Tomography of stellar non-radial pulsations

Details Tomography of stellar non-radial pulsations Tomography of stellar non-radial pulsations

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004an....325..237b&link_type=abstract

Astronomische Nachrichten, Vol.325, Issue 3, p.237-240

Astronomy and Astrophysics

Astronomy

Stars: Imaging, Stars: Oscillations, Techniques: Spectroscopy

Scientific paper

The stellar surface imaging technique is used for studying stellar non-radial pulsations on the basis of inversions of time series of variable line profiles without making assumptions on the specific shape of the pulsations. The inversion results in an image of the stellar surface in which sectoral and tesseral modes can be distinguished in many cases and the pulsational degree and the azimuthal order can be determined. The capability of the technique is studied with simulated data. Then, the surface imaging technique is applied to high-resolution spectra of the rapidly rotating Beta Cep-type star ω1 Sco, which shows strong line-profile variations. Stellar surface imaging is concluded to be a useful technique for pulsation-mode identification.

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