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Date and Time of the Query: 2019-05-20 T09:38:54 PDT
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For refcode 2007ApJ...662..284Y:
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Copyright by American Astronomical Society. Reproduced by permission
2007ApJ...662..284Y 350 micron Observations of Local Luminous Infrared Galaxies and the Temperature Dependence of the Emissivity Index M. Yang and T. Phillips Abstract. We report 350 micron observations of 18 nearby luminous infrared galaxies (LIRGs) using the Submillimeter High Angular Resolution Camera II (SHARC-II) mounted on the Caltech Submillimeter Observatory (CSO) 10.4 m telescope. Combining our 350 micron flux measurements with the existing far-infrared (FIR) and submillimeter data, we fit a single-temperature model to the spectral energy distributions (SEDs) and find the dust temperatures, emissivity indices, and FIR luminosities having sample medians of T_d_=39.4+/-7.9K, {beta}=1.6+/-0.3, and L_FIR_=10^11.2+/-0.6^L_sun_. An empirical inverse T_d_-{beta} correlation, best described by T_d_=(9.86x10^9^)^1/(4.63+{beta})^, is established for the local LIRG sample, which we argue can be explained by the intrinsic interdependence between the dust temperature and grain emissivity index as physical parameters, as well as variations in grain properties in the interstellar medium (ISM). Key words: ISM: Dust, Extinction, Infrared: Galaxies, Submillimeter
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