Pulsating Variable Stars in the MACHO Bulge database: The Semiregular Variables
Astrophysics
2007-05-23 v1
Abstract
We review the pulsating stars contained in the top 24 fields of the MACHO bulge database, with special emphasis on the red semiregular stars. Based on period, amplitude and color cuts, we have selected a sample of 2000 semiregular variables with days. Their color-magnitude diagram is presented, and period-luminosity relation is studied, as well as their spatial distribution. We find that they follow the bar, unlike the RR Lyrae in these fields.
Keywords
Cite
@article{arxiv.astro-ph/9712048,
title = {Pulsating Variable Stars in the MACHO Bulge database: The Semiregular Variables},
author = {D. Minniti and C. Alcock and R. A. Allsman and D. R. Alves and T. S. Axelrod and A. Becker and D. P. Bennett and K. H. Cook and K. C. Freeman and K. Griest and S. L. Marshall and B. A. Peterson and M. R. Pratt and P. J. Quinn and A. W. Rodgers and C. W. Stubbs and W. Sutherland and A. Tomaney and T. Vandehei and D. L. Welch},
journal= {arXiv preprint arXiv:astro-ph/9712048},
year = {2007}
}
Comments
12 pages, 8 PostScript figures, uses jd24.sty. Invited review for IAU-JD24, to appear in: Pulsating Stars - Recent Developments in Theory and Observation, 1998, eds. M. Takeuti, D. Sasselov, (Universal Academy Press: Tokyo)