Extinction Maps and Dust-to-Gas Ratios in Nearby Galaxies

  title={Extinction Maps and Dust-to-Gas Ratios in Nearby Galaxies},
  author={L. Kahre and R. Walterbos and H. Kim and D. Thilker and D. Calzetti and J. Lee and E. Sabbi and L. {\'U}beda and A. Aloisi and M. Cignoni and D. Cook and D. Dale and B. Elmegreen and D. Elmegreen and M. Fumagalli and J. Gallagher and D. Gouliermis and K. Grasha and E. Grebel and D. Hunter and E. Sacchi and L. Smith and M. Tosi and A. Adamo and J. Andrews and G. Ashworth and S. N. Bright and T. Brown and R. Chandar and C. Christian and S. D. Mink and C. Dobbs and A. Evans and A. Herrero and K. Johnson and R. Kennicutt and M. Krumholz and M. Messa and P. Nair and A. Nota and A. Pellerin and J. Ryon and D. Schaerer and F. Shabani and S. V. Dyk and B. Whitmore and A. Wofford},
We present a study of the dust-to-gas ratios in five nearby galaxies NGC 628 (M74), NGC 6503, NGC 7793, UGC 5139 (Holmberg I), and UGC 4305 (Holmberg II). Using Hubble Space Telescope broad band WFC3/UVIS UV and optical images from the Treasury program LEGUS (Legacy ExtraGalactic UV Survey) combined with archival HST/ACS data, we correct thousands of individual stars for extinction across these five galaxies using an isochrone-matching (reddening-free Q) method. We generate extinction maps for… Expand
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