Journal
ASTROPHYSICAL JOURNAL
Volume 761, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/761/1/42
Keywords
dust, extinction; galaxies: evolution; galaxies: general; galaxies: ISM; infrared: galaxies; Magellanic Clouds
Categories
Funding
- NASA Herschel Science Center [1350371, 1381522, 1381650]
- NSF [AST-1109039]
- CONICYT through FONDECT [1080335]
- European Space Agency (ESA)
- PACS team
- SPIRE team
- Herschel Science Center
- NASA Herschel Science Center
- PACS instrument control center
- SPIRE instrument control center
- STFC [PP/F000057/1, PP/D000955/1, ST/J001538/1, ST/J001384/1, ST/G002355/1, ST/J000035/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H00243X/1, ST/J001384/1, PP/F000057/1, ST/G002355/1, ST/J000035/1, ST/J001538/1, PP/D000955/1] Funding Source: researchfish
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We study the emission by dust and stars in the Large and Small Magellanic Clouds, a pair of low-metallicity nearby galaxies, as traced by their spatially resolved spectral energy distributions. This project combines Herschel Space Observatory PACS and SPIRE far-infrared photometry with other data at infrared and optical wavelengths (the data were obtained as part of the HERschel Inventory of The Agents of Galaxy Evolution survey; PI: M. Meixner). We build maps of dust, stellar luminosity, and mass of both Magellanic Clouds, and analyze the spatial distribution of dust/stellar luminosity and mass ratios. These ratios vary considerably throughout the galaxies, generally between the range 0.01 <= L-dust/L-* <= 0.6 and 10(-4) <= M-dust/M-* <= 4x10(-3). We observe that the dust/stellar ratios depend on the interstellar medium environment, such as the distance from currently or previously star-forming regions, and on the intensity of the interstellar radiation field. In addition, we construct star formation rate (SFR) maps, and find that the SFR is correlated with the dust/stellar luminosity and dust temperature in both galaxies, demonstrating the relation between star formation, dust emission, and heating, though these correlations exhibit substantial scatter.
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