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Dust destruction and intermittent star formation history inblue compact dwarf galaxies

Published online by Cambridge University Press:  25 September 2002

M. Giard ,
J.P. Bernard ,
A. Klotz ,
I. Ristorcelli ,
H. Hirashita ,
Y. Y. Tajiri  and
H. Kamaya
H. Hirashita
Affiliation:
Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
Y. Y. Tajiri
Affiliation:
Department of Astronomy, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
H. Kamaya
Affiliation:
Department of Astronomy, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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Abstract

We investigate the origin of the variance in dust-to-gas ratio, D, among blue compact dwarf galaxies (BCDs), finding that the observed variance can be reproduced by two effects: (i) variation of gas mass contained in star-forming region; (ii) the contribution of type Ia SNe to total SN rate. The two effects are found to affect largely D when the metallicity reaches the typical value for BCDs. The two effects can be caused by intermittent star formation activity in BCDs.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 4: Infrared and Submillimeter Space Astronomy: An International Colloquium to Honor the Memory of Guy Serra , 2002 , pp. 363
Copyright
© EAS, EDP Sciences, 2002

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