Open Access[Fe/H] relations for c‐type RR Lyrae variables based upon Fourier coefficients
Author(s) -
Morgan Siobahn M.,
Wahl Jennifer N.,
Wieckhorst Rachel M.
Publication year - 2007
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2006.11247.x
Subject(s) - rr lyrae variable , physics , metallicity , astrophysics , globular cluster , cepheid variable , large magellanic cloud , variable star , stars , astronomy
[Fe/H]–φ 31 – P relations are found for c‐type RR Lyrae stars in globular clusters. The relations are analogous to that found by Jurcsik & Kovács for field ab‐type RR Lyrae stars, where a longer period correlates with lower metallicity values for similar values of the Fourier coefficient φ 31 . The relations obtained here are used to determine the metallicity of field c‐type RR Lyrae stars, those within ω Cen, the Large Magellanic Cloud and toward the galactic bulge. The results are found to compare favourably to metallicity values obtained elsewhere.