THE SPATIAL DISTRIBUTION OF DUST AND STELLAR EMISSION OF THE MAGELLANIC CLOUDS

被引：34

作者：

Skibba, Ramin A. ^{[1
,2
]}

Engelbracht, Charles W. ^{[1
,3
]}

Aniano, Gonzalo ^{[4
]}

Babler, Brian ^{[5
]}

Bernard, Jean-Philippe ^{[6
,7
]}

Bot, Caroline ^{[8
,9
]}

Carlson, Lynn Redding ^{[10
]}

Galametz, Maud ^{[11
]}

Galliano, Frederic ^{[12
]}

Gordon, Karl ^{[13
]}

Hony, Sacha ^{[12
]}

Israel, Frank ^{[10
]}

Lebouteiller, Vianney ^{[12
]}

Li, Aigen ^{[14
]}

Madden, Suzanne ^{[12
]}

Meixner, Margaret ^{[13
]}

Misselt, Karl ^{[1
]}

Montiel, Edward ^{[1
]}

Okumura, Koryo ^{[12
]}

Panuzzo, Pasquale ^{[12
]}

Paradis, Deborah ^{[6
,7
]}

Roman-Duval, Julia ^{[13
]}

Rubio, Monica ^{[15
]}

Sauvage, Marc ^{[12
]}

Seale, Jonathan ^{[13
]}

Srinivasan, Sundar ^{[16
]}

van Loon, Jacco Th. ^{[17
]}

机构：

[1] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

[2] Univ Calif San Diego, Ctr Astrophys & Space Sci, Dept Phys, San Diego, CA 92093 USA

[3] Raytheon Co, Tucson, AZ 85756 USA

[4] Princeton Univ Observ, Princeton, NJ 08544 USA

[5] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

[6] Univ Toulouse, UPS OMP, IRAP, Toulouse, France

[7] CNRS, IRAP, F-31028 Toulouse 4, France

[8] Univ Strasbourg, Observ Astron Strasbourg, F-67000 Strasbourg, France

[9] Observ Astron, CNRS, UMR7550, F-67000 Strasbourg, France

[10] Leiden Univ, Sterrewacht Leiden, NL-2300 RA Leiden, Netherlands

[11] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[12] CEA Saclay, AIM, F-91191 Gif Sur Yvette, France

[13] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[14] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[15] Univ Chile, Dept Astron, Santiago, Chile

[16] Inst Astrophys, UPMC CNRS UMR7095, F-75014 Paris, France

[17] Univ Keele, Lennard Jones Labs, Keele ST5 5BG, Staffs, England

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 761卷 / 01期

关键词：

dust; extinction; galaxies: evolution; galaxies: general; galaxies: ISM; infrared: galaxies; Magellanic Clouds; SPECTRAL ENERGY-DISTRIBUTION; STAR-FORMATION HISTORY; FORMATION RATE INDICATORS; GALAXY EVOLUTION SAGE; FAR-INFRARED EMISSION; H-II REGIONS; INTERSTELLAR-MEDIUM; LOW-METALLICITY; MILKY-WAY; NEARBY GALAXIES;

D O I：

10.1088/0004-637X/761/1/42

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：14

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