J/A+A/426/119 1.2mm mapping of RCW 106 Giant Molecular Cloud (Mookerjea+, 2004)
The Giant Molecular Cloud associated with RCW 106.
A 1.2 mm continuum mapping study.
Mookerjea B., Kramer C., Nielbock M., Nyman L.-A.
<Astron. Astrophys., 426, 119-129 (2004)>
=2004A&A...426..119M 2004A&A...426..119M
ADC_Keywords: H II regions ; Molecular clouds ; X-ray sources ; Radio sources;
Infrared sources
Keywords: ISM: clouds - ISM: dust, extinction - ISM: H II regions -
ISM: structure - stars: formation - ISM: individual objects: RCW 106
Abstract:
We have mapped the dust continuum emission from the molecular cloud
covering a region of 28pcx94pc associated with the well-known H II
region RCW 106 at 1.2mm using SIMBA on SEST. The observations, having
an HPBW of 24" (0.4pc), reveal 95 clumps, of which about 50% have MSX
associations and only 20% have IRAS associations. Owing to their
higher sensitivity to colder dust and higher angular resolution the
present observations identify new emission features and also show that
most of the IRAS sources in this region consist of multiple dust
emission peaks. The detected millimeter sources (MMS) include on one
end the exotic MMS5 (associated with IRAS 16183-4958, one of the
brightest infrared sources in our Galaxy) and the bright (and
presumably cold) source MMS54, with no IRAS or MSX associations on the
other end. Around 10% of the sources are associated with signposts of
high mass star formation activity.
Description:
The 1.2mm continuum observations were carried out with the 37 channel
bolometer array SIMBA (SEST Imaging Bolometer Array) at the SEST
(Swedish-ESO Submillimeter Telescope) on La Silla, Chile during the
night from July 4 to 5, 2002.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 57 95 Observed and derived parameters of the millimeter
sources detected in the RCW 106 complex
table2.dat 70 51 Type A: clumps with Infrared associations
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [MMS]
4- 5 I2 --- MMS 1.2mm source number
8- 9 I2 h RAh Right ascension (J2000)
11- 12 I2 min RAm Right ascension (J2000)
14- 17 F4.1 s RAs Right ascension (J2000)
19 A1 --- DE- Declination sign (J2000)
20- 21 I2 deg DEd Declination (J2000)
23- 24 I2 arcmin DEm Declination (J2000)
26- 27 I2 arcsec DEs Declination (J2000)
29- 33 I5 mJy Fpeak Peak flux in mJy/beam at 1.2mm
35 I1 --- FF [1/6]? Estimated free-free contribution
to 1.2mm flux density code (1)
37- 40 F4.2 pc Rad Clump radius (convolved with the beam)
42- 46 F5.1 Jy Fnu Total integrated flux density at 1.2mm
48- 52 I5 solMass Mass Dust (clump) masses (calculated for
Tdust=20K and an emissivity β=2)
54- 57 F4.2 10+4cm-3 nH2 H2 column density
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Note (1): Estimated free-free contribution to the 1.2mm flux densities
from the H II regions are
1 = 23%, 2 = 20%, 3 = 36%, 4 = 12%, 5 = 4%, and 6 = 18%.
The masses for these sources are calculated assuming a temperature of 40K
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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- 3 A3 --- --- [MMS]
4- 5 I2 --- MMS 1.2mm source number
10- 19 A10 --- IRAS IRAS (II/125) counterpart
20 A1 --- n_IRAS [*] *: FIR detection at 150 and 210um
by karnik et al., 2001MNRAS.326..293K 2001MNRAS.326..293K
22- 37 A16 --- MSX5C MSX5C (See Cat. V/114) counterpart
40- 50 A11 --- HII Associated HII region
54 A1 ---- UCHII [Y/N] Ultra-compact HII region ?
58- 72 A15 --- Masers Associated Masers
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 09-Sep-2005