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A spectroscopic study of the cataclysmic binary star SU Ursae Majoris

1986; IOP Publishing; Volume: 309; Linguagem: Inglês

10.1086/164641

1538-4357

J. R. Thorstensen, R. A. Wade, J. B. Oke,

Stellar, planetary, and galactic studies

view Abstract Citations (45) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Spectroscopic Study of the Cataclysmic Binary Star SU Ursae Majoris Thorstensen, John R. ; Wade, Richard A. ; Oke, J. B. Abstract The authors report spectroscopic observations of SU UMa, the prototype of a class of short-period cataclysmic binaries. From Hα radial velocity observations, they find the orbital period to be 0.076351±4.3×10-5days (= 110 minutes). They also present an analysis of high-quality spectrograms from the Hale 5 m telescope and double spectrograph. The velocity amplitude of the emission line source is 58±4 km s-1, leading to a mass function ≡1.5×10-3M_sun;. The velocity widths of the Balmer series increase toward higher members of the series, which suggests that pressure broadening may contribute nonnegligibly to the emission line widths. Publication: The Astrophysical Journal Pub Date: October 1986 DOI: 10.1086/164641 Bibcode: 1986ApJ...309..721T Keywords: Astronomical Spectroscopy; Cataclysmic Variables; Dwarf Novae; Stellar Spectra; Continuous Spectra; Ephemerides; H Alpha Line; H Beta Line; Line Spectra; Radial Velocity; Stellar Orbits; Astrophysics full text sources ADS | data products SIMBAD (2)