2007/12/03 by Andrea Kunder, Piotr Popowski, Kem H. Cook +1
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Bulge #Extinction (optical mineralogy) #Galaxies: Formation, Evolution, Phenomena #Globular cluster #Optics #Physics #RR Lyrae variable #Red clump #Stars #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1088/0004-6256/135/2/631
4 Figures, accepted to AJ
arxiv created 2007/12/03 · openalex publication_date 2008/01/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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.