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The Ultrashort Period Dwarf Nova SW Ursae Majoris

Conference paper
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Abstract

SW UMa is an unusual dwarf nova in several respects. Recent observations by Robinson et al. (1986) have established that SW UMa is an SU UMa system, while Shafter, Szkody, and Thorstensen (1986) have presented evidence suggesting that SW UMa may be a DQ Her system as well. If the DQ Her classification is confirmed then SW UMa will be the only system to have this dual classification. Finally, time resolved spectroscopy of SW UMa has revealed the presence of an S-wave component in the Ha emission which has an unexpected phasing relative to the line wings.

References

  1. Gilliland, R. L., Kemper, E., and Suntzeff, N. 1986, Ap. J., 301, 252.ADSCrossRefGoogle Scholar
  2. Robinson, E. L., Shafter, A. W., Hill, J. A., Wood, M. A., and Mattei, J. A. 1986, Ap. J., submitted.Google Scholar
  3. Shafter, A. W. and Szkody, P. 1984, Ap. J., 276, 305.ADSCrossRefGoogle Scholar
  4. Shafter, A. W., Szkody, P., and Thorstensen, J. R. 1986, Ap. J., in press.Google Scholar
  5. Young, P. J., Schneider, D. P., Shectman, S. A. 1981, Ap. J., 245, 1035.ADSCrossRefGoogle Scholar

Copyright information

© D. Reidel Publishing Company 1987

Authors and Affiliations

  1. 1.Dept. of AstronomyUniversity of TexasAustinUSA
  2. 2.Dept. of AstronomyUniversity of WashingtonSeattleUSA
  3. 3.Dept. of Physics & AstronomyDartmouth CollegeHanoverUSA

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