Paper detail

Dust Properties of Local Dust-Obscured Galaxies with the Submillimeter Array

We report Submillimeter Array (SMA) observations of the 880 μm dust continuum emission for four dust-obscured galaxies (DOGs) in the local universe. Two DOGs are clearly detected with S_ν(880 μm)=10-13 mJy and S/N>5, but the other two are not detected with 3σ upper limits of S_ν(880 μm)=5-9 mJy. Including an additional two local DOGs with submillimeter data from the literature, we determine the dust masses and temperatures for six local DOGs. The infrared luminosities and dust masses for these DOGs are in the range 1.2-4.9x10^{11} (L_sun) and 4-14x10^{7} (M_sun), respectively. The dust temperatures derived from a two-component modified blackbody function are 23-26 K and 60-124 K for the cold and warm dust components, respectively. Comparison of local DOGs with other infrared luminous galaxies with submillimeter detections shows that the dust temperatures and masses do not differ significantly among these objects. Thus, as argued previously, local DOGs are not a distinctive population among dusty galaxies, but simply represent the high-end tail of the dust obscuration distribution.