Universität zu Köln

Koertgen, Bastian, Seifried, Daniel ORCID: 0000-0002-0368-9160, Banerjee, Robi, Vazquez-Semadeni, Enrique ORCID: 0000-0002-1424-3543 and Zamora-Aviles, Manuel (2016). Supernova feedback in molecular clouds: global evolution and dynamics. Mon. Not. Roy. Astron. Soc., 459 (4). S. 3460 - 3475. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We use magnetohydrodynamical simulations of converging warm neutral medium flows to analyse the formation and global evolution of magnetized and turbulent molecular clouds subject to supernova feedback from massive stars. We show that supernova feedback alone fails to disrupt entire, gravitationally bound, molecular clouds, but is able to disperse small-sized (similar to 10 pc) regions on time-scales of less than 1 Myr. Efficient radiative cooling of the supernova remnant as well as strong compression of the surrounding gas result in non-persistent energy and momentum input from the supernovae. However, if the time between subsequent supernovae is short and they are clustered, large hot bubbles form that disperse larger regions of the parental cloud. On longer time-scales, supernova feedback increases the amount of gas with moderate temperatures (T a parts per thousand 300-3000 K). Despite its inability to disrupt molecular clouds, supernova feedback leaves a strong imprint on the star formation process. We find an overall reduction of the star formation efficiency by a factor of 2 and of the star formation rate by roughly factors of 2-4.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Koertgen, Bastian UNSPECIFIED UNSPECIFIED UNSPECIFIED Seifried, Daniel UNSPECIFIED orcid.org/0000-0002-0368-9160 UNSPECIFIED Banerjee, Robi UNSPECIFIED UNSPECIFIED UNSPECIFIED Vazquez-Semadeni, Enrique UNSPECIFIED orcid.org/0000-0002-1424-3543 UNSPECIFIED Zamora-Aviles, Manuel UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-269955
DOI:	10.1093/mnras/stw824
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	459
Number:	4
Page Range:	S. 3460 - 3475
Date:	2016
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1365-2966
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language APPROXIMATE RIEMANN SOLVER; STAR-FORMATION RATE; INTERSTELLAR-MEDIUM; SUPERSONIC TURBULENCE; AMBIPOLAR DIFFUSION; MASSIVE CLUSTERS; MAGNETIC-FIELDS; REGULATED ISM; DRIVEN ISM; SIMULATIONS Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26995