| |  Online-Ressource |
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| Verfasst von: | Jeffreson, Sarah [VerfasserIn]  |
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| | Keller, Benjamin W. [VerfasserIn] |
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| | Winter, Andrew J. [VerfasserIn] |
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| | Chevance, Mélanie [VerfasserIn] |
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| | Kruijssen, Diederik [VerfasserIn] |
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| | Krumholz, Mark R. [VerfasserIn] |
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| | Fujimoto, Yusuke [VerfasserIn] |
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| Titel: | A scaling relation for the molecular cloud lifetime in Milky Way-like galaxies |
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| Verf.angabe: | Sarah M.R. Jeffreson, Benjamin W. Keller, Andrew J. Winter, Mélanie Chevance, J.M. Diederik Kruijssen, Mark R. Krumholz and Yusuke Fujimoto |
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| E-Jahr: | 2021 |
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| Jahr: | 7 May 2021 |
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| Umfang: | 21 S. |
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| Fussnoten: | Gesehen am 08.09.2021 |
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| Titel Quelle: | Enthalten in: Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society |
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| Ort Quelle: | Oxford : Oxford Univ. Press, 1827 |
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| Jahr Quelle: | 2021 |
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| Band/Heft Quelle: | 505(2021), 2, Seite 1678-1698 |
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| ISSN Quelle: | 1365-2966 |
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| Abstract: | We study the time evolution of molecular clouds across three Milky Way-like isolated disc galaxy simulations at a temporal resolution of 1 Myr and at a range of spatial resolutions spanning two orders of magnitude in spatial scale from similar to 10 pc up to similar to 1 kpc. The cloud evolution networks generated at the highest spatial resolution contain a cumulative total of similar to 80000 separate molecular clouds in different galactic-dynamical environments. We find that clouds undergo mergers at a rate proportional to the crossing time between their centroids, but that their physical properties are largely insensitive to these interactions. Below the gas-disc scale height, the cloud lifetime tau(life) obeys a scaling relation of the form tau(life)proportional to l(-0.3) with the cloud size l, consistent with over-densities that collapse, form stars, and are dispersed by stellar feedback. Above the disc scale height, these self-gravitating regions are no longer resolved, so the scaling relation flattens to a constant value of similar to 13 Myr, consistent with the turbulent crossing time of the gas disc, as observed in nearby disc galaxies. |
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| DOI: | doi:10.1093/mnras/stab1293 |
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| 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 ; Verlag: https://doi.org/10.1093/mnras/stab1293 |
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| | Volltext: https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=DynamicDOIArticle&SrcApp=WOS&KeyAID=10.1093%2 ... |
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| | DOI: https://doi.org/10.1093/mnras/stab1293 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | density-fluctuations |
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| | evolutionary sequences |
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| | formation cycle |
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| | formation efficiency |
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| | galactic distribution |
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| | galaxies: evolution |
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| | galaxies: ISM |
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| | hierarchical star-formation |
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| | interstellar-medium |
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| | ISM: clouds |
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| | ISM: evolution |
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| | ISM: kinematics and dynamics |
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| | nearby galaxies |
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| | radiative opacities |
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| | stars: formation |
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| | uncertainty principle |
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| K10plus-PPN: | 1769680411 |
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| Verknüpfungen: | → Zeitschrift |
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¬A¬ scaling relation for the molecular cloud lifetime in Milky Way-like galaxies / Jeffreson, Sarah [VerfasserIn]; 7 May 2021 (Online-Ressource)
