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dc.date.accessioned2018-08-23T12:09:33Z
dc.date.available2018-08-23T12:09:33Z
dc.date.created2018-07-23T12:34:43Z
dc.date.issued2018
dc.identifier.citationMason, Charlotte A. Treu, Tommaso De Barros, Stephane Dijkstra, Mark Fontana, Adriano Mesinger, Andrei Pentericci, Laura Trenti, Michele Vanzella, Eros . Beacons into the Cosmic Dark Ages: Boosted Transmission of Lyα from UV Bright Galaxies at z ≳ 7. Astrophysical Journal Letters. 2018, 857(2)
dc.identifier.urihttp://hdl.handle.net/10852/63644
dc.description.abstractRecent detections of Lyman alpha (Lyα) emission from z > 7.5 galaxies were somewhat unexpected given a dearth of previous non-detections in this era when the intergalactic medium (IGM) is still highly neutral. But these detections were from UV bright galaxies, which preferentially live in overdensities that reionize early, and have significantly Doppler-shifted Lyα line profiles emerging from their interstellar media (ISM), making them less affected by the global IGM state. Using a combination of reionization simulations and empirical ISM models we show, as a result of these two effects, that UV bright galaxies in overdensities have >2× higher transmission through the z ~ 7 IGM than typical field galaxies, and that this boosted transmission is enhanced as the neutral fraction increases. The boosted transmission is not sufficient to explain the observed high Lyα fraction of M uv lesssim −22 galaxies, suggesting that Lyα emitted by these galaxies must be stronger than expected due to enhanced production and/or selection effects. Despite the bias of UV bright galaxies to reside in overdensities we show Lyα observations of such galaxies can accurately measure the global neutral hydrogen fraction, particularly when Lyα from UV faint galaxies is extinguished, making them ideal candidates for spectroscopic follow-up into the cosmic Dark Ages.en_US
dc.languageEN
dc.publisherInstitute of Physics Publishing Ltd.
dc.titleBeacons into the Cosmic Dark Ages: Boosted Transmission of Lyα from UV Bright Galaxies at z ≳ 7en_US
dc.title.alternativeENEngelskEnglishBeacons into the Cosmic Dark Ages: Boosted Transmission of Lyα from UV Bright Galaxies at z ≳ 7
dc.typeJournal articleen_US
dc.creator.authorMason, Charlotte A.
dc.creator.authorTreu, Tommaso
dc.creator.authorDe Barros, Stephane
dc.creator.authorDijkstra, Mark
dc.creator.authorFontana, Adriano
dc.creator.authorMesinger, Andrei
dc.creator.authorPentericci, Laura
dc.creator.authorTrenti, Michele
dc.creator.authorVanzella, Eros
cristin.unitcode185,15,3,0
cristin.unitnameInstitutt for teoretisk astrofysikk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2
dc.identifier.cristin1598334
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astrophysical Journal Letters&rft.volume=857&rft.spage=&rft.date=2018
dc.identifier.jtitleAstrophysical Journal Letters
dc.identifier.volume857
dc.identifier.issue2
dc.identifier.pagecount6
dc.identifier.doihttp://dx.doi.org/10.3847/2041-8213/aabbab
dc.identifier.urnURN:NBN:no-66191
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn2041-8205
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/63644/2/Mason_2018_ApJL_857_L11.pdf
dc.type.versionPublishedVersion
cristin.articleidL11


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