AAS 206th Meeting, 29 May - 2 June 2005
Session 41 Variable Stars
Poster, Wednesday, 10:00am-7:00pm, Thursday, 9:20am-2:00pm, June 1, 2005, Ballroom A

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[41.03] [Fe/H] - \phi31 - Period relation for c-type RR Lyrae Variables

J. N. Wahl, S. M. Morgan, R. M. Wieckhorst (Univ. of Northern Iowa)

A [Fe/H] - \phi31 - Period relation is found for c-type RR Lyra stars in globular clusters. The relation is analogous to that found by Jurcsik & Kovacs (1996) for field ab-type RR Lyra stars, where a larger period correlates with lower metallicity values for similar values of the Fourier coefficient \phi31. The metallicity of field c-type RR Lyra stars and those within \omega Cen are also examined using the new relation and these results are also presented.

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Bulletin of the American Astronomical Society, 37 #2
© 2005. The American Astronomical Soceity.