A large, deep 3 deg2 survey of H α, [O iii], and [O ii] emitters from LAGER: constraining luminosity functions

Simple item page
dc.contributor.authorKhostovan, A. A.
dc.contributor.authorMalhotra, S.
dc.contributor.authorRhoads, J. E.
dc.contributor.authorJiang, C.
dc.contributor.authorWang, J.
dc.contributor.authorWold, I.
dc.contributor.authorZheng, Z. Y.
dc.contributor.authorBarrientos, Luis Felipe
dc.contributor.authorCoughlin, A.
dc.contributor.authorHarish, S.
dc.contributor.authorHu, W.
dc.contributor.authorInfante Lira, Leopoldo
dc.contributor.authorPerez, L. A.
dc.contributor.authorPharo, J.
dc.contributor.authorValdes, F.
dc.contributor.authorWalker, A. R.
dc.contributor.authorYan, H.
dc.date.accessioned2022-05-20T14:30:38Z
dc.date.available2022-05-20T14:30:38Z
dc.date.issued2020
dc.description.abstractWe present our measurements of the H α, [O iii], and [O ii] luminosity functions as part of the Lyman Alpha Galaxies at Epoch of Reionization (LAGER) survey using our samples of 1577 z = 0.47 H α-, 3933 z = 0.93 [O iii]-, and 5367 z = 1.59 [O ii]-selected emission line galaxies in a 3 deg 2 single, CTIO/Blanco DECam pointing of the COSMOS field. Our observations reach 5σ depths of 8.2 × 10 −18 erg s −1 cm −2 and comoving volumes of (1−7) × 10 5 Mpc 3 making our survey one of the deepest narrow-band surveys. We select our emission line galaxies via spectroscopic confirmation, photometric redshifts, and colour–colour selections. We measure the observed luminosity functions for each sample and find best fits of ϕ⋆=10−3.16+0.09−0.09 Mpc −3 and L⋆=1041.72+0.09−0.09 erg s −1 for H α, ϕ⋆=10−2.16+0.10−0.12 Mpc −3 and L⋆=1041.38+0.07−0.06 erg s −1 for [O iii], and ϕ⋆=10−1.97+0.07−0.07 Mpc −3 and L⋆=1041.66+0.03−0.03 erg s −1 for [O ii], with α fixed to −1.75, −1.6, and −1.3, respectively. An excess of bright >10 42 erg s −1 [O iii] emitters is observed and may be due to active galactic nucleus (AGN) contamination. Corrections for dust attenuation are applied assuming A Hα = 1 mag. We also design our own empirical rest-frame g − r calibration using SDSS DR12 data, test it against our z = 0.47 H α emitters with zCOSMOS 1D spectra, and calibrate it for (g − r) between −0.8 and 1.3 mag. Dust and AGN-corrected star formation rate densities (SFRDs) are measured as log 10 ρ SFR /(M ⊙  yr −1  Mpc −3 ) = −1.63 ± 0.04, −1.07 ± 0.06, and −0.90 ± 0.10 for H α, [O iii], and [O ii], respectively. We find our [O iii] and [O ii] samples fully trace cosmic star formation activity at their respective redshifts in comparison to multiwavelength SFRDs, while the H α sample traces ∼70 per cent of the total z = 0.47 SFRD.
dc.fuente.origenOUP
dc.identifier.doi10.1093/mnras/staa175
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=9111337
dc.identifier.urihttps://doi.org/10.1093/mnras/staa175
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/64249
dc.information.autorucInstituto de astrofísica ; Barrientos, Luis Felipe. ; S/I ; 102167
dc.issue.numero1
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final3984
dc.pagina.inicio3966
dc.publisherOUP
dc.revistaMonthly Notices of the Royal Astronomical Society
dc.rightsacceso restringido
dc.titleA large, deep 3 deg2 survey of H α, [O iii], and [O ii] emitters from LAGER: constraining luminosity functionses_ES
dc.typeartículo
dc.volumen493
sipa.codpersvinculados102167
Files
Collections
Artículos de revistas