Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-03-04
Astronomy and Astrophysics
Astrophysics
24 pages, 3 tables, 7 figures (6 in color), version accepted to AJ, added comparisons with Schlegel et al. (1998) and Dutra et
Scientific paper
10.1086/379291
We present a (V-R)-based reddening map of about 43 square degrees of the Galactic bulge/bar. The map is constructed using template image photometry from the MACHO microlensing survey, contains 9717 resolution elements, and is based on (V-R)-color averages of the entire color-magnitude diagrams (CMDs) in 4 by 4 arc-minute tiles. The conversion from the observed color to the reddening follows from an assumption that CMDs of all bulge fields would look similar in the absence of extinction. Consequently, the difference in observed color between various fields originates from varying contribution of the disk extinction summed along different lines of sight. We check that our (V-R) colors correlate very well with infrared and optical reddening maps. We show that a dusty disk obeying a cosec|b| extinction law, E(V-R) = 0.0274 cosec|b|, provides a good approximation to the extinction toward the MACHO bulge/bar fields. The large-scale (V-R)-color and visual extinction map presented here is publicly available in the electronic edition of the Journal and on the World Wide Web.
Becker Andrew
Cook Kem
Popowski Piotr
No associations
LandOfFree
The Large-Scale Extinction Map of the Galactic Bulge from the MACHO Project Photometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Large-Scale Extinction Map of the Galactic Bulge from the MACHO Project Photometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Large-Scale Extinction Map of the Galactic Bulge from the MACHO Project Photometry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-479602