Statistics – Computation
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.254..185l&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 254, Jan. 15, 1992, p. 185-191. Research supported by S
Statistics
Computation
26
Computational Astrophysics, Line Spectra, Stellar Oscillations, Stellar Rotation, Absorption Spectra, Local Thermodynamic Equilibrium, Spectral Line Width, Temperature Dependence
Scientific paper
Line profile variations caused by low-frequency nonradial pulsations of rapidly rotating stars have been calculated, which take into account the temperature dependence of the absorption line equivalent width. Test calculations have been made for Si III 4553 A and He I 6678 A. The relative amplitude of temperature variation has been assumed to be comparable to the amplitude of velocity variation relative to the equatorial rotation velocity, which is reasonable for low-frequency oscillations because of the boundary condition. It is found that the effects of temperature variation exceed that of velocity variation in line profile variations. Consequently, traveling features have enough amplitude around the line center to be consistent with observations.
Jeffery Simon C.
Lee Umin
Saio Hideyuki
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