Non-radial pulsation models of the H-alpha profile in BW Vulpeculae

Details Non-radial pulsation models of the H-alpha profile in BW Vulpeculae Non-radial pulsation models of the H-alpha profile in BW Vulpeculae

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ssrv...27..345o&link_type=abstract

(International Astronomical Union, Colloquium on Stellar Hydrodynamics, 58th, Los Alamos, N. Mex., Aug. 12-15, 1980.) Space Scie

Astronomy and Astrophysics

Astronomy

5

H Alpha Line, Stellar Models, Stellar Oscillations, Stellar Radiation, Variable Stars, B Stars, Line Spectra, O Stars, Radial Velocity, Stellar Spectra

Scientific paper

The profile of the Hydrogen alpha spectral line in the large-amplitude Beta Cephei star BW Vulpeculae was modeled in terms of a linear, non-radially moving, and rotating stellar atmosphere. The pulsation and rotation parameters were derived from fitting the radial velocity amplitude, and the best fit was obtained for l = 2, m = -2, i = 90 deg, rotation velocity = 120 km/sec, and pulsation amplitude = 27 km/sec. When the line profiles are compared to this model, the fit is satisfactory for most phases, but several discrepancies remain. It is not clear whether these can be made to disappear by increasing the sophistication of the model, or whether a completely different physical model (e.g. radial) is necessary.

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