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Date and Time of the Query: 2019-05-20 T16:07:17 PDT
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For refcode 2004A&A...414...69W:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2004A&A...414...69W The Small Magellanic Cloud in the far infrared II. Global properties K. Wilke, U. Klaas, D. Lemke, K. Mattila, M. Stickel and M. Haas Received 24 July 2003 / Accepted 7 October 2003 We present global IR properties of the Small Magellanic Cloud using an ISOPHOT 170 microns map and re-visited IRAS data. The integrated 170 microns flux is 14 950 +/- 2300 Jy, and the integrated IR flux is F_1-1000_ = 7.48 x 10^-10^ W m^-2^. Discrete sources contribute 28%, 29%, and 36% to the integrated flux at 60 microns, 100 microns, and 170 microns, respectively. Most of the total emission arises from diffuse emission regions surrounding the HII regions. The SED can be modelled by the composition of a 45 K, a 20.5 K and a 10 K blackbody component with emissivity index n = 2. A color temperature map is constructed from the ISOPHOT 170 microns and the IRAS 100 microns HiRes maps. The average dust temperature is T_D_ = 20.3 K. The total dust mass is found to be M_D_ =7.8 x 10^5^,M_sun_, yielding a gas-to-dust mass ratio M_gas_/ M_dust_ ~ 540, a value 25 times lower than found by former studies. The global star formation rate is estimated to SFR_total_ ~ 0.05,M_sun_ yr^-1^. The comparison with other irregular galaxies reveals the SMC as quiet with no peculiar FIR properties. Keywords: galaxies: Magellanic Clouds, ISM: general, ISM: dust, extinction
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