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Detection of an oxygen emission line from a high-redshift galaxy in the reionization epoch
Osaka Sangyo Univ, Coll Gen Educ, 3-1-1 Nakagaito, Daito, Osaka 5748530, Japan..
Univ Tokyo, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan..
Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.;Grad Univ Adv Studies SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan..
Osaka Sangyo Univ, Coll Gen Educ, 3-1-1 Nakagaito, Daito, Osaka 5748530, Japan..
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2016 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 352, no 6293, 1559-1562 p.Article in journal (Refereed) PublishedText
Abstract [en]

The physical properties and elemental abundances of the interstellar medium in galaxies during cosmic reionization are important for understanding the role of galaxies in this process. We report the Atacama Large Millimeter/submillimeter Array detection of an oxygen emission line at a wavelength of 88 micrometers from a galaxy at an epoch about 700 million years after the Big Bang. The oxygen abundance of this galaxy is estimated at about one-tenth that of the Sun. The nondetection of far-infrared continuum emission indicates a deficiency of interstellar dust in the galaxy. A carbon emission line at a wavelength of 158 micrometers is also not detected, implying an unusually small amount of neutral gas. These properties might allow ionizing photons to escape into the intergalactic medium.

Place, publisher, year, edition, pages
2016. Vol. 352, no 6293, 1559-1562 p.
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-299562DOI: 10.1126/science.aaf0714ISI: 000378346500039PubMedID: 27312046OAI: oai:DiVA.org:uu-299562DiVA: diva2:949802
Funder
Swedish Research Council, 2011-5349Wenner-Gren Foundations
Available from: 2016-07-25 Created: 2016-07-22 Last updated: 2016-07-25Bibliographically approved

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Zackrisson, Erik
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