Condensation and evaporation of interstellar clouds in chemodynamical models of galaxies

Autor(en)

Joachim Köppen, Christian Theis, Gerhard Hensler

Abstrakt

The network of interactions between hot gas, cool clouds, massive stars, and stellar remnants used in the chemodynamical modeling of the interstellar medium is investigated for the types of its solutions. In a physically consistent formulation for the energy transfer during condensation, oscillations due to a cyclic switching between condensation and evaporation never occur. A closed-box system evolves in a hierarchy of equilibria: thermal balance in the cloud gas, star-formation self-regulated due to heating of the clouds by massive stars, and the balance of condensation and evaporation. Except for an initial transitory phase, the evolution of the metallicity follows that of the Simple Model quite closely. For galaxies with a high initial density, or if the condensation rate is low. the metals produced by the stars may remain stored in the hot gas phase even in evolved systems with low gas fractions.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Université de Strasbourg

Journal

Astronomy & Astrophysics

Band

331

Seiten

524-534

Anzahl der Seiten

11

ISSN

0004-6361

Publikationsdatum

1998

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/condensation-and-evaporation-of-interstellar-clouds-in-chemodynamical-models-of-galaxies(60c87ae3-d10b-4347-ba29-7739e3a464b3).html