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19 April 2024 |
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Temperature Profiles and the Effect of AGN on Submillimeter Emission from BLAST Observations of Resolved Galaxies | | Donald V. Wiebe
; Peter A. R. Ade
; James J. Bock
; Edward L. Chapin
; Mark J. Devlin
; Simon Dicker
; Matthew Griffin
; Joshua O. Gundersen
; Mark Halpern
; Peter C. Hargrave
; David H. Hughes
; Jeff Klein
; Gaelen Marsden
; Peter G. Martin
; Philip Mauskopf
; Calvin B. Netterfield
; Luca Olmi
; Enzo Pascale
; Guillaume Patanchon
; Marie Rex
; Douglas Scott
; Christopher Semisch
; Nicholas Thomas
; Matthew D. P. Truch
; Carole Tucker
; Gregory S. Tucker
; Marco P. Viero
; | | Date: |
24 Jul 2009 | | Abstract: | Over the course of two flights, the Balloon-borne Large Aperture
Submillimeter Telescope (BLAST) made resolved maps of seven nearby (<25 Mpc)
galaxies at 250, 350, and 500 microns. During its June 2005 flight from Sweden
(BLAST05), BLAST observed a single nearby galaxy, NGC 4565. During the December
2006 flight from Antarctica (BLAST06), BLAST observed the nearby galaxies NGC
1097, NGC 1291, NGC 1365, NGC 1512, NGC 1566, and NGC 1808. We fit physical
dust models to a combination of BLAST observations and other available data for
the the galaxies with Spitzer data. We fit a modified blackbody to the
remaining galaxies to obtain total dust mass and mean dust temperature. For the
four galaxies with Spitzer data, we also produce maps and radial profiles of
dust column density and temperature. We measure the fraction of BLAST detected
flux originating from the central cores of these galaxies and use this to
calculate a "core fraction", an upper limit on the "AGN fraction" of
submillimeter detected galaxies. Finally, we are able to use these data to
derive a value for the dust mass absorption co-efficient of kappa=0.29 +/-
0.03m^2 kg^-1 at 250 microns. | | Source: | arXiv, 0907.4154 | | Services: | Forum | Review | PDF | Favorites | |
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