Ultra-luminous infrared galaxies: far-infrared spectral energy distributions

Details Ultra-luminous infrared galaxies: far-infrared spectral energy distributions Ultra-luminous infrared galaxies: far-infrared spectral energy distributions

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..901k&link_type=abstract

The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 901

Computer Science

5

Infrared: Galaxies, Galaxies: Photometry, Fundamental Parameters, Starburst, Agn

Scientific paper

We have obtained the most complete data set of far-infrared photometry of a sample of 37 archetypal and bright ultra-luminous galaxies. For the first time the maximum in their spectral energy distribution can be clearly seen. Assuming a grain emissivity proportional to λ-1, the spectral energy distributions can be described in first order by a superposition of two dust components with temperature ranges between 100 and 165 K and between 30 and 55 K, respectively. No very cold dust component of temperatures ~ 15 K, as found in more normal galaxies, is needed. There is no correlation between the temperatures of both components, implying that the heating mechanisms are independent.

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