The Zero Point of Extinction Toward Baade's Window From RR Lyrae Stars
Astrophysics
2009-10-30 v1
Abstract
We measure the zero point of the Stanek (1996) extinction map by comparing the observed (V-K) colors of 20 RR Lyrae stars (type ab) found in the MACHO survey with their intrinsic (V-K)_0 colors as a function of period as determined from nearby RR Lyrae stars. We find that the zero point of the Stanek map should be changed by \Delta A_V = -0.11 +/- 0.05 mag, in excellent agreement with the recent measurement of Gould, Popowski & Terndrup (1997) using K giants.
Cite
@article{arxiv.astro-ph/9706292,
title = {The Zero Point of Extinction Toward Baade's Window From RR Lyrae Stars},
author = {C. Alcock and R. A. Allsman and D. R. Alves and T. S. Axelrod and A. C. Becker and D. P. Bennett and K. H. Cook and K. C. Freeman and K. Griest and A. Gould and J. A. Guern and M. J. Lehner and S. L. Marshall and D. Minniti and B. A. Peterson and P. Popowski and M. R. Pratt and P. J. Quinn and A. W. Rodgers and C. W. Stubbs and W. Sutherland and T. Vandehei and D. L. Welch},
journal= {arXiv preprint arXiv:astro-ph/9706292},
year = {2009}
}
Comments
Submitted to ApJ, 18 pages including figures