Hostname: page-component-8448b6f56d-mp689 Total loading time: 0 Render date: 2024-04-23T21:51:34.767Z Has data issue: false hasContentIssue false
  • English
  • Français

The Very Unusual Ultraviolet Spectra of R Arae

Published online by Cambridge University Press:  12 April 2016

Yoji Kondo  and
George E. McCluskey
Yoji Kondo
Affiliation:
Laboratory for Astronomy and Solar Physics, NASA/GSFC Greenbelt, MD 20771, U.S.A.
George E. McCluskey
Affiliation:
Department of Mathematics, Lehigh University, Bethlehem, PA 18015, U.S.A.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The high resolution ultraviolet spectra of the 4.4-day period binary R Arae, observed in 1980 with the International Ultraviolet Explorer (IUE), show that its continuum flux level varied outside of eclipse by more than a factor of two in ten days, and by over 50 percent within a same orbital cycle. The flux level varied non-monotonically at different wavelengths. The resonance lines of Mg II and Si IV exhibited shortward–shifted absorption components near phase 0.4, indicating the presence of a gas stream toward the observer at a velocity of some –450 to –500 km s–1. Our observations of R Arae with the Einstein satellite show it to be an X–ray source.

Type
Part III: Evolutionary Processes in Close Binary Systems
Information
International Astronomical Union Colloquium , Volume 69: Binary and Multiple Stars as Tracers of Stellar Evolution , 1982 , pp. 321 - 326
Copyright
Copyright © Reidel 1982

References

Boggess, A. et al.: 1978, Nature 275, 377.CrossRefGoogle Scholar
Rondo, Y., McCluskey, G. E. and Stencel, R. E.: 1980, Astrophys. J. 233, 906.Google Scholar
Kondo, Y., McCluskey, G. E. and Harvel, C. H.: 1981, Astrophys. J. 247, 202.CrossRefGoogle Scholar
Kondo, Y., McCluskey, G. E. and Wu, C-C.: 1981, Astrophys. J. Suppl. in press (Dec. 1).Google Scholar
Sahade, J.: 1952, Astrophys. J. 116, 27.CrossRefGoogle Scholar