Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.7503d&link_type=abstract
American Astronomical Society, 195th AAS Meeting, #75.03; Bulletin of the American Astronomical Society, Vol. 31, p.1480
Astronomy and Astrophysics
Astronomy
Scientific paper
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.
DeSimone R. E.
Dukes Robert J. Jr.
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