J/ApJ/707/1824 BLAST Vela sources (Netterfield+, 2009)
BLAST: the mass function, lifetimes, and properties of intermediate mass cores
from a 50 deg2 submillimeter galactic survey in Vela (l∼265°).
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 2009ApJ...707.1824N
ADC_Keywords: Photometry, millimetric/submm ; Surveys ; Galactic plane ;
Interstellar medium
Keywords: ISM: clouds - stars: formation - submillimeter
Abstract:
We present first results from an unbiased 50deg2 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
C18O data, we find the dust opacity per gas mass,
κr=0.16cm2/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 α=-3.22±0.14 over the
mass range 14M☉<M<80M☉.
Description:
BLAST is described in detail in Pascale et al. (2008ApJ...681..400P 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 50deg2
submillimeter map of a portion of the Galactic plane made with BLAST
spans ∼10° in Galactic longitude and ∼5° in Galactic latitude
in the constellation Vela, including the Vela Molecular Ridge (VMR).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 1282 BLAST Vela sources measured properties
table2.dat 97 1282 BLAST Vela sources derived properties
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See also:
J/MNRAS/411/505 : Sub-mm observations in ECDFS (Chapin+, 2011)
J/ApJS/191/222 : BLAST observations of the SEP field (Valiante+, 2010)
J/other/Nat/458.737 : BLAST sources at 250, 350 and 500um (Devlin+, 2009)
J/ApJ/707/1779 : BLAST: the redshift survey (Eales+, 2009)
J/ApJ/703/285 : Radio and IR counterparts of BLAST sources in CDFS (Dye+,
2009)
J/ApJ/681/428 : BLAST sources in Galactic plane survey (Chapin+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [BLAST]
7- 20 A14 --- BLAST Source name (JHHMMSS+DDMMSS)
22- 29 F8.4 deg GLON Galactic longitude
31- 37 F7.4 deg GLAT Galactic latitude
39- 44 F6.1 Jy F250 BLAST flux density at 250um
46- 50 F5.1 Jy e_F250 Uncertainty in F250
52- 57 F6.1 Jy F350 BLAST flux density at 350um
59- 63 F5.1 Jy e_F350 Uncertainty in F350
65- 69 F5.1 Jy F500 BLAST flux density at 500um
71- 75 F5.1 Jy e_F500 Uncertainty in F500
77- 80 F4.1 arcsec FWHM Full-Width at Half-Maximum at 250um
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [BLAST]
7- 20 A14 --- BLAST Source name (JHHMMSS+DDMMSS)
22- 25 F4.1 K T Derived temperature
27- 30 F4.1 K E_T Upper limit uncertainty on T
32- 35 F4.1 K e_T Lower limit uncertainty on T
37- 41 F5.1 Msun M Derived mass
43- 52 F10.1 Msun E_M ? Upper limit uncertainty on M
54- 62 F9.1 Msun e_M ? Lower limit uncertainty on M
64- 70 F7.1 Lsun L ? Derived luminosity
72- 79 F8.1 Lsun E_L ? Upper limit uncertainty on L
81- 87 F7.1 Lsun e_L ? Lower limit uncertainty on L
89- 92 F4.2 pc Size Derived source size
94- 97 F4.2 pc e_Size ? Uncertainty in Size
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Jan-2012