Year: 2010
Type: article
Abstract: We present measurements of reddening due to dust using the colors of stars in the Sloan Digital Sky Survey (SDSS). We measure the color of main-sequence turnoff stars by finding the "blue tip" of the stellar locus: the prominent blue edge in the distribution of stellar colors. The method is sensitive to color changes of order 18, 12, 7, and 8 mmag of reddening in the colors u − g , g − r , r − i , and i − z , respectively, in regions measuring 90' by 14'. We present maps of the blue tip colors in each of these bands over the entire SDSS footprint, including the new dusty southern Galactic cap data provided by the SDSS-III. The results disfavor the best-fit O'Donnell and Cardelli et al. reddening laws, but are described well by a Fitzpatrick reddening law with R V = 3.1. The Schlegel et al. (SFD) dust map is found to trace the dust well, but overestimates reddening by factors of 1.4, 1.0, 1.2, and 1.4 in u − g , g − r , r − i , and i − z largely due to the adopted reddening law. In select dusty regions of the sky, we find evidence for problems in the SFD temperature correction. A dust map normalization difference of 15% between the Galactic north and south sky may be due to these dust temperature errors.
Source: The Astrophysical Journal
Authors: Edward F. Schlafly, Douglas P. Finkbeiner, David J. Schlegel, Mario Jurić, Željko Ivezić, Robert R. Gibson, Gillian R. Knapp, Benjamin A. Weaver
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Alfred P. Sloan Foundation, Yale University, Vanderbilt University, Princeton University, Ohio State University, University of Washington, Johns Hopkins University, University of Portsmouth, New Mexico State University, Space Telescope Science Institute, York University, College of Engineering, Michigan State University, Brookhaven National Laboratory, Lawrence Berkeley National Laboratory
Awards: Structure and activation mechanism of mammalian prestin, Investigations on Electrode/Electrolyte Interfacial Reactions in Localized High-Concentration Electrolytes for Various Energy Storage Chemistries, G433322167, G4518818167, Towards a Panoramic 7-D Map of the Milky Way, G58316358, WE PROPOSE TO UPDATE THE MOST WIDELY USED MAP OF GALACTIC DUST (SCHLEGEL FINKBEINER DAVIS 1998; SF, G6273510985, G767601387
OpenAlex ID: W2950113625