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Verfasst von:Schauer, Anna T. P. [VerfasserIn]   i
 Glover, Simon [VerfasserIn]   i
 Klessen, Ralf S. [VerfasserIn]   i
 Clark, Paul [VerfasserIn]   i
Titel:The influence of streaming velocities and Lyman-Werner radiation on the formation of the first stars
Verf.angabe:Anna T.P. Schauer, Simon C.O. Glover, Ralf S. Klessen and Paul Clark
E-Jahr:2021
Jahr:22 July 2021
Umfang:13 S.
Fussnoten:Gesehen am 22.11.2021
Titel Quelle:Enthalten in: Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society
Ort Quelle:Oxford : Oxford Univ. Press, 1827
Jahr Quelle:2021
Band/Heft Quelle:507(2021), 2, Seite 1775-1787
ISSN Quelle:1365-2966
Abstract:The first stars in the Universe, the so-called Population III stars, form in small dark matter minihaloes with virial temperatures Tvir < 104 K. Cooling in these minihaloes is dominated by molecular hydrogen (H2), and so Population III star formation is only possible in those minihaloes that form enough H2 to cool on a short timescale. As H2 cooling is more effective in more massive minihaloes, there is therefore a critical halo mass scale Mmin above which Population III star formation first becomes possible. Two important processes can alter this minimum mass scale: streaming of baryons relative to the dark matter and the photodissociation of H2 by a high redshift Lyman-Werner (LW) background. In this paper, we present results from a set of high resolution cosmological simulations that examine the impact of these processes on Mmin and on Mave (the average minihalo mass for star formation), both individually and in combination. We show that streaming has a bigger impact on Mmin than the LW background, but also that both effects are additive. We also provide a fitting functions quantifying the dependence of Mave and Mmin on the streaming velocity and the strength of the LW background.
DOI:doi:10.1093/mnras/stab1953
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext: https://doi.org/10.1093/mnras/stab1953
 DOI: https://doi.org/10.1093/mnras/stab1953
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1778217605
Verknüpfungen:→ Zeitschrift

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