The radial pulsation of AI Aurigae
Abstract
We present an analysis of eleven years of Strömgren by photometry of the red semiregular variable star AI Aurigae. An early period determination of 63.9 days is confirmed by the long-term light curve behaviour. The light curve shows semi-regular changes with a mean period of 65 days reaching an amplitude of 0\fm6 in some cycles. The b-y colour changes perfectly parallel the V light curve, suggesting radial oscillation to be the main reason for the observed variations. We estimate the main characteristics of the star (mass, radius, effective temperature) that suggest radial pulsation in fundamental or first overtone mode.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 2001
- DOI:
- 10.1051/0004-6361:20010237
- arXiv:
- arXiv:astro-ph/0102231
- Bibcode:
- 2001A&A...370..496K
- Keywords:
-
- STARS: PULSATION;
- STARS: AGB;
- STARS: INDIVIDUAL: AI AUR;
- Astrophysics
- E-Print:
- 7 pages, 3 figures, accepted for publication in A&