Infrared Surface Brightness Distances to Cepheids
Astrophysics
2007-05-23 v1
Abstract
Bayesian statistical calculations and linear-bisector calculations for obtaining Cepheid distances and radii by the infrared surface brightness method have been compared for a set of 38 Cepheids. The distances obtained by the two techniques agree to 1.5%+/-0.6% and the radii agree to 1.1%+/-0.7%. Thus the two methods yield the same distances and radii at the 2 sigma level. This implies that the short distance to the LMC found in recent linearbisector studies of Cepheids is not a result of simplifications in the mathematical approach. The computed uncertainties in distance and radius are larger in the Bayesian calculation typically by a factor of three.
Cite
@article{arxiv.astro-ph/0509639,
title = {Infrared Surface Brightness Distances to Cepheids},
author = {Thomas G. Barnes and Jesper Storm and William H. Jefferys and Wolfgang P. Gieren and Pascal Fouque},
journal= {arXiv preprint arXiv:astro-ph/0509639},
year = {2007}
}
Comments
4 pages, 4 figures, conference contribution