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Title:
Simulations of the supernova-dominated interstellar medium in disk galaxies
Authors:
Cioffi, Denis F.; Shull, J. Michael
Affiliation:
AA(NASA, Goddard Space Flight Center, Greenbelt, MD), AB(Joint Institute for Laboratory Astrophysics; Colorado, University, Boulder)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 367, Jan. 20, 1991, p. 96-114. (ApJ Homepage)
Publication Date:
01/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Computerized Simulation, Disk Galaxies, Interstellar Matter, Supernova Remnants, Energy Distribution, Mass Distribution, Mass Transfer, Milky Way Galaxy, Thermodynamic Properties
DOI:
10.1086/169606
Bibliographic Code:
1991ApJ...367...96C

Abstract

A three-dimensional simulation of the evolution of an SNR-dominated ISM from an initially homogeneous, uniform substrate is presented. Systems with only bremsstrahlung cooling are compared with those cooled by radiation from metals. This distinction translates into a size difference in the resulting SNRs, and thus in the ability of isolated SNRs to affect the evolution of the galactic ecosystem. At a given SN rate, correlating the SNe decreases the global evolution of the galaxy if the SNRs individually can affect the system. It is shown that, when the density of the ISM varies widely, the N(R) test can give the reverse of standard expectations. It is shown that strong SNRs can impede interstellar tunnel production because of their ability to transport material and fill a previously evacuated volume, and that cloud size affects the final picture of the system.

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