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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 thatthe observed variance can be reproduced by two effects: (i)variation of gas mass contained in star-forming region; (ii) thecontribution of type Ia SNeto total SN rate. The two effects are found to affectlargely D when the metallicity reaches the typical valuefor BCDs. The two effects can be caused byintermittent 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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