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dc.contributor.authorKahre, Len
dc.contributor.authorWalterbos, RAen
dc.contributor.authorKim, Hen
dc.contributor.authorThilker, Den
dc.contributor.authorCalzetti, Den
dc.contributor.authorLee, JCen
dc.contributor.authorSabbi, Een
dc.contributor.authorUbeda, Len
dc.contributor.authorAloisi, Aen
dc.contributor.authorCignoni, Men
dc.contributor.authorCook, DOen
dc.contributor.authorDale, DAen
dc.contributor.authorElmegreen, BGen
dc.contributor.authorElmegreen, DMen
dc.contributor.authorFumagalli, Men
dc.contributor.authorGallagher, JSen
dc.contributor.authorGouliermis, DAen
dc.contributor.authorGrasha, Ken
dc.contributor.authorGrebel, EKen
dc.contributor.authorHunter, DAen
dc.contributor.authorSacchi, Een
dc.contributor.authorSmith, LJen
dc.contributor.authorTosi, Men
dc.contributor.authorAdamo, Aen
dc.contributor.authorAndrews, JEen
dc.contributor.authorAshworth, Gen
dc.contributor.authorBright, SNen
dc.contributor.authorBrown, TMen
dc.contributor.authorChandar, Ren
dc.contributor.authorChristian, Cen
dc.contributor.authorDe Mink, SEen
dc.contributor.authorDobbs, Cen
dc.contributor.authorEvans, ASen
dc.contributor.authorHerrero, Aen
dc.contributor.authorJohnson, KEen
dc.contributor.authorKennicutt, Roberten
dc.contributor.authorKrumholz, MRen
dc.contributor.authorMessa, Men
dc.contributor.authorNair, Pen
dc.contributor.authorNota, Aen
dc.contributor.authorPellerin, Aen
dc.contributor.authorRyon, JEen
dc.contributor.authorSchaerer, Den
dc.contributor.authorShabani, Fen
dc.contributor.authorVan Dyk, SDen
dc.contributor.authorWhitmore, BCen
dc.contributor.authorWofford, Aen
dc.date.accessioned2018-06-12T13:25:12Z
dc.date.available2018-06-12T13:25:12Z
dc.date.issued2018-03-10en
dc.identifier.issn0004-637X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/276937
dc.description.abstractWe 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 each galaxy from the individual stellar extinctions using both adaptive and fixed resolution techniques, and correlate these maps with neutral HI and CO gas maps from literature, including The HI Nearby Galaxy Survey (THINGS) and the HERA CO-Line Extragalactic Survey (HERACLES). 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 $N_{H_2}$ 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 (BEAST) for NGC 7793 and find systematically lower extinctions from SED-fitting as compared to isochrone matching.
dc.publisherIOP Publishing
dc.titleExtinction Maps and Dust-to-gas Ratios in Nearby Galaxies with LEGUSen
dc.typeArticle
prism.issueIdentifier2en
prism.publicationDate2018en
prism.publicationNameAstrophysical Journalen
prism.volume855en
dc.identifier.doi10.17863/CAM.24219
dcterms.dateAccepted2018-02-15en
rioxxterms.versionofrecord10.3847/1538-4357/aab101en
rioxxterms.versionVoR*
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2018-03-10en
dc.contributor.orcidKahre, L [0000-0002-2037-3096]
dc.contributor.orcidWalterbos, RA [0000-0002-0782-3064]
dc.contributor.orcidKim, H [0000-0003-4770-688X]
dc.contributor.orcidThilker, D [0000-0002-8528-7340]
dc.contributor.orcidCalzetti, D [0000-0002-5189-8004]
dc.contributor.orcidLee, JC [0000-0002-2278-9407]
dc.contributor.orcidSabbi, E [0000-0003-2954-7643]
dc.contributor.orcidAloisi, A [0000-0003-4137-882X]
dc.contributor.orcidCignoni, M [0000-0001-6291-6813]
dc.contributor.orcidCook, DO [0000-0002-6877-7655]
dc.contributor.orcidDale, DA [0000-0002-5782-9093]
dc.contributor.orcidElmegreen, BG [0000-0002-1723-6330]
dc.contributor.orcidElmegreen, DM [0000-0002-1392-3520]
dc.contributor.orcidFumagalli, M [0000-0001-6676-3842]
dc.contributor.orcidGallagher, JS [0000-0001-8608-0408]
dc.contributor.orcidGouliermis, DA [0000-0002-2763-0075]
dc.contributor.orcidGrasha, K [0000-0002-3247-5321]
dc.contributor.orcidGrebel, EK [0000-0002-1891-3794]
dc.contributor.orcidHunter, DA [0000-0002-3322-9798]
dc.contributor.orcidSacchi, E [0000-0001-5618-0109]
dc.contributor.orcidSmith, LJ [0000-0002-0806-168X]
dc.contributor.orcidTosi, M [0000-0002-0986-4759]
dc.contributor.orcidAdamo, A [0000-0002-8192-8091]
dc.contributor.orcidBrown, TM [0000-0002-1793-9968]
dc.contributor.orcidChandar, R [0000-0003-0085-4623]
dc.contributor.orcidChristian, C [0000-0002-2179-3308]
dc.contributor.orcidDe Mink, SE [0000-0001-9336-2825]
dc.contributor.orcidHerrero, A [0000-0001-8768-2179]
dc.contributor.orcidJohnson, KE [0000-0001-8348-2671]
dc.contributor.orcidKennicutt, Robert [0000-0001-5448-1821]
dc.contributor.orcidKrumholz, MR [0000-0003-3893-854X]
dc.contributor.orcidPellerin, A [0000-0003-1887-1966]
dc.contributor.orcidSchaerer, D [0000-0001-7144-7182]
dc.contributor.orcidShabani, F [0000-0002-5266-1260]
dc.contributor.orcidVan Dyk, SD [0000-0001-9038-9950]
dc.identifier.eissn1538-4357
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idSCIENCE & TECHNOLOGY FACILITIES COUNCIL (ST/N000927/1)
cam.orpheus.successThu Jan 30 13:04:52 GMT 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2100-01-01


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