Line profile variations caused by low-frequency non-radial pulsations of rapidly rotating stars: II

Umin Lee, C. Simon Jeffery, Hideyuki Saio

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Line profile variations caused by low-frequency non-radial 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 Å and He I 6678 Å. 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, travelling features have enough amplitude around the line centre to be consistent with observation.

Original languageEnglish
Pages (from-to)185-191
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Volume254
Issue number2
DOIs
Publication statusPublished - 1992
Externally publishedYes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'Line profile variations caused by low-frequency non-radial pulsations of rapidly rotating stars: II'. Together they form a unique fingerprint.

Cite this