The Instability Strip of M3
2000 ◽
Vol 176
◽
pp. 255-256
◽
Keyword(s):
Rr Lyrae
◽
AbstractWe present new multicolour CCD photometry of the central part of the globular cluster M3, mapping the precise position of ~ 120 RR Lyrae stars (RRab, RRd, RRc) on the horizontal branch (HB). The location of the double-mode variables (RRd) is in perfect agreement with recent theoretical results. We find a significant internal spread of metallicity amongst the RRab variables.
Mass-Loss During the RR Lyrae Phase of the HB: Mass Dispersion on the HB and RR Lyrae Period Changes
1993 ◽
Vol 139
◽
pp. 312-312
1989 ◽
Vol 111
◽
pp. 287-287