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Rapid Photometric and Spectroscopic Variability of the Be Star DX Eri

Published online by Cambridge University Press:  12 April 2016

S. Štefl  and
L. A. Balona
S. Štefl
Affiliation:
Astronomical Institute, Academy of Sciences, Ondřejov, Czech Republic
L. A. Balona
Affiliation:
South African Astronomical Observatory, P.O. Box 9, Observatory 7935, Cape, South Africa

Abstract

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Short-period variations of high-resolution He I 667.8 nm line profiles obtained on 5 nights are analysed and compared to extensive uvby photometry obtained during 1986 – 1993. The separation of short-period and medium-term light variations was done for 4 seasons. All prewhitened magnitudes can be phased with a single period of 1.2564 d. The radial velocity and the first moment of the He I 667.8 line follows the photometric period with a semi-amplitude of 42 km s−1. The large amplitude is very difficult to understand in terms of current models of non-radial pulsation or star spots.

Type
Part 2. Poster Papers
Information
International Astronomical Union Colloquium , Volume 155: Astrophysical Applications of Stellar Pulsation , 1995 , pp. 305 - 306
Copyright
Copyright © Astronomical Society of the Pacific 1995

References

Balona, L.A. 1990, MNRAS, 245, 92 CrossRefGoogle Scholar
Balona, L.A., Cuypers, J., & Marang, F. 1992, A&AS, 92, 533 Google Scholar
Štefl, S., Baade, D., Harmanec, P., & Balona, L.A. 1995, A&A, in pressGoogle Scholar