2175 Å Dust Map of the Milky Way

Details 2175 Å Dust Map of the Milky Way 2175 Å Dust Map of the Milky Way

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725007h&link_type=abstract

American Astronomical Society, AAS Meeting #217, #250.07; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

The mean extinction curve of the Milky Way dust exhibits a pronounced bump at 2175 Å which is weaker in the LMC and absent in the SMC. Studies along individual lines of sight show significant variation in the strength of the bump within the Milky Way as well. We present a map of 2175 Å strength variation in the north galactic cap. The map is created using SDSS photometry and spectroscopy of stars to estimate their UV colors. These predicted model colors are compared to observed GALEX UV colors to infer the strength of the 2175 Å bump. We acknowledge funding from the NASA GALEX GI program.

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