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

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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.identifier.wosidWOS:000526035600064
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
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