The spectrum of integrated millimeter flux of the Magellanic Clouds and 30 Doradus from Tophat and Dirbe data

J.E. Aguirre, J.J. Bezaire, E.S. Cheng, D.A. Cottingham, S.S. Cordone, T.M. Crawford, D.J. Fixsen, L. Knox, S.S. Meyer, Hans Ulrik Nørgaard-Nielsen, R.F. Silverberg, P. Timbie, G.W. Wilson

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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 mum) for these objects. We present spectra for all three objects and fit these spectra to a single-component graybody 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.
Original languageEnglish
JournalAstrophysical Journal
Volume596
Issue number1
Pages (from-to)273-286
ISSN0004-637X
Publication statusPublished - 2003

Keywords

  • Magellanic Clouds
  • galaxies : ISM
  • dust, extinction
  • infrared : galaxies
  • balloons

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