ODIN: Improved Narrowband Lyα Emitter Selection Techniques for z = 2.4, 3.1, and 4.5

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dc.contributor.authorFirestone, Nicole M.
dc.contributor.authorGawiser, Eric
dc.contributor.authorRamakrishnan, Vandana
dc.contributor.authorLee, Kyoung-Soo
dc.contributor.authorValdes, Francisco
dc.contributor.authorPark, Changbom
dc.contributor.authorYang, Yujin
dc.contributor.authorCiardullo, Robin
dc.contributor.authorArtale, María Celeste
dc.contributor.authorBenda, Barbara
dc.contributor.authorBroussard, Adam
dc.contributor.authorEid, Lana
dc.contributor.authorFarooq, Rameen
dc.contributor.authorGronwall, Caryl
dc.contributor.authorGuaita, Lucia
dc.contributor.authorGwyn, Stephen
dc.contributor.authorHwang, Ho Seong
dc.contributor.authorIm, Sang Hyeok
dc.contributor.authorJeong, Woong-Seob
dc.contributor.authorKarthikeyan, Shreya
dc.contributor.authorLang, Dustin
dc.contributor.authorMoon, Byeongha
dc.contributor.authorPadilla, Nelson
dc.contributor.authorSawicki, Marcin
dc.contributor.authorSeo, Eunsuk
dc.contributor.authorSingh, Akriti
dc.contributor.authorSong, Hyunmi
dc.contributor.authorTroncoso Iribarren, Paulina
dc.date.accessioned2024-11-11T14:36:10Z
dc.date.available2024-11-11T14:36:10Z
dc.date.issued2024-10
dc.descriptionIndexación: Scopus.
dc.description.abstractLyman-alpha-emitting galaxies (LAEs) are typically young, low-mass, star-forming galaxies with little extinction from interstellar dust. Their low dust attenuation allows their Lyα emission to shine brightly in spectroscopic and photometric observations, providing an observational window into the high-redshift Universe. Narrowband surveys reveal large, uniform samples of LAEs at specific redshifts that probe large-scale structure and the temporal evolution of galaxy properties. The One-hundred-deg2 DECam Imaging in Narrowbands (ODIN) utilizes three custom-made narrowband filters on the Dark Energy Camera (DECam) to discover LAEs at three equally spaced periods in cosmological history. In this paper, we introduce the hybrid-weighted double-broadband continuum estimation technique, which yields improved estimation of Lyα equivalent widths. Using this method, we discover 6032, 5691, and 4066 LAE candidates at z = 2.4, 3.1, and 4.5 in the extended COSMOS field (∼9 deg2). We find that [O ii] emitters are a minimal contaminant in our LAE samples, but that interloping Green Pea-like [O iii] emitters are important for our redshift 4.5 sample. We introduce an innovative method for identifying [O ii] and [O iii] emitters via a combination of narrowband excess and galaxy colors, enabling their study as separate classes of objects. We present scaled median stacked spectral energy distributions for each galaxy sample, revealing the overall success of our selection methods. We also calculate rest-frame Lyα equivalent widths for our LAE samples and find that the EW distributions are best fit by exponential functions with scale lengths of w 0 = 53 ± 1, 65 ± 1, and 59 ± 1 Å, respectively.
dc.description.urihttps://www-scopus-com.recursosbiblioteca.unab.cl/record/display.uri?eid=2-s2.0-85207365497&origin=resultslist&sort=plf-f&src=s&sid=8b02287eab123202f16449db740c8e77&sot=b&sdt=b&s=TITLE-ABS-KEY%28ODIN%3A+Improved+Narrowband+Ly%CE%B1+Emitter+Selection+Techniques+for+z+%3D+2.4%2C+3.1%2C+and+4.5%29&sl=99&sessionSearchId=8b02287eab123202f16449db740c8e77&relpos=0
dc.identifier.citationAstrophysical Journal Open Access Volume 974, Issue 21 October 2024 Article number 217
dc.identifier.doi10.3847/1538-4357/ad71c9
dc.identifier.issn0004-637X
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/61853
dc.language.isoen
dc.publisherInstitute of Physics
dc.rights.licenseCC BY 4.0 Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleODIN: Improved Narrowband Lyα Emitter Selection Techniques for z = 2.4, 3.1, and 4.5
dc.typeArtículo
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