The Spectrum of Integrated Millimeter Flux of the Magellanic Clouds and 30-Doradus from TopHat and DIRBE Data

We present measurements of the integrated flux relative to the local background of the Large and Small Magellanic Clouds and the region 30-Doradus (the Tarantula Nebula) in the LMC in four frequency bands centered at 245, 400, 460, and 630 GHz, based on observations made with the TopHat telescope. We combine these observations with the corresponding measurements for the DIRBE bands 8, 9, and 10 to cover the frequency range 245 3000 GHz (100−1220 μm) for these objects. We present spectra for all three objects and fit these spectra to a single-component greybody emission model and report best-fit dust temperatures, optical depths, and emissivity power-law indices, and we compare these results with other measurements in these regions and elsewhere. Using published dust grain opacities, we estimate the mass of the measured dust component in the three regions. University of Chicago, Department of Physics, 5640 South Ellis Avenue, Chicago, IL 60637 Conceptual Analytics, LLC, 8209 Woburn Abbey Road, Glenn Dale, MD 20769 Global Science and Technology, Inc., Laboratory for Astronomy and Solar Physics, NASA / Goddard Space Flight Center, Code 685, Greenbelt, MD 20771 University of Wisconsin at Madison, Department of Physics, 1150 University Avenue, Madison, WI 53706 University of Chicago, Department of Astronomy, 5640 South Ellis Avenue, Chicago, IL 60637 SSAI, Laboratory for Astronomy and Solar Physics, NASA / Goddard Space Flight Center, Code 685, Greenbelt, MD 20771 University of California, Department of Physics, One Shields Avenue, Davis, CA 95616 Danish Space Research Institute, Juliane Maries Vej 32, DK-2100 Copenhagen, Denmark NASA / Goddard Space Flight Center, Laboratory for Astronomy and Solar Physics, Code 685, Greenbelt, MD 20771 University of Massachusetts, Department of Astronomy, 619E LGRT-B, 710 North Pleasant Street, Amherst, MA 01003-9305