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Barred Galaxies: Intrinsic or Extrinsic?

Published online by Cambridge University Press:  12 April 2016

M. Noguchi
M. Noguchi*
Affiliation:
Astronomical Institute, Tohoku University, Aoba, Sendai 980-77, Japan

Abstract

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A unified picture is presented for the formation of bars in galaxies of different morphological types based on a simple model of the growth of galactic disks by gas infall from haloes. The infall timescale is found to be a key parameter which determines the dynamical property of the resulting disk. It is suggested that the bars in early-type disk galaxies have been formed in tidal interactions with other galaxies whereas those in late-type galaxies formed spontaneously due to gravitational instability (bar instability) in their disks.

Type
Part VI. Theory of Barred Galaxies II.
Information
International Astronomical Union Colloquium , Volume 157: Barred Galaxies , 1996 , pp. 339 - 348
Copyright
Copyright © Astronomical Society of the Pacific 1996

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