V371 Per — A thick-disk, short-period F/1O Cepheid

Authors

P. Wils, Vereniging voor Sterrenkunde, Belgium;Follow
A. A. Henden, American Association of Variable Star Observers, Cambridge, MAFollow
S. Kleidis, Zagori Observatory, Epirus, GreeceFollow
Edward G. Schmidt, University of Nebraska-LincolnFollow
D. L. WelchFollow

Date of this Version

1-2010

Comments

Published in Monthly Notices of the Royal Astronomical Society 402:2, pp. 1156–1160; doi: 10.1111/j.1365-2966.2009.15941.x Copyright © 2010 P. Wils, A. A. Henden, S. Kleidis, E. G. Schmidt, and D. L. Welch; published by RAS and Wiley-Blackwell. Used by permission.

Abstract

V371 Per was found to be a double-mode Cepheid with a fundamental mode period of 1.738 days, the shortest among Galactic beat Cepheids, and an unusually high period ratio of 0.731, while the other Galactic beat Cepheids have period ratios between 0.697 and 0.713. The latter suggests that the star has a metallicity [Fe/H] between −1 and −0.7. The derived distance from the Galactic plane places it in the thick disk or the Halo, while all other Galactic beat Cepheids belong to the thin disk. There are indications from historical data that both the fundamental and first overtone periods have lengthened.