The light and velocity curve bumps for BW Vulpeculae

Details The light and velocity curve bumps for BW Vulpeculae The light and velocity curve bumps for BW Vulpeculae

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ssrv...27..337p&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

2

Cepheid Variables, Light Curve, Radial Velocity, Stellar Luminosity, Stellar Oscillations, Hertzsprung-Russell Diagram, Nonlinear Equations, Stellar Evolution, Stellar Mass, Stellar Models

Scientific paper

BW Vulpeculae (HD 199140) is a well known Beta Cephei star, with several unusual characteristics. It possesses the largest amplitude in both light and radial velocity variations of any star in this classification. The most outstanding feature of the observations is a standstill, or bump, on the light curve, accompanied by doubled lines in the radial velocity observations. In this paper, an attempt has been made to explain these phenomena with two different models: firstly, the resonance mechanism, from Simon and Schmidt (1976), and secondly, a nonlinear calculation.

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