Search: onr:"swepub:oai:DiVA.org:su-156111" >
Extinction Maps and...
Extinction Maps and Dust-to-gas Ratios in Nearby Galaxies with LEGUS
-
Kahre, L. (author)
-
Walterbos, R. A. (author)
-
Kim, H. (author)
-
show more...
-
Thilker, D. (author)
-
Calzetti, D. (author)
-
Lee, J. C. (author)
-
Sabbi, E. (author)
-
Ubeda, L. (author)
-
Aloisi, A. (author)
-
Cignoni, M. (author)
-
Cook, D. O. (author)
-
Dale, D. A. (author)
-
Elmegreen, B. G. (author)
-
Elmegreen, D. M. (author)
-
Fumagalli, M. (author)
-
Gallagher, J. S. (author)
-
Gouliermis, D. A. (author)
-
Grasha, K. (author)
-
Grebel, E. K. (author)
-
Hunter, D. A. (author)
-
Sacchi, E. (author)
-
Smith, L. J. (author)
-
Tosi, M. (author)
-
- Adamo, Angela (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
-
Andrews, J. E. (author)
-
Ashworth, G. (author)
-
Bright, S. N. (author)
-
Brown, T. M. (author)
-
Chandar, R. (author)
-
Christian, C. (author)
-
de Mink, S. E. (author)
-
Dobbs, C. (author)
-
Evans, A. S. (author)
-
Herrero, A. (author)
-
Johnson, K. E. (author)
-
Kennicutt, R. C. (author)
-
Krumholz, M. R. (author)
-
- Messa, Matteo (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
-
Nair, P. (author)
-
Nota, A. (author)
-
Pellerin, A. (author)
-
Ryon, J. E. (author)
-
Schaerer, D. (author)
-
Shabani, F. (author)
-
Van Dyk, S. D. (author)
-
Whitmore, B. C. (author)
-
Wofford, A. (author)
-
show less...
-
(creator_code:org_t)
- 2018-03-16
- 2018
- English.
-
In: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 855:2
- Related links:
-
https://boa.unimib.i...
-
show more...
-
https://urn.kb.se/re...
-
https://doi.org/10.3...
-
show less...
Abstract
Subject headings
Close
- 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 broadband WFC3/UVIS UV and optical images from the Treasury program Legacy ExtraGalactic UV Survey (LEGUS) combined with archival HST/Advanced Camera for Surveys 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 each galaxy from the individual stellar extinctions using both adaptive and fixed resolution techniques and correlate these maps with neutral H I and CO gas maps from the literature, including the H I Nearby Galaxy Survey and the HERA CO-Line Extragalactic Survey. We calculate dust-to-gas ratios and investigate variations in the dust-to-gas ratio with galaxy metallicity. We find a power-law relationship between dust-to-gas ratio and metallicity, consistent with other studies of dust-to-gas ratio compared to metallicity. We find a change in the relation when H-2 is not included. This implies that underestimation of N-H2 in low-metallicity dwarfs from a too-low CO-to-H-2 conversion factor X-CO could have produced too low a slope in the derived relationship between dust-to-gas ratio and metallicity. We also compare our extinctions to those derived from fitting the spectral energy distribution (SED) using the Bayesian Extinction and Stellar Tool for NGC 7793 and find systematically lower extinctions from SED fitting as compared to isochrone matching.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- dust
- extinction
- galaxies: dwarf
- galaxies: ISM
- galaxies: photometry
- galaxies: spiral
- ISM: general
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
-
Kahre, L.
-
Walterbos, R. A.
-
Kim, H.
-
Thilker, D.
-
Calzetti, D.
-
Lee, J. C.
-
show more...
-
Sabbi, E.
-
Ubeda, L.
-
Aloisi, A.
-
Cignoni, M.
-
Cook, D. O.
-
Dale, D. A.
-
Elmegreen, B. G.
-
Elmegreen, D. M.
-
Fumagalli, M.
-
Gallagher, J. S.
-
Gouliermis, D. A ...
-
Grasha, K.
-
Grebel, E. K.
-
Hunter, D. A.
-
Sacchi, E.
-
Smith, L. J.
-
Tosi, M.
-
Adamo, Angela
-
Andrews, J. E.
-
Ashworth, G.
-
Bright, S. N.
-
Brown, T. M.
-
Chandar, R.
-
Christian, C.
-
de Mink, S. E.
-
Dobbs, C.
-
Evans, A. S.
-
Herrero, A.
-
Johnson, K. E.
-
Kennicutt, R. C.
-
Krumholz, M. R.
-
Messa, Matteo
-
Nair, P.
-
Nota, A.
-
Pellerin, A.
-
Ryon, J. E.
-
Schaerer, D.
-
Shabani, F.
-
Van Dyk, S. D.
-
Whitmore, B. C.
-
Wofford, A.
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
- Articles in the publication
-
Astrophysical Jo ...
- By the university
-
Stockholm University