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Astron. Astrophys. 356, 209-212 (2000)

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Line-profile variation in [FORMULA] Herculis

Seiji Masuda and Ryuko Hirata

Department of Astronomy, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan (masuda@kusastro.kyoto-u.ac.jp; hirata@kusastro.kyoto-u.ac.jp)

Received 23 December 1998 / Accepted 31 January 2000


Based on a time series of high-resolution spectra at HeI  [FORMULA]4471 and MgII  [FORMULA]4481, we have detected the line-profile variation of [FORMULA] Her, one of the newly discovered Slowly Pulsating B Stars by Hipparcos.

A period analysis has been performed for the radial velocities of MgII  [FORMULA]4481. A best estimated period of 1.17 d or its one-day alias 0.536 d is different from its photometric period (1.25 d) derived from the Hipparcos mission.

Key words: line: profiles – stars: early-type – stars: oscillations – stars: variables: general – stars: individual: o Her

Send offprint requests to: S. Masuda

© European Southern Observatory (ESO) 2000

Online publication: March 28, 2000