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Star Formation in Infrared Bright and Infrared Faint Starburst Interacting Galaxies

  • Susan A. Lamb (a1) (a2), Howard A. Bushouse (a3) and John W. Towns (a1)

Abstract

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.

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Copyright

References

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Armus, L., Heckman, T. M., and Miley, G. K. (1988) Ap.J., 326, L45.
Bushouse, H. A. (1986) Ph.D. thesis, University of Illinois.
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Bushouse, H. A. (1987) Ap.J., 320, 49.
Bushouse, H. A., Lamb, S. A., and Werner, M. W. (1988) ApJ., 335, 74.
Lamb, S. A., Hunter, D. A., and Gallagher, J. S. (1990) submitted to Ap. J.
Nussbaumer, H., Schmutz, W., Smith, L. J., and Willis, A. J. (1982) Astron. Astrophs. Suppl., 47, 257.
Sanders, D. B., Soifer, B. T., Elias, J. H., Madore, B. F., Matthews, K., Neugebauer, G., and Scoville, N. Z. (1988) Ap.J., 325, 74.
Wu, C.-C. et al. (1983) IUE Ultraviolet Spectral Atlas, IUE NASA Newsletter No. 22.

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Star Formation in Infrared Bright and Infrared Faint Starburst Interacting Galaxies

  • Susan A. Lamb (a1) (a2), Howard A. Bushouse (a3) and John W. Towns (a1)

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