The ultrashort period dwarf nova SW ursae majoris

Details The ultrashort period dwarf nova SW ursae majoris The ultrashort period dwarf nova SW ursae majoris

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.130..125s&link_type=abstract

Astrophysics and Space Science, Volume 130, Issue 1-2, pp. 125-126

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

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 Hα emission which has an unexpected phasing relative to the line wings.

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