Universität zu Köln

Rathjen, Tim-Eric, Naab, Thorsten, Girichidis, Philipp, Walch, Stefanie, Wuensch, Richard, Dinnbier, Frantissek, Seifried, Daniel, Klessen, Ralf S. and Glover, Simon C. O. (2021). SILCC VI - Multiphase ISM structure, stellar clustering, and outflows with supernovae, stellar winds, ionizing radiation, and cosmic rays. Mon. Not. Roy. Astron. Soc., 504 (1). S. 1039 - 1062. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We present simulations of the multiphase interstellar medium (ISM) at solar neighbourhood conditions including thermal and non-thermal ISM processes, star cluster formation, and feedback from massive stars: stellar winds, hydrogen ionizing radiation computed with the novel treeray radiative transfer method, supernovae (SN), and the injection of cosmic rays (CR). N-body dynamics is computed with a 4th-order Hermite integrator. We systematically investigate the impact of stellar feedback on the self-gravitating ISM with magnetic fields, CR advection and diffusion, and non-equilibrium chemical evolution. SN-only feedback results in strongly clustered star formation with very high star cluster masses, a bi-modal distribution of the ambient SN densities, and low volume-filling factors (VFF) of warm gas, typically inconsistent with local conditions. Early radiative feedback prevents an initial starburst, reduces star cluster masses and outflow rates. Furthermore, star formation rate surface densities of Sigma((M)over dot star) = 1.4 - 5.9 x 10(-3) M-circle dot yr(-1) kpc(-2), VFFwarm = 60-80 per cent as well as thermal, kinetic, magnetic, and cosmic ray energy densities of the model including all feedback mechanisms agree well with observational constraints. On the short, 100 Myr, time-scales investigated here, CRs only have a moderate impact on star formation and the multiphase gas structure and result in cooler outflows, if present. Our models indicate that at low gas surface densities SN-only feedback only captures some characteristics of the star-forming ISM and outflows/inflows relevant for regulating star formation. Instead, star formation is regulated on star cluster scales by radiation and winds from massive stars in clusters, whose peak masses agree with solar neighbourhood estimates.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Rathjen, Tim-Eric UNSPECIFIED UNSPECIFIED UNSPECIFIED Naab, Thorsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Girichidis, Philipp UNSPECIFIED UNSPECIFIED UNSPECIFIED Walch, Stefanie UNSPECIFIED UNSPECIFIED UNSPECIFIED Wuensch, Richard UNSPECIFIED UNSPECIFIED UNSPECIFIED Dinnbier, Frantissek UNSPECIFIED UNSPECIFIED UNSPECIFIED Seifried, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED Klessen, Ralf S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Glover, Simon C. O. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-595228
DOI:	10.1093/mnras/stab900
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	504
Number:	1
Page Range:	S. 1039 - 1062
Date:	2021
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1365-2966
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MASSIVE STAR-CLUSTERS; INTERSTELLAR-MEDIUM; MOLECULAR CLOUDS; MAGNETIC-FIELDS; PARTICLE-ACCELERATION; NUMERICAL SIMULATIONS; DYNAMICAL EVOLUTION; CHEMICAL EVOLUTION; NEARBY GALAXIES; DRIVEN ISM Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/59522