Open Accessβ Cephei type variability in the ultraviolet spectrum and radial velocity of PHL 346
Author(s) -
Dufton P. L.,
Keenan F. P.,
Kilkenny D.,
O'Donoghue D.,
Parker Q. A.,
Van Wyk F.,
Van Leeuwen F.
Publication year - 1998
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.1998.01543.x
Subject(s) - physics , radial velocity , astrophysics , photometry (optics) , amplitude , ultraviolet , flux (metallurgy) , astronomy , spectral line , stars , optics , materials science , metallurgy
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.