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Star Formation, Supernovae and the Structure of Disk Galaxies

Published online by Cambridge University Press:  12 April 2016

Michael A. Dopita  and
Mt. Stromlo
Michael A. Dopita
Affiliation:
Siding Spring Observatories The Australian, National University Private Bag, Woden P.O., ACT 2606, Australia
Mt. Stromlo
Affiliation:
Siding Spring Observatories The Australian, National University Private Bag, Woden P.O., ACT 2606, Australia

Abstract

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A physical model for bi-modal star formation and the structure of the interstellar medium and the self-regulating evolution of disk galaxies is presented. Stars heavier than about one solar mass are produced as a result of collisions of molecular clouds or in cloud crushing events whereas low-mass stars are produced at a steady rate in dense molecular clouds and the T-Tauri winds resulting maintain the support of these clouds against rapid collapse and fragmentation. Supernova explosions and stellar winds associated with the massive stars maintain the phase structure, and the scale height of the gas. The collective effects of these energetic processes may create a hole in the disk gas, and allow a galactic wind of metalenriched gas to develop.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 101: Supernova Remnants and the Interstellar Medium , 1988 , pp. 493 - 508
Copyright
Copyright © Cambridge University Press 1988

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