An interpretation of the unique triple mode variable AC Andromedae as an RR Lyrae type star oscillating in the first three radial over-tones.
Abstract
A new interpretation of the observed periods in AC Andromedae as the first three radial over-tones is investigated. It is shown that this mode identification agrees well with a stellar model of about 0.5 solar masses belonging to the suprahorizontal branch. In this picture AC Andromedae is a c-type RR Lyrae variable. Further observational tests of this possibility are considered.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 1978
- Bibcode:
- 1978A&A....65..451P
- Keywords:
-
- Cepheid Variables;
- Hertzsprung-Russell Diagram;
- Periodic Variations;
- Stellar Models;
- Astronomical Models;
- Interpretation;
- Modal Response;
- Stellar Evolution;
- Stellar Mass;
- Astrophysics;
- Pulsations:Variables