Journal Article

β Cephei type variability in the ultraviolet spectrum and radial velocity of PHL 346

P. L. Dufton, F. P. Keenan, D. Kilkenny, D. O'Donoghue, Q. A. Parker, F. van Wyk and F. van Leeuwen

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 297, issue 2, pages 565-569
Published in print June 1998 | ISSN: 0035-8711
Published online June 1998 | e-ISSN: 1365-2966 | DOI:
β Cephei type variability in the ultraviolet spectrum and radial velocity of PHL 346

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International Ultraviolet Explorer low-resolution and optical moderate-resolution spectra are presented for the high galactic latitude β Cephei type star, PHL 346. Variability is identified in both the ultraviolet flux and the radial velocity with periods and phases consistent with those previously deduced from optical photometry. The similarity of both the flux and the radial velocity amplitude to those previously reported for the β Cephei variable, γ Pegasus, is striking and provides evidence for PHL 346 being a young core hydrogen burning star. A distance estimate for PHL 346 of approximately 7 kpc (corresponding to a z-distance of approximately 6 kpc) is obtained by scaling the distance of γ Pegasus obtained from Hipparcos observations.

Keywords: stars: AGB and post-AGB; stars: early-type; stars: individual: PHL 346; stars: variables: other; ultraviolet: stars

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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