Abstract
DY Peg is probably the best observed SX Phe star ever. It is one of this type’s not very numerous galactic field stars. This paper uses newly gathered observations from the decade after the last published work and presents at first an extended revision of the fundamental period behavior. It turns out that a model comprising sudden period changes followed by sections with constant period length describes the way the (O-C) values behave better than the assumption of a constant amount of change, with or without a superposition with lighttime effects due to an orbiting companion. Following this, a frequency analysis reveals that the star pulsates in fundamental and first overtone radial modes and shows evidence for additional non-radial oscillations. Finally, the binary and evolutionary status of DY Peg is evaluated.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callSimilar Papers
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
