TY - JOUR
T1 - Blast observations of resolved galaxies
T2 - Temperature profiles and the effect of active galactic nuclei on fir to Submillimeter emission
AU - Wiebe, Donald V.
AU - Ade, Peter A.R.
AU - Bock, James J.
AU - Chapin, Edward L.
AU - Devlin, Mark J.
AU - Dicker, Simon
AU - Griffin, Matthew
AU - Gundersen, Joshua O.
AU - Halpern, Mark
AU - Hargrave, Peter C.
AU - Hughes, David H.
AU - Klein, Jeff
AU - Marsden, Gaelen
AU - Martin, Peter G.
AU - Mauskopf, Philip
AU - Netterfield, Calvin B.
AU - Olmi, Luca
AU - Pascale, Enzo
AU - Patanchon, Guillaume
AU - Rex, Marie
AU - Scott, Douglas
AU - Semisch, Christopher
AU - Thomas, Nicholas
AU - Truch, Matthew D.P.
AU - Tucker, Carole
AU - Tucker, Gregory S.
AU - Viero, Marco P.
PY - 2009
Y1 - 2009
N2 - 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 500μm. During its 2005 June flight from Sweden, BLAST observed a single nearby galaxy, NGC4565. During the 2006 December flight from Antarctica, BLAST observed the nearby galaxies NGC1097, NGC1291, NGC1365, NGC1512, NGC1566, and NGC1808. We fit physical dust models to a combination of BLAST observations and other available data for the galaxies observed by Spitzer. 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 "active galactic nucleus fraction" of these galaxies. We also find our resolved observations of these galaxies give a dust mass estimate 5-19 times larger than an unresolved observation would predict. Finally, we are able to use these data to derive a value for the dust mass absorption coefficient of κ = 0.29 0.03 m2 kg-1 at 250μm. This study is an introduction to future higher-resolution and higher-sensitivity studies to be conducted by Herschel and SCUBA-2.
AB - 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 500μm. During its 2005 June flight from Sweden, BLAST observed a single nearby galaxy, NGC4565. During the 2006 December flight from Antarctica, BLAST observed the nearby galaxies NGC1097, NGC1291, NGC1365, NGC1512, NGC1566, and NGC1808. We fit physical dust models to a combination of BLAST observations and other available data for the galaxies observed by Spitzer. 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 "active galactic nucleus fraction" of these galaxies. We also find our resolved observations of these galaxies give a dust mass estimate 5-19 times larger than an unresolved observation would predict. Finally, we are able to use these data to derive a value for the dust mass absorption coefficient of κ = 0.29 0.03 m2 kg-1 at 250μm. This study is an introduction to future higher-resolution and higher-sensitivity studies to be conducted by Herschel and SCUBA-2.
KW - Alaxies: photometry
KW - Balloons
KW - Elescopes
KW - Ubmillimeter
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U2 - 10.1088/0004-637X/707/2/1809
DO - 10.1088/0004-637X/707/2/1809
M3 - Article
AN - SCOPUS:72849112033
SN - 0004-637X
VL - 707
SP - 1809
EP - 1823
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
ER -