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

被引:38
作者
Aguirre, JE
Bezaire, JJ
Cheng, ES
Cottingham, DA
Cordone, SS
Crawford, TM
Fixsen, DJ
Knox, L
Meyer, SS
Norgaard-Nielsen, HU
Silverberg, RF
Timbie, P
Wilson, GW
机构
[1] Univ Chicago, Dept Phys, Chicago, IL 60637 USA
[2] Conceptual Analyt LLC, Glenn Dale, MD 20769 USA
[3] NASA, Global Sci & Technol Inc, Astron & Solar Phys Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[4] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[5] Univ Chicago, Dept Astron, Chicago, IL 60637 USA
[6] NASA, SSAI, Astron & Solar Phys Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[7] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
[8] Danish Space Res Inst, DK-2100 Copenhagen, Denmark
[9] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA
关键词
balloons; dust; extinction; galaxies : ISM; infrared : galaxies; Magellanic Clouds;
D O I
10.1086/377601
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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.
引用
收藏
页码:273 / 286
页数:14
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