Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.8413b&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #84.13; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
Surveys of stellar reddening (or color excess) often use data gleaned from various heterogeneous sets of photometry and spectral type and are therefore subject to large sources of unpredictable uncertainty. We have taken advantage of the Sloan Digital Sky Survey, which will eventually provide spectra and photometry for several hundred thousand stars distributed over more than a quarter of the sky, to calculate reddening. We find a correlation between intrinsic colors and the strength of hydrogen spectral lines for stars in the low extinction regions, as given by the SFD maps, and use it to independently estimate reddening for stars in the high extinction regions. Intrinsic color and therefore reddening is estimated to within about 0.05 mag or better for over 20,000 stars. This method of calculating reddening is more accurate over a larger set of stars than previous studies have accomplished. In future work, we will use this method to map interstellar extinction over the SDSS survey area and test current understanding of the normalized extinction curve.
Boyles Jennifer G.
Ivezic Zeljko
Larson Kristen Anne
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