J/ApJ/566/945 Massive star forming regions at 1.2mm (Beuther+, 2002)
High-mass protostellar candidates.
II. Density structure from dust continuum and CS emission.
Beuther H., Schilke P., Menten K.M., Motte F., Sridharan T.K., Wyrowski F.
<Astrophys. J., 566, 945-965 (2002)>
=2002ApJ...566..945B 2002ApJ...566..945B
ADC_Keywords: Molecular clouds ; Radio lines ; Morphology
Keywords: ISM: clouds - ISM: molecules - radio continuum: ISM -
radio lines: ISM - stars: formation
Abstract:
We present a detailed 1.2mm continuum and CS spectral line study of a
large sample of 69 massive star forming regions in very early stages
of evolution, most of them prior to building up an ultracompact H II
region.
Description:
The MPIfR 37-element bolometer array MAMBO at the IRAM 30m telescope
was used to image the 1.2mm dust continuum emission of the whole
sample. This survey was performed in three sessions between 1998
February and 2000 February.
We remotely observed the J=2-1, 3-2, and 5-4 lines of CS and C34S on
three nights between October 31 and 2000 November 3 with the IRAM 30m
telescope in a large fraction of sources from our sample from the
MPIfR in Bonn, Germany.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 73 69 The sample (from Sridharan et al.,
2002ApJ...566..931S 2002ApJ...566..931S)
table2.dat 72 154 Fits to the 1.2mm observations
table4.dat 99 93 Parameters of the CS-fits
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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- 10 A10 --- Name Source identification (IRAS name)
12- 13 I2 h RAh Right Ascension (J2000)
15- 16 I2 min RAm Right Ascension (J2000)
18- 21 F4.1 s RAs Right Ascension (J2000)
23 A1 --- DE- Sign of the Declination (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 31 I2 arcsec DEs Declination (J2000)
33- 37 F5.1 km/s Vlsr Local standard of rest velocity
39- 42 F4.1 kpc farD The far kinematic distance
44- 45 I2 --- r_farD ? Reference for distance (1)
47- 49 F3.1 kpc nearD ? The near kinematic distance (2)
51- 52 I2 K Tcd The cold dust component temperature
54- 56 I3 K Thd The hot dust component temperature
58- 60 F3.1 [solLum] farL Log of the luminosity with far hypothesis
62- 64 F3.1 [solLum] nearL ? Log of the luminosity with near hypothesis
66- 68 I3 arcsec Sep ? Offset between the 12 and 100 micron IRAS
source positions
70- 71 I2 K Trot ? The NH3 rotation temperature (3)
73 I1 --- MSX ? Number of MSX point source catalog
detections within 2' from the IRAS position
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Note (1): Reference as follows:
1 = Snell et al., 1990ApJ...352..139S 1990ApJ...352..139S
2 = Wilking et al., 1989ApJ...345..257W 1989ApJ...345..257W
3 = Blaauw, 1964ARA&A...2..213B 1964ARA&A...2..213B
4 = Jijina et al., 1999, Cat. J/ApJS/125/161
5 = Garay et al., 1993ApJ...418..368G 1993ApJ...418..368G
6 = Walsh et al., 1997. Cat. J/MNRAS/291/26
7 = Kuchar & Bania, 1994ApJ...436..117K 1994ApJ...436..117K
8 = Osterloh, Henning & Launhardt, 1997ApJS..110...71O 1997ApJS..110...71O
9 = near star HD231160
10 = near star CGO 544
Note (2): Only far and no near distance means that the distance ambiguity
is solved.
Note (3): Correct to approximately 3K.
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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- 10 A10 --- Name Source name
12 I1 --- Seq Identified core number in Figure 1
14- 17 I4 mJy Sp Derived peak flux at 1.2mm,
in units of mJy/(11arcsec")2
19- 20 I2 mJy e_Sp Uncertainty in Sp
22- 24 F3.1 Jy Sint Integrated flux at 1.2mm
26- 31 F6.1 arcsec Xoff The X positional offset
33- 35 F3.1 arcsec e_Xoff Uncertainty in Xoff
37- 42 F6.1 arcsec Yoff The Y positional offset
44- 46 F3.1 arcsec e_Yoff Uncertainty in Yoff
48- 52 F5.1 arcsec MajAxis Major axis of the 2D Gaussian fit
54- 57 F4.1 arcsec e_MajAxis Uncertainty in MajAxis
59- 62 F4.1 arcsec MinAxis Minor axis of the 2D Gaussian fit
64- 66 F3.1 arcsec e_MinAxis Uncertainty in MinAxis
68- 70 I3 deg PosAng Positional angle of 2D Gaussian fit
72 I1 --- Type Sub-group type (1)
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Note (1): Sub-group type as follows:
0 = no grouping
1 = CH3OH and/or CH3CN detections and no resolved cm-source
2 = resolved cm-emission
3 = no CH3OH and CH3CN emission and no resolved
cm-source (Sridharan et al., 2002ApJ...566..931S 2002ApJ...566..931S)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Source name
12 I1 --- Peak The peak number
14- 18 F5.1 km/s VLSR The Local Standard of Rest velocity (1)
20- 22 F3.1 K T(CS21) Peak temperature of CS 2-1
24- 27 F4.1 K.km/s I(CS21) Integrated intensity of CS 2-1
29- 31 F3.1 km/s W(CS21) Line width of CS 2-1
33- 36 F4.1 K T(CS32) ? Peak temperature of CS 3-2
38- 41 F4.1 K.km/s I(CS32) ? Integrated intensity of CS 3-2
43- 45 F3.1 km/s W(CS32) ? Line width of CS 3-2
47- 50 F4.1 K T(CS54) ? Peak temperature of CS 5-4
52- 55 F4.1 K.km/s I(CS54) ? Integrated intensity of CS 5-4
57- 60 F4.1 km/s W(CS54) ? Line width of CS 5-4
62- 64 F3.1 K T(34.21) ? Peak temperature of C34S 2-1
66- 69 F4.1 K.km/s I(34.21) ? Integrated intensity of C34S 2-1
71- 73 F3.1 km/s W(34.21) ? Line width of C34S 2-1
75- 77 F3.1 K T(34.32) ? Peak temperature of C34S 3-2
79- 82 F4.1 K.km/s I(34.32) ? Integrated intensity of C34S 3-2
84- 86 F3.1 km/s W(34.32) ? Line width of C34S 3-2
88- 90 F3.1 K T(34.54) ? Peak temperature of C34S 5-4
92- 95 F4.1 K.km/s I(34.54) ? Integrated intensity of C34S 5-4
97- 99 F3.1 km/s W(34.54) ? Line width of C34S 5-4
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Note (1): Taken from the CS 2-1 fit.
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History:
From electronic version of the journal
References:
Sridharan et al., Paper I 2002ApJ...566..931S 2002ApJ...566..931S
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 07-Sep-2009