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Date and Time of the Query: 2018-12-15 T00:56:11 PST
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For refcode 2007ApJ...660.1198Y:
Retrieve 36 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
2007ApJ...660.1198Y 350 micron Observations of Ultraluminous Infrared Galaxies at Intermediate Redshifts M. Yang, T. R. Greve, C. D. Dowell, and C. Borys Abstract. We present 350 micron observations of 36 ultraluminous infrared galaxies (ULIRGs) at intermediate redshifts (0.089<=z<=0.926) using the Submillimeter High Angular Resolution Camera II (SHARC-II) on the Caltech Submillimeter Observatory (CSO). In total, 28 sources are detected at S/N >= 3, providing the first flux measurements longward of 100 micron for a statistically significant sample of ULIRGs in the redshift range 0.1<~z<~1.0. Combining our 350 micron flux measurements with the existing IRAS 60 and 100 micron data, we fit a single-temperature model to the spectral energy distribution (SED) and thereby estimate dust temperatures and far-IR luminosities. Assuming an emissivity index of {beta}=1.5, we find a median dust temperature and far-IR luminosity of T_d_=42.8+/-7.1 K and log (L_FIR_/L_sun_)=12.2+/-0.5, respectively. The far-IR -- radio correlation observed in local star-forming galaxies is found to hold for ULIRGs in the redshift range 0.1<~z<~0.5, suggesting that the dust in these sources is predominantly heated by starbursts. We compare the far-IR luminosities and dust temperatures derived for dusty galaxy samples at low and high redshifts with our sample of ULIRGs at intermediate redshift. A general L_FIR_-T_d_ relation is observed, albeit with significant scatter due to differing selection effects and variations in dust mass and grain properties. The relatively high dust temperatures observed for our sample compared to that of high-z submillimeter-selected starbursts with similar far-IR luminosities suggest that the dominant star formation in ULIRGs at moderate redshifts takes place on smaller spatial scales than is found at higher redshifts. Key words: Galaxies: Starburst, Infrared: Galaxies, Infrared: ISM
Retrieve 36 NED objects in this reference.
Please click here for ADS abstract

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