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Star Formation in Infrared Bright and Infrared Faint Starburst Interacting Galaxies

Published online by Cambridge University Press:  12 April 2016

Susan A. Lamb ,
Howard A. Bushouse  and
John W. Towns
Susan A. Lamb
Affiliation:
Department of Physics, University of Illinois, Urbana, Illinois 61801 Department of Astronomy, University of Illinois, Urbana, Illinois 61801
Howard A. Bushouse
Affiliation:
Department of Physics, Northwestern University, Evanston, Illinois 60201
John W. Towns
Affiliation:
Department of Physics, University of Illinois, Urbana, Illinois 61801

Abstract

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Short wavelength IUE spectra of Arp 248b and UGC 8315N are combined with optical spectra and interpreted using a combination of spectrum synthesis and spectral diagnostics to place constraints on the massive star populations of the central regions of these galaxies and to deduce information about the star formation histories in the last 108 years. We find that both galaxies have substantial fractions of their optical light coming from massive stars and that Arp 248b may be dominated in the UV by WR stars. The UV spectra are dominated by radiation from evolved massive stars and we place an age on the burst in Arp 248b of a few tens of millions of years.

Type
IV. Observations of Global Activity due to Interaction
Information
International Astronomical Union Colloquium , Volume 124: Paired and Interacting Galaxies , 1990 , pp. 303 - 308
Copyright
Copyright © NASA 1990

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