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  Detection of a high-redshift molecular outflow in a primeval hyperstarburst galaxy

Jones, G. C., Maiolino, R., Caselli, P., & Carniani, S. (2019). Detection of a high-redshift molecular outflow in a primeval hyperstarburst galaxy. Astronomy and Astrophysics, 632: L7. doi:10.1051/0004-6361/201936989.

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 Urheber:
Jones, G. C., Autor
Maiolino, R., Autor
Caselli, P.1, Autor           
Carniani, S., Autor
Affiliations:
1Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

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 Zusammenfassung: We report the discovery of a high-redshift, massive molecular outflow in the starburst galaxy SPT 0346-52 (z = 5.656) via the detected absorption of high-excitation water transitions (H2O 42,3 − 41,4 and H2O 33,0 − 32,1) with the Atacama Large Millimeter/submillimeter Array (ALMA). The host galaxy is one of the most powerful starburst galaxies at high redshift (star formation rate; SFR ∼3600 M year−1), with an extremely compact (∼320 pc) star formation region and a SFR surface density (ΣSFR ∼ 5500 M year−1 kpc−2) five times higher than “maximum” (i.e. Eddington-limited) starbursts, implying a highly transient phase. The estimated outflow rate is ∼500 M year−1, which is much lower than the SFR, implying that in this extreme starburst the outflow capabilities saturate and the outflow is no longer capable of regulating star formation, resulting in a runaway process in which star formation will use up all available gas in less than 30 Myr. Finally, while previous kinematic investigations of this source revealed possible evidence for an ongoing major merger, the coincidence of the hyper-compact starburst and high-excitation water absorption indicates that this is a single starburst galaxy surrounded by a disc.

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 Datum: 2019-12-03
 Publikationsstatus: Online veröffentlicht
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 Identifikatoren: DOI: 10.1051/0004-6361/201936989
Anderer: LOCALID: 3212894
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Titel: Astronomy and Astrophysics
  Andere : Astron. Astrophys.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: France : EDP Sciences S A
Seiten: - Band / Heft: 632 Artikelnummer: L7 Start- / Endseite: - Identifikator: ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1