Universität zu Köln

Steinwandel, Ulrich P., Moster, Benjamin P., Naab, Thorsten, Hu, Chia-Yu ORCID: 0000-0002-9235-3529 and Walch, Stefanie (2020). Hot phase generation by supernovae in ISM simulations: resolution, chemistry, and thermal conduction. Mon. Not. Roy. Astron. Soc., 495 (1). S. 1035 - 1061. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

Supernovae (SNe) generate hot gas in the interstellar medium (ISM), help setting the ISM structure, and support the driving of outflows. It is important to resolve the hot gas generation for galaxy formation simulations at solar mass and sub-parsec resolution that realize individual SN explosions with ambient densities varying by several orders of magnitude in a realistic multiphase ISM. We test resolution requirements by simulating SN blast waves at three metallicities (Z = 0.01, 0.1, and 1 Z(circle dot)), six densities and their respective equilibrium chemical compositions (n = 0.001-100 cm(-3)), and four mass resolutions (0.1-100 M-circle dot), in three dimensions. We include non-equilibrium cooling and chemistry, a homogeneous interstellar radiation field, and shielding with a modern pressure-energy smoothed particle hydrodynamics method including isotropic thermal conduction and a meshless-finite-mass solver. We find stronger resolution requirements for chemistry and hot phase generation than for momentum generation. While at 10 M-circle dot the radial momenta at the end of the Sedov phase start converging, the hot phase generation and chemistry require higher resolutions to represent the neutralto-ionized hydrogen fraction at the end of the Sedov phase correctly. Thermal conduction typically reduces the hot phase by 0.2 dex and has little impact on the chemical composition. In general, our 1 and 0.1 M-circle dot results agree well with previous numerical and analytic estimates. We conclude that for the thermal energy injection SN model presented here resolutions higher than 10 M-circle dot are required to model the chemistry, momentum, and hot phase generation in the multiphase ISM.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Steinwandel, Ulrich P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Moster, Benjamin P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Naab, Thorsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Hu, Chia-Yu UNSPECIFIED orcid.org/0000-0002-9235-3529 UNSPECIFIED Walch, Stefanie UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-331926
DOI:	10.1093/mnras/staa821
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	495
Number:	1
Page Range:	S. 1035 - 1061
Date:	2020
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1365-2966
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language THIN SHELL FORMATION; STAR-FORMATION; INTERSTELLAR-MEDIUM; MOLECULAR CLOUDS; DWARF GALAXIES; SILCC PROJECT; DRIVEN ISM; EVOLUTION; FEEDBACK; GAS Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/33192