Summary: THE SPECTRUM OF INTEGRATED MILLIMETER FLUX OF THE MAGELLANIC CLOUDS
AND 30 DORADUS FROM TOPHAT AND DIRBE DATA
J. E. Aguirre,1 J. J. Bezaire,1 E. S. Cheng,2 D. A. Cottingham,3 S. S. Cordone,4 T. M. Crawford,5
D. J. Fixsen,6
L. Knox,7
S. S. Meyer,1,5
H. U. Norgaard-Nielsen,8
R. F. Silverberg,9
P. Timbie,4 and G. W. Wilson10
Received 2003 March 26; accepted 2003 June 18
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 245­3000 GHz (100­1220 lm) 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.

Source: Aguirre, James E. - Department of Physics and Astronomy, University of Pennsylvania
Timbie, Peter - Department of Physics, University of Wisconsin at Madison

Collections: Physics