A Color-locus Method for Mapping $R_V$ Using Ensembles of Stars
Abstract
We present a simple but effective technique for measuring angular variation in across the sky. We divide stars from the Pan-STARRS1 catalog into Healpix pixels and determine the posterior distribution of reddening and for each pixel using two independent Monte Carlo methods. We find the two methods to be self-consistent in the limits where they are expected to perform similarly. We also find some agreement with high-precision photometric studies of in Perseus and Ophiuchus, as well as with a map of reddening near the Galactic plane based on stellar spectra from APOGEE. While current studies of are mostly limited to isolated clouds, we have developed a systematic method for comparing values for the majority of observable dust. This is a proof of concept for a more rigorous Galactic reddening map.x
Keywords
Cite
@article{arxiv.1803.09072,
title = {A Color-locus Method for Mapping $R_V$ Using Ensembles of Stars},
author = {Albert Lee and Gregory M. Green and Edward F. Schlafly and Douglas P. Finkbeiner and William Burgett and Ken Chambers and Heather Flewelling and Klaus Hodapp and Nick Kaiser and Rolf-Peter Kudritzki and Eugene Magnier and Nigel Metcalfe and Richard Wainscoat and Christopher Waters},
journal= {arXiv preprint arXiv:1803.09072},
year = {2018}
}
Comments
21 pages, 20 figures