The assembly bias of emission-line galaxies

Simple item page
dc.contributor.authorJimenez, Esteban
dc.contributor.authorPadilla, Nelson
dc.contributor.authorContreras, Sergio
dc.contributor.authorZehavi, Idit
dc.contributor.authorBaugh, Carlton M.
dc.contributor.authorOrsi, Alvaro
dc.date.accessioned2025-01-20T22:02:26Z
dc.date.available2025-01-20T22:02:26Z
dc.date.issued2021
dc.description.abstractThe next generation of spectroscopic surveys will target emission-line galaxies (ELGs) to produce constraints on cosmological parameters. We study the large-scale structure traced by ELGs using a combination of a semi-analytical model of galaxy formation, a code that computes the nebular emission from H II regions using the properties of the interstellar medium, and a large-volume, high-resolution N-body simulation. We consider fixed number density samples where galaxies are selected by their H alpha, [O III] lambda 5007, or [O II] lambda lambda 3727-3729 emission-line luminosities. We investigate the assembly bias signatures of these samples, and compare them to those of stellar mass- and star formation rate-selected samples. Interestingly, we find that the [O III]- and [O II]-selected samples display scale-dependent bias on large scales and that their assembly bias signatures are also scale dependent. Both these effects are more pronounced for lower number density samples. The [O III] and [O II] emitters that contribute most to the scale dependence tend to have a low gas-phase metallicity and are preferentially found in low-density regions. We also measure the baryon acoustic oscillation (BAO) feature and the beta parameter related to the growth rate of overdensities. We find that the scale of the BAO peak is roughly the same for all selections and that beta is scale dependent at large scales. Our results suggest that ELG samples include environmental effects that should be modelled in order to remove potential systematic errors that could affect the estimation of cosmological parameters.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stab1819
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stab1819
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93982
dc.identifier.wosidWOS:000685245200004
dc.issue.numero3
dc.language.isoen
dc.pagina.final3168
dc.pagina.inicio3155
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectgalaxies: evolution
dc.subjectgalaxies: formation
dc.subjectgalaxies: statistic
dc.subjectlarge-scale structure of Universe
dc.titleThe assembly bias of emission-line galaxies
dc.typeartículo
dc.volumen506
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas