Period-luminosity relationship for SX Phoenicis stars in Galactic globular clusters
Solar and Stellar Astrophysics
2012-11-26 v1
Abstract
We compiled a list of about 250 SX Phoenicis stars known in Galactic globular clusters in order to study period-luminosity relation for this type of variable. The absolute magnitudes of these stars are derived using metallicity-luminosity calibration for RR Lyrae stars. The mixture of different radial and non-radial modes present in SX Phoenicis stars and the lack of unique method of mode identification cause the difficulties in defining strict period-luminosity relation. As a solution we propose to use confirmed double-mode radial pulsators.
Keywords
Cite
@article{arxiv.1211.5465,
title = {Period-luminosity relationship for SX Phoenicis stars in Galactic globular clusters},
author = {Grzegorz Kopacki and Andrzej Pigulski},
journal= {arXiv preprint arXiv:1211.5465},
year = {2012}
}
Comments
2 pages, 1 figure, 20th Stellar Pulsation Conference Series - Impact of new instrumentation and new insights in stellar pulsations, Granada, 5-9 September 2011