The Extinction Toward the Galactic Bulge from RR Lyrae Stars

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 $R_{V,VR}=A_V/E(V-R)=4.3\pm 0.2$. This value is what is expected for a standard extinction law with $R_{V,BV}=3.1\pm 0.3$.

4 Figures, accepted to AJ

Cited by in corpus (9)

• Mapping the Milky Way bulge at high resolution: the 3D dust extinction, CO, and X factor maps
• Variable stars in the VVV globular clusters. I. 2MASS-GC02 and Terzan10
• Clustering of Local Group distances: publication bias or correlated measurements? IV. The Galactic Center
• Distance to the Sagittarius Dwarf Galaxy using MACHO Project RR Lyrae stars
• Extinction Maps towards the Milky Way Bulge: 2D and 3D Tests with APOGEE
• Metallicity Analysis of MACHO Galactic Bulge RR0 Lyrae stars from their Lightcurves
• Kinematics of the Palomar 5 stellar stream from RR Lyrae stars
• Bulge RR Lyrae stars in the VVV tile $\text{b201}$
• The Galactic Bulge exploration IV.: RR~Lyrae stars as traces of the Galactic bar -- 3D and 5D analysis, extinction variation