The radial pulsation of AI Aurigae

Citation
Ll. Kiss et Ba. Skiff, The radial pulsation of AI Aurigae, ASTRON ASTR, 370(2), 2001, pp. 496-502
Citations number
44
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
0004-6361 → ACNP
Volume
370
Issue
2
Year of publication
2001
Pages
496 - 502
Database
ISI
SICI code
0004-6361(200105)370:2<496:TRPOAA>2.0.ZU;2-D
Abstract
We present all analysis of eleven years of Stromgren by photometry of tile 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 cu rve shows semi-regular changes with a mean period of 65 days reaching an am plitude of 0(m).6 in some cycles. The b - y colour changes perfectly parall el the V light curve. suggesting radial oscillation to be the main reason f or the observed variations. We estimate the main characteristics of the sta r (mass.. radius, effective temperature) that suggest radial pulsation in f undamental or first overtone mode.