J/ApJ/653/383 SCUBA observations in Orion A South region (Johnstone+, 2006)
Large-area mapping at 850µm.
V. Analysis of the clump distribution in the Orion A South molecular cloud.
Johnstone D., Bally J.
<Astrophys. J., 653, 383-397 (2006)>
=2006ApJ...653..383J 2006ApJ...653..383J
ADC_Keywords: Molecular clouds ; Millimetric/submm sources
Keywords: infrared: ISM: continuum -
ISM: individual (HH 1/2, HH 34, L1641N, OMC 4, OMC 5, Orion A South) -
ISM: structure - stars: formation
Abstract:
We present results from a 2300arcmin2 survey of the Orion A molecular
cloud at 450 and 850um using the Submillimeter Common-User Bolometer
Array (SCUBA) on the James Clerk Maxwell Telescope. The region mapped
lies directly south of the OMC 1 cloud core and includes OMC 4, OMC 5,
HH 1/2, HH 34, and L1641N. We identify 71 independent clumps in the
850um map and compute size, flux, and degree of central concentration
in each.
Description:
The data covering the Orion A South region were obtained between 1997
and 2002 using SCUBA at the James Clerk Maxwell Telescope (JCMT).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 74 71 Clump properties in Orion A south derived
from 850um data
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See also:
J/ApJ/559/307 : Sub-mm mapping in Ori B molecular cloud (Johnstone+, 2001)
J/ApJ/639/259 : Sub-mm clumps in Ori B South molecular cloud (Johnstone+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 -- SMMJ Name formed with J2000.0 positions
(HHMMmm+DDMMm),
[JB2006] SMM JHHMMmm+DDMMm in Simbad
14- 15 I2 --- [JB2006] Sequential number
17- 18 I2 h RAh Right ascension (J2000.0) (1)
20- 21 I2 min RAm Right ascension (J2000.0) (1)
23- 26 F4.1 s RAs Right ascension (J2000.0) (1)
28 A1 --- DE- Declination sign (J2000.0) (1)
29- 30 I2 deg DEd Declination (J2000.0) (1)
32- 33 I2 arcmin DEm Declination (J2000.0) (1)
35- 36 I2 arcsec DEs Declination (J2000.0) (1)
38- 42 F5.2 Jy S850 Total flux at 850um (2)
44- 47 F4.2 Jy Sp850 Peak flux at 850um (Jy/beam) (2)
49- 50 I2 10+3AU Reff Effective radius (2)
52- 55 F4.2 --- C Concentration parameter (3)
57- 58 I2 K Td Dust temperature (3)
60- 62 F3.1 [K/cm3] log(P/k) External pressure (3)
64- 68 F5.2 solMass M Mass at dust temperature (3)
70- 74 F5.2 solMass M20K Mass at dust temperature Td=20K (4)
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Note (1): Position of peak surface brightness within clump (accurate to 3").
Note (2): Radius, peak flux, and total flux are derived from CLFIND
(Williams et al., 1994, Cat. J/ApJ/428/693). The peak flux and total
flux have uncertainties of about 20%, mostly due to absolute flux
calibration. The radius has not been deconvolved from the telescope beam.
Note (3): Quantities derived from Bonnor-Ebert analysis (see text).
Note (4): Mass derived from the total flux assuming Td=20K and
k850=0.02cm2/g.
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History:
From electronic version of the journal
References:
Johnstone et al., Paper I 2000ApJS..131..505J 2000ApJS..131..505J
Johnstone et al., Paper II 2000ApJ...545..327J 2000ApJ...545..327J
Johnstone et al., Paper III 2001ApJ...559..307J 2001ApJ...559..307J, Cat. J/ApJ/559/307
Johnstone et al., Paper IV 2006ApJ...639..259J 2006ApJ...639..259J, Cat. J/ApJ/639/259
(End) Patricia Vannier [CDS] 31-Jul-2008