Rapid Photometric and Spectroscopic Variability of the Be Star DX Eri

S. Štefl, L. A. Balona
1995 International Astronomical Union Colloquium  
AbstractShort-period variations of high-resolution He I 667.8 nm line profiles obtained on 5 nights are analysed and compared to extensiveuvbyphotometry 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
more » ... ery difficult to understand in terms of current models of non-radial pulsation or star spots.
doi:10.1017/s0252921100037222 fatcat:itznwzvufrc2no45ae3u74dspq