Infrared Surface Brightness Distances to Cepheids

Details Infrared Surface Brightness Distances to Cepheids Infrared Surface Brightness Distances to Cepheids

2005-09-21

arxiv.org/abs/astro-ph/0509639v1

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, conference contribution

Scientific paper

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.

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