GREEN PEA GALAXIES REVEAL SECRETS OF Ly alpha ESCAPE

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dc.contributor.authorYang, Huan
dc.contributor.authorMalhotra, Sangeeta
dc.contributor.authorGronke, Max
dc.contributor.authorRhoads, James E.
dc.contributor.authorDijkstra, Mark
dc.contributor.authorJaskot, Anne
dc.contributor.authorZheng, Zhenya
dc.contributor.authorWang, Junxian
dc.date.accessioned2024-01-10T13:48:54Z
dc.date.available2024-01-10T13:48:54Z
dc.date.issued2016
dc.description.abstractWe analyze archival Ly alpha spectra of 12 "Green Pea" galaxies observed with the Hubble Space Telescope, model their Ly alpha profiles with radiative transfer models, and explore the dependence of the Ly alpha escape fraction on various properties. Green Pea galaxies are nearby compact starburst galaxies with [O III] lambda 5007 equivalent widths (EWs) of hundreds of angstrom. All 12 Green Pea galaxies in our sample show Ly alpha lines in emission, with an Ly alpha EW distribution similar to high-redshift Ly alpha emitters. Combining the optical and UV spectra of Green Pea galaxies, we estimate their Ly alpha escape fractions and find correlations between Ly alpha escape fraction and kinematic features of Ly alpha profiles. The escape fraction of Ly alpha in these galaxies ranges from 1.4% to 67%. We also find that the Ly alpha escape fraction depends strongly on metallicity and moderately on dust extinction. We compare their high-quality Ly alpha profiles with single H I shell radiative transfer models and find that the Ly alpha escape fraction anticorrelates with the derived H I column densities. Single-shell models fit most Ly alpha profiles well, but not the ones with the. highest escape fractions of Ly alpha. Our results suggest that low H I column density and low metallicity are essential for Ly alpha escape. and make a galaxy an Ly alpha emitter.
dc.description.funderChina Scholarship Council
dc.description.funderNSFC
dc.fechaingreso.objetodigital2024-05-30
dc.format.extent12 páginas
dc.fuente.origenWOS
dc.identifier.doi10.3847/0004-637X/820/2/130
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/0004-637X/820/2/130
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79406
dc.identifier.wosidWOS:000373741300049
dc.information.autorucAstrofísica;Zheng Z;S/I;243995
dc.issue.numero2
dc.language.isoen
dc.nota.accesoContenido parcial
dc.publisherIOP PUBLISHING LTD
dc.revistaASTROPHYSICAL JOURNAL
dc.rightsacceso restringido
dc.subjectgalaxies: high-redshift
dc.subjectgalaxies: starburst
dc.subjectline: profiles
dc.subjectradiative transfer
dc.subjectultraviolet: ISM
dc.subjectSTAR-FORMING GALAXIES
dc.subjectEMISSION-LINE GALAXIES
dc.subjectLYMAN BREAK GALAXIES
dc.subjectDIGITAL SKY SURVEY
dc.subjectSIMILAR-TO 3.1
dc.subjectEMITTING GALAXIES
dc.subjectLUMINOSITY FUNCTIONS
dc.subjectULTRAVIOLET-SPECTRA
dc.subjectPHYSICAL ORIGIN
dc.subjectFIELD GALAXIES
dc.titleGREEN PEA GALAXIES REVEAL SECRETS OF Ly alpha ESCAPE
dc.typeartículo
dc.volumen820
sipa.codpersvinculados243995
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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