AAS 195th Meeting, January 2000
Session 75. Intrinsic Variable Stars
Display, Friday, January 14, 2000, 9:20am-6:30pm, Grand Hall

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[75.03] A Photometric Study of the Peculiar Cepheid, V473 Lyrae

R. E. DeSimone, R. J. Dukes (Coll. Charleston)

In this paper we report on nine years of Stromgren 4-color observations of the peculiar Cepheid, V473 Lyrae. While this star has been described as a classical Cepheid (Fernie, 1982, PASP, 94,537) it does not fall into the category of orderly, well-behaved Cepheids. It is different in at least two aspects. It has the shortest period known for a classical Cepheid (Cabanela, 1991, JAAVSO, 20(1), 54) and it is the only known Cepheid which shows a long-term amplitude change (Burki and Mayor 1980, A&A, 91, 115). Van Hoolst and C. Waelkens (1995, A&A, 295, 361) attempted to explain the amplitude change of the star in a different way than the earlier common view of a beating between two closely spaced linear oscillation modes. Also Burki reported that V473 Lyrae had a decrease in the maximum amplitude and an increase in the minimum amplitude over time (Burki, 1994, A&A, 295, 361). We use our observations to investigate both of these claims. This work has been supported in part by NSF grants as #AST86-16362, #AST91-15114, #AST95-28906 to the College of Charleston.

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The author(s) of this abstract have provided an email address for comments about the abstract: ralphd@gateway.net

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