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Gas-rich LSB Galaxies – Progenitors of Blue Compact Dwarfs?

Published online by Cambridge University Press:  12 April 2016

John J. Salzer  and
Stuart A. Norton
John J. Salzer
Affiliation:
Astronomy Department, Wesleyan University, Middletown, CT 06459
Stuart A. Norton
Affiliation:
Lick Observatory, Univ. California Santa Cruz, Santa Cruz, CA 95064

Abstract

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We analyze deep CCD images of nearby Blue Compact Dwarf (BCD) galaxies in an attempt to understand the nature of the progenitors which are hosting the current burst of star formation. In particular, we ask whether BCDs are hosted by normal or low-surface-brightness dI galaxies. We conclude that BCDs are in fact hosted by gas-rich galaxies which populate the extreme high-central-mass-density end of the dwarf galaxy distribution. Such galaxies are predisposed to having numerous strong bursts of star formation in their central regions. In this picture, BCDs can only occur in the minority of dwarf galaxies, rather than being a common phase experienced by all gas-rich dwarfs.

Type
The evolution of Low Surface Brightness galaxies
Information
International Astronomical Union Colloquium , Volume 171: The Low Surface Brightness Universe , 1999 , pp. 253 - 260
Copyright
Copyright © Astronomical Society of the Pacific 1999

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