002-9811-2443, Pérez Ràfols, Ignasi|||0000-0001-6979-0125
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/457466
Acceso en línea:https://hdl.handle.net/2117/457466
https://dx.doi.org/10.3847/1538-4357/ae1969
Access Level:acceso abierto
Palabra clave:Luminosity function
Lyman-alpha galaxies
Galaxy environments
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
Descripción
Sumario:The ubiquity and relative ease of discovery make 2 ¿ z ¿ 5 Lya emitting galaxies (LAEs) ideal tracers for large-scale structure of the distant Universe. In addition, because Lya is a resonance line, but frequently observed at large equivalent width, it is potentially a probe of galaxy evolution. The LAE Lya luminosity function (LF) is an essential measurement for making progress on both of these topics. Although several studies have computed the LAE LF, very few have delved into how the function varies with environment. The large area and depth of the One-hundred-deg2 DECam Imaging in Narrowbands (ODIN) survey makes such measurements possible at the cosmic noon redshifts of z ~ 2.4, 3.1, and 4.5. In this initial work, we present algorithms needed to rigorously compute the LAE LF, and test them on the ~16,000 ODIN LAEs found in the extended COSMOS field. Using these limited samples, we find weak evidence that protocluster environments suppress the numbers of faint LAEs compared to the field. We also find that the LF decreases in number density and evolves towards a steeper faint-end slope over cosmic time from z ~ 4.5 to z ~ 2.4.

Similares en LA Referencia