Universität zu Köln

Peters, Thomas, Zhukovska, Svitlana ORCID: 0000-0003-2569-3627, Naab, Thorsten ORCID: 0000-0002-7314-2558, Girichidis, Philipp ORCID: 0000-0002-9300-9914, Walch, Stefanie, Glover, Simon C. O., Klessen, Ralf S., Clark, Paul C. and Seifried, Daniel ORCID: 0000-0002-0368-9160 (2017). The turbulent life of dust grains in the supernova-driven, multiphase interstellar medium. Mon. Not. Roy. Astron. Soc., 467 (4). S. 4322 - 4343. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

Dust grains are an important component of the interstellar medium (ISM) of galaxies. We present the first direct measurement of the residence times of interstellar dust in the different ISM phases, and of the transition rates between these phases, in realistic hydrodynamical simulations of the multiphase ISM. Our simulations include a time-dependent chemical network that follows the abundances of H+, H, H-2, C+ and CO and take into account self-shielding by gas and dust using a tree-based radiation transfer method. Supernova explosions are injected either at random locations, at density peaks, or as a mixture of the two. For each simulation, we investigate how matter circulates between the ISM phases and find more sizeable transitions than considered in simple mass exchange schemes in the literature. The derived residence times in the ISM phases are characterized by broad distributions, in particular for the molecular, warm and hot medium. The most realistic simulations with random and mixed driving have median residence times in the molecular, cold, warm and hot phase around 17, 7, 44 and 1 Myr, respectively. The transition rates measured in the random driving run are in good agreement with observations of Ti gas-phase depletion in the warm and cold phases in a simple depletion model. ISM phase definitions based on chemical abundance rather than temperature cuts are physically more meaningful, but lead to significantly different transition rates and residence times because there is no direct correspondence between the two definitions.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Peters, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhukovska, Svitlana UNSPECIFIED orcid.org/0000-0003-2569-3627 UNSPECIFIED Naab, Thorsten UNSPECIFIED orcid.org/0000-0002-7314-2558 UNSPECIFIED Girichidis, Philipp UNSPECIFIED orcid.org/0000-0002-9300-9914 UNSPECIFIED Walch, Stefanie UNSPECIFIED UNSPECIFIED UNSPECIFIED Glover, Simon C. O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Klessen, Ralf S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Clark, Paul C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Seifried, Daniel UNSPECIFIED orcid.org/0000-0002-0368-9160 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-230574
DOI:	10.1093/mnras/stx341
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	467
Number:	4
Page Range:	S. 4322 - 4343
Date:	2017
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1365-2966
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GIANT MOLECULAR CLOUDS; THERMAL BALANCE; STAR-FORMATION; SILCC PROJECT; DARK CLOUDS; EVOLUTION; GAS; EXTINCTION; DEPLETION; II. Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23057