The Extinction Toward the Galactic Bulge from RR Lyrae Stars

Authors

Andrea Kunder, Dartmouth College
Piotr Popowski, Max Planck Institute for Astrophysics
Kem H. Cook, Institute of Geophysics and Planetary Physics
Brian Chaboyer, Dartmouth CollegeFollow

Document Type

Article

Publication Date

1-16-2008

Publication Title

The Astronomical Journal

Department

Department of Physics and Astronomy

Abstract

We present mean reddenings toward 3525 RR0 Lyrae stars from the Galactic bulge fields of the MACHO Survey. These reddenings are determined using the color at minimum V-band light of the RR0 Lyrae stars themselves and are found to be in general agreement with extinction estimates at the same location obtained from other methods. Using 3256 stars located in the Galactic Bulge, we derive the selective extinction coefficient R_V,VR = A_V/E(V − R) = 4.3 ± 0.2. This value is what is expected for a standard extinction law with R_V,BV = 3.1 ± 0.3.

DOI

10.1088/0004-6256/135/2/631

Original Citation

Andrea Kunder et al 2008 AJ 135 631

Dartmouth Digital Commons Citation

Kunder, Andrea; Popowski, Piotr; Cook, Kem H.; and Chaboyer, Brian, "The Extinction Toward the Galactic Bulge from RR Lyrae Stars" (2008). Dartmouth Scholarship. 2085.
https://digitalcommons.dartmouth.edu/facoa/2085