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DC Field | Value | Language |
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dc.citation.endPage | 4607 | - |
dc.citation.number | 3 | - |
dc.citation.startPage | 4582 | - |
dc.citation.title | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | - |
dc.citation.volume | 510 | - |
dc.contributor.author | Naidu, Rohan P. | - |
dc.contributor.author | Matthee, Jorryt | - |
dc.contributor.author | Oesch, Pascal A. | - |
dc.contributor.author | Conroy, Charlie | - |
dc.contributor.author | Sobral, David | - |
dc.contributor.author | Pezzulli, Gabriele | - |
dc.contributor.author | Hayes, Matthew | - |
dc.contributor.author | Erb, Dawn | - |
dc.contributor.author | Amorin, Ricardo | - |
dc.contributor.author | Gronke, Max | - |
dc.contributor.author | Schaerer, Daniel | - |
dc.contributor.author | Tacchella, Sandro | - |
dc.contributor.author | Kerutt, Josephine | - |
dc.contributor.author | Paulino-Afonso, Ana | - |
dc.contributor.author | Calhau, Joao | - |
dc.contributor.author | Llerena, Mario | - |
dc.contributor.author | Rottgering, Huub | - |
dc.date.accessioned | 2023-12-21T14:23:22Z | - |
dc.date.available | 2023-12-21T14:23:22Z | - |
dc.date.created | 2022-04-15 | - |
dc.date.issued | 2022-03 | - |
dc.description.abstract | The ionizing photon escape fraction [Lyman continuum (LyC) f(esc)] of star-forming galaxies is the single greatest unknown in the reionization budget. Stochastic sightline effects prohibit the direct separation of LyC leakers from non-leakers at significant redshifts. Here we circumvent this uncertainty by inferring f(esc) using resolved (R > 4000) Lyman alpha (Ly alpha) profiles from the X-SHOOTER Ly alpha survey at z = 2 (XLS-z2). With empirically motivated criteria, we use Ly alpha profiles to select leakers (f(esc) > 20 per cent) and non-leakers (f(esc) < 5 per cent) from a representative sample of >0.2L* Lyman alpha emitters (LAEs). We use median stacked spectra of these subsets over lambda(rest) approximate to 1000-8000 angstrom to investigate the conditions for LyC f(esc). Our stacks show similar mass, metallicity, M-UV, and beta(UV). We find the following differences between leakers versus non-leakers: (i) strong nebular C IV and He II emission versus non-detections; (ii) [O III]/[O II] approximate to 8.5 versus approximate to 3; (iii) H alpha/H beta indicating no dust versus E(B - V) approximate to 0.3; (iv) Mg II emission close to the systemic velocity versus redshifted, optically thick Mg II; and (v) Ly alpha f(esc) of approximate to 50 per cent versus approximate to 10 per cent. The extreme equivalent widths (EWs) in leakers ([O III]+H beta approximate to 1100 Arest frame) constrain the characteristic time-scale of LyC escape to approximate to 3-10 Myr bursts when short-lived stars with the hardest ionizing spectra shine. The defining traits of leakers - extremely ionizing stellar populations, low column densities, a dust-free, high-ionization state interstellar medium (ISM) - occur simultaneously in the f(esc) > 20 per cent stack, suggesting they are causally connected, and motivating why indicators like [O III]/[O II] may suffice to constrain f(esc) at z > 6 with the James Webb Space Telescope (JWST). The leakers comprise half of our sample, have a median LyC f(esc) approximate to 50 per cent (conservative range: 20-55 per cent), and an ionizing production efficiency log(xi(ion)/Hz erg(-1)) approximate to 25.9 (conservative range: 25.7-25.9). These results show LAEs - the type of galaxies rare at z approximate to 2, but that become the norm at higher redshift - are highly efficient ionizers, with extreme xi(ion) and prolific f(esc) occurring in sync. | - |
dc.identifier.bibliographicCitation | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, v.510, no.3, pp.4582 - 4607 | - |
dc.identifier.doi | 10.1093/mnras/stab3601 | - |
dc.identifier.issn | 0035-8711 | - |
dc.identifier.scopusid | 2-s2.0-85125462682 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/59162 | - |
dc.identifier.url | https://academic.oup.com/mnras/article/510/3/4582/6459744 | - |
dc.identifier.wosid | 000773563600023 | - |
dc.language | 영어 | - |
dc.publisher | OXFORD UNIV PRESS | - |
dc.title | The synchrony of production and escape: half the bright Ly alpha emitters at z approximate to 2 have Lyman continuum escape fractions approximate to 50 per cent | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Astronomy & Astrophysics | - |
dc.relation.journalResearchArea | Astronomy & Astrophysics | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | galaxies: evolution | - |
dc.subject.keywordAuthor | galaxies: high-redshift | - |
dc.subject.keywordAuthor | intergalactic medium | - |
dc.subject.keywordAuthor | dark ages, reionization, first stars | - |
dc.subject.keywordAuthor | cosmology: observations | - |
dc.subject.keywordAuthor | ultraviolet: galaxies | - |
dc.subject.keywordPlus | STAR-FORMING GALAXIES | - |
dc.subject.keywordPlus | SPECTRAL ENERGY-DISTRIBUTION | - |
dc.subject.keywordPlus | EMISSION-LINE DIAGNOSTICS | - |
dc.subject.keywordPlus | HIGH-REDSHIFT GALAXIES | - |
dc.subject.keywordPlus | O III EMITTERS | - |
dc.subject.keywordPlus | IONIZING-RADIATION | - |
dc.subject.keywordPlus | LUMINOSITY FUNCTION | - |
dc.subject.keywordPlus | STELLAR MASS | - |
dc.subject.keywordPlus | COSMIC REIONIZATION | - |
dc.subject.keywordPlus | EMITTING GALAXIES | - |
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