J/ApJ/710/1247 Dense cores in Gould Belt clouds (Sadavoy+, 2010)
The mass distribution of starless and protostellar cores in Gould Belt clouds.
Sadavoy S.I., Di Francesco J., Bontemps S., Megeath S.T., Rebull L.M.,
Allgaier E., Carey S., Gutermuth R., Hora J., Huard T., McCabe C.-E.,
Muzerolle J., Noriega-Crespo A., Padgett D., Terebey S.
<Astrophys. J., 710, 1247-1270 (2010)>
=2010ApJ...710.1247S 2010ApJ...710.1247S
ADC_Keywords: Molecular clouds ; YSOs ; Millimetric/submm sources
Keywords: dust, extinction - ISM: clouds - stars: formation -
stars: luminosity function, mass function - stars: protostars
Abstract:
Using data from the SCUBA Legacy Catalogue (850um) and Spitzer Space
Telescope (3.6-70um), we explore dense cores in the Ophiuchus, Taurus,
Perseus, Serpens, and Orion molecular clouds. We develop a new method
to discriminate submillimeter cores found by Submillimeter Common-User
Bolometer Array (SCUBA) as starless or protostellar, using point
source photometry from Spitzer wide field surveys. First, we identify
infrared sources with red colors associated with embedded young
stellar objects (YSOs). Second, we compare the positions of these YSO
candidates to our submillimeter cores. With these identifications, we
construct new, self-consistent starless and protostellar core mass
functions (CMFs) for the five clouds. We find best-fit slopes to the
high-mass end of the CMFs of -1.26±0.20, -1.22±0.06, -0.95±0.20,
and -1.67±0.72 for Ophiuchus, Taurus, Perseus, and Orion,
respectively.
Description:
We obtained our submillimeter data from the SCUBA Legacy Catalogue
(SLC; see Di Francesco et al. 2008, Cat. J/ApJS/175/277), which is an
archive of all 850um and 450um mapping observations from SCUBA on the
James Clerk Maxwell Telescope (JCMT).
We used the "Molecular Cores to Planet Forming Disks" (c2d; Evans et
al. 2003PASP..115..965E 2003PASP..115..965E, 2009, Cat. J/ApJS/181/321) Legacy Project
data for the Ophiuchus, Perseus, and Serpens molecular clouds. The
Taurus data came from Guest Observer (GO) observations for the Taurus
Legacy Project (D. L. Padgett et al. 2010, in preparation), and the
Orion data are from Guaranteed Time Observations (GTO) for the Spitzer
Orion Survey (S. T. Megeath et al. 2010, in preparation).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table10.dat 71 559 List of starless cores
table11.dat 71 185 List of protostellar cores
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See also:
J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)
J/ApJ/692/973 : Protostars in Perseus, Serpens and Ophiuchus (Enoch+, 2009)
J/ApJS/175/277 : Submillimeter-Continuum SCUBA detections (Di Francesco+, 2008)
J/ApJ/677/401 : Xray properties of protostars in ONC (Prisinzano+, 2008)
J/ApJ/663/1149 : Spitzer survey of Serpens YSO population (Harvey+, 2007)
J/A+A/447/609 : 1.2mm continuum observations in rho Oph cloud (Stanke+, 2006)
http://irsa.ipac.caltech.edu/data/SPITZER/C2D/ : C2D Spitzer data
http://irsa.ipac.caltech.edu/data/SPITZER/Taurus/ : Taurus Spitzer data
Byte-by-byte Description of file: table1[01].dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Cloud Cloud
11- 17 A7 --- --- [JCMTSF_]
18- 33 A16 --- JCMTSF Core name (JHHMMSS.s+DDMMSS)
35- 39 F5.2 mag AV V band extinction (1)
41- 46 F6.2 Jy SPeak SCUBA 850 micron peak flux at the source
position in Jy/beam
48- 53 F6.2 Jy S850 SCUBA total 850 micron flux (2)
55- 62 F8.3 Msun Mass Mass (3)
64- 71 E8.2 pc Reff Effective radius (4)
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Note (1): Extinction measured towards the location of peak SCUBA 850 micron
flux.
Note (2): Within the core, where the core was defined by Clumpfind with a
threshold of 90mJy/beam.
Note (3): Derived from total 850 micron SCUBA flux using Equation 3.
Note (4): Of the core determined by the Clumpfind area, A, where
Reff=sqrt(A/π) for a Clumpfind threshold of 90mJy/beam.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 16-Mar-2012