Revision of the [Fe/H]-φ31-P relationship for RRc variables
stars: abundances, stars: variables: other
Proceedings of the International Astronomical Union
The relationship derived by Morgan et al. (2007) for type-c RR Lyrae variables (RRc) between values of [Fe/H]-φ31-P has been revised and expanded. New relationships are based upon Fourier coefficients of 163 RRc variables in 19 Galactic globular clusters using the metallicity scales of Harris (2010), Zinn & West (1984) and Carretta et al. (2009). This larger database includes more low-metallicity clusters ([Fe/H] <-2.0), and the best fitting relations are found to depend upon values of log P rather than P. The new relations are applied to various populations of RRc including Milky Way field variables, LMC globular clusters variables, ω Cen RRc, and RRc in various OGLE III databases. Copyright © International Astronomical Union 2014.
Original Publication Date
DOI of published version
Morgan, Siobahn, "Revision of the [Fe/H]-φ31-P relationship for RRc variables" (2014). Faculty Publications. 1396.