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Abstract
Dust has long been identified as a barrier to measuring inherent galaxy properties. However, the link between dust and attenuation is not straightforward and depends on both the amount of dust and its distribution. Herschel imaging of nearby galaxies undertaken as part of the KINGFISH project allows us to map the dust as seen in emission with unprecedented sensitivity and similar to 1 kpc resolution. We present here new optical integral field unit spectroscopy for eight of these galaxies that provides complementary 100-200 pc scale maps of the dust attenuation through observation of the reddening in both the Balmer decrement and the stellar continuum. The stellar continuum reddening, which is systematically less than that observed in the Balmer decrement, shows no clear correlation with the dust, suggesting that the distribution of stellar reddening acts as a poor tracer of the overall dust content. The brightest H II regions are observed to be preferentially located in dusty regions, and we do find a correlation between the Balmer line reddening and the dust mass surface density for which we provide an empirical relation. Some of the high-inclination systems in our sample exhibit high extinction, but we also find evidence that unresolved variations in the dust distribution on scales smaller than 500 pc may contribute to the scatter in this relation. We caution against the use of integrated A(V) measures to infer global dust properties.
Keywords
DIFFUSE IONIZED-GAS, DIGITAL SKY SURVEY, POTSDAM MULTIAPERTURE, SPECTROPHOTOMETER, SPITZER-SPACE-TELESCOPE, STAR-FORMING GALAXIES, H-II, REGIONS, SPIRAL GALAXIES, STARBURST GALAXIES, ULTRAVIOLET EXTINCTION, OPTICAL SPECTROSCOPY, dust, extinction, galaxies: ISM

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MLA
Kreckel, Kathryn, et al. “Mapping Dust through Emission and Absorption in Nearby Galaxies.” ASTROPHYSICAL JOURNAL, vol. 771, no. 1, 2013.
APA
Kreckel, K., Groves, B., Schinnerer, E., Johnson, B. D., Aniano, G., Calzetti, D., … Tabatabaei, F. S. (2013). Mapping dust through emission and absorption in nearby galaxies. ASTROPHYSICAL JOURNAL, 771(1).
Chicago author-date
Kreckel, Kathryn, Brent Groves, Eva Schinnerer, Benjamin D Johnson, Gonzalo Aniano, Daniela Calzetti, Kevin V Croxall, et al. 2013. “Mapping Dust through Emission and Absorption in Nearby Galaxies.” ASTROPHYSICAL JOURNAL 771 (1).
Chicago author-date (all authors)
Kreckel, Kathryn, Brent Groves, Eva Schinnerer, Benjamin D Johnson, Gonzalo Aniano, Daniela Calzetti, Kevin V Croxall, Bruce T Draine, Karl D Gordon, Alison F Crocker, Daniel A Dale, Leslie K Hunt, Robert C Kennicutt, Sharon Meidt van der Wel, JDT Smith, and Fatemeh S Tabatabaei. 2013. “Mapping Dust through Emission and Absorption in Nearby Galaxies.” ASTROPHYSICAL JOURNAL 771 (1).
Vancouver
1.
Kreckel K, Groves B, Schinnerer E, Johnson BD, Aniano G, Calzetti D, et al. Mapping dust through emission and absorption in nearby galaxies. ASTROPHYSICAL JOURNAL. 2013;771(1).
IEEE
[1]
K. Kreckel et al., “Mapping dust through emission and absorption in nearby galaxies,” ASTROPHYSICAL JOURNAL, vol. 771, no. 1, 2013.
@article{8622841,
  abstract     = {Dust has long been identified as a barrier to measuring inherent galaxy properties. However, the link between dust and attenuation is not straightforward and depends on both the amount of dust and its distribution. Herschel imaging of nearby galaxies undertaken as part of the KINGFISH project allows us to map the dust as seen in emission with unprecedented sensitivity and similar to 1 kpc resolution. We present here new optical integral field unit spectroscopy for eight of these galaxies that provides complementary 100-200 pc scale maps of the dust attenuation through observation of the reddening in both the Balmer decrement and the stellar continuum. The stellar continuum reddening, which is systematically less than that observed in the Balmer decrement, shows no clear correlation with the dust, suggesting that the distribution of stellar reddening acts as a poor tracer of the overall dust content. The brightest H II regions are observed to be preferentially located in dusty regions, and we do find a correlation between the Balmer line reddening and the dust mass surface density for which we provide an empirical relation. Some of the high-inclination systems in our sample exhibit high extinction, but we also find evidence that unresolved variations in the dust distribution on scales smaller than 500 pc may contribute to the scatter in this relation. We caution against the use of integrated A(V) measures to infer global dust properties.},
  articleno    = {62},
  author       = {Kreckel, Kathryn and Groves, Brent and Schinnerer, Eva and Johnson, Benjamin D and Aniano, Gonzalo and Calzetti, Daniela and Croxall, Kevin V and Draine, Bruce T and Gordon, Karl D and Crocker, Alison F and Dale, Daniel A and Hunt, Leslie K and Kennicutt, Robert C and van der Wel, Sharon Meidt and Smith, JDT and Tabatabaei, Fatemeh S},
  issn         = {0004-637X},
  journal      = {ASTROPHYSICAL JOURNAL},
  keywords     = {DIFFUSE IONIZED-GAS,DIGITAL SKY SURVEY,POTSDAM MULTIAPERTURE,SPECTROPHOTOMETER,SPITZER-SPACE-TELESCOPE,STAR-FORMING GALAXIES,H-II,REGIONS,SPIRAL GALAXIES,STARBURST GALAXIES,ULTRAVIOLET EXTINCTION,OPTICAL SPECTROSCOPY,dust,extinction,galaxies: ISM},
  language     = {eng},
  number       = {1},
  pages        = {16},
  title        = {Mapping dust through emission and absorption in nearby galaxies},
  url          = {http://dx.doi.org/10.1088/0004-637X/771/1/62},
  volume       = {771},
  year         = {2013},
}

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