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J/ApJ/707/1824 Cold cores in Vela (Netterfield+, 2009)
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Beginning of ReadMe :J/ApJ/707/1824 BLAST Vela sources (Netterfield+, 2009)
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BLAST: the mass function, lifetimes, and properties of intermediate mass cores
from a 50 deg^2^ submillimeter galactic survey in Vela (l 265deg).
Netterfield C.B., Ade P.A.R., Bock J.J., Chapin E.L., Devlin M.J.,
Griffin M., Gundersen J.O., Halpern M., Hargrave P.C., Hughes D.H.,
Klein J., Marsden G., Martin P.G., Mauskopf P., Olmi L., Pascale E.,
Patanchon G., Rex M., Roy A., Scott D., Semisch C., Thomas N.,
Truch M.D.P., Tucker C., Tucker G.S., Viero M.P., Wiebe D.V.
<Astrophys. J., 707, 1824-1835 (2009)>
=2009ApJ...707.1824N
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ADC_Keywords: Photometry, millimetric/submm ; Surveys ; Galactic plane ;
Interstellar medium
Keywords: ISM: clouds - stars: formation - submillimeter
Abstract:
We present first results from an unbiased 50deg^2^ submillimeter
Galactic survey at 250, 350, and 500um from the 2006 flight of the
Balloon-borne Large Aperture Submillimeter Telescope. The map has
resolution ranging from 36" to 60" in the three submillimeter bands
spanning the thermal emission peak of cold starless cores. We
determine the temperature, luminosity, and mass of more than 1000
compact sources in a range of evolutionary stages and an unbiased
statistical characterization of the population. From comparison with
C^18^O data, we find the dust opacity per gas mass,
kappar=0.16cm^2^/g at 250um, for cold clumps. We find that 2% of the
mass of the molecular gas over this diverse region is in cores colder
than 14K, and that the mass function for these cold cores is
consistent with a power law with index alpha=-3.22+/-0.14 over the
mass range 14M_sun_<M<80M_sun_.
Description:
BLAST is described in detail in Pascale et al. (2008ApJ...681..400P).
The data presented here are from the 2006 flight: a 12 day flight from
McMurdo Station, Antarctica in 2006 December (BLAST06). BLAST06 is a
1.8m Cassegrain telescope, whose underilluminated primary mirror
produces beams with full width at half-maximum (FWHM) sizes of 36",
42", and 60" at 250, 350, and 500um, respectively. The 50deg^2^
submillimeter map of a portion of the Galactic plane made with BLAST
spans 10deg in Galactic longitude and 5deg in Galactic latitude
in the constellation Vela, including the Vela Molecular Ridge (VMR).