Abstract Details
| Name: Richa Kundu Affiliation: University of Delhi Conference ID: ASI2016_615 Title : Examining empirical metallicity-Fourier parameter relations for RR Lyrae stars Authors and Co-Authors : Richa Kundu, Harinder P. Singh, Shashi M. Kanbur. Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : RR Lyrae stars are tracers for the old stellar populations present in various environments. They are quite numerous. They have characteristic light curves which are relatively easy to observe due to their short periods and large amplitudes. They are useful in determining the galactic and extragalactic distances and for studying the structure of the Milky Way and other galaxies. RR Lyrae variables are radially pulsating horizontal branch stars, with periods in the range of 0.2–1.0 d and are classified into three main types according to the mode in which they pulsate: fundamental-mode RRab stars, first-overtone RRc stars and double-mode RRd stars.Determination of spectroscopic metallicities for these stars is expensive. Attempts have, therefore, been made to determine metallicities of RRab stars by relating these with the light curve structure through the Fourier parameters (Jurcsik & Kovacs, 1996; Nemec et al. 2013). We examine these empirical relations by using archival photometric and spectroscopic data. |