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J/MNRAS/391/869     A mapping survey of massive CO cores     (Guan+, 2008)

A mapping survey of massive CO cores. Guan X., Wu Y., Ju B. <Mon. Not. R. Astron. Soc., 391, 869-880 (2008)> =2008MNRAS.391..869G
ADC_Keywords: Molecular clouds ; Interstellar medium ; Carbon monoxide Keywords: stars: formation - ISM: clouds - ISM: molecules Abstract: We mapped 21 star-forming regions with the 12CO, 13CO and C18O (1-0) lines using the 13.7-m telescope of Purple Mount Observatory. This mapping survey resolved 53 13CO cores, of which 22 are sourceless. We obtained the physical parameters of these cores. The relation between 13CO linewidth and core size and that between column density and core size were analysed. The cores 00211+6549-1 and 22566+5830 were found to have outflows. Systematic VLSR shifts were detected in nine regions: 00211+6549, 00232+6437, 05168+3634, 19199+1358, 20160+3911, 22566+5830, 23042+6000, S146 and S270. Signatures of infall and cloud collision were found in regions 18507+0121 and 19199+1358, respectively. We studied the mass function of these 13CO cores. The core masses range from 3.40 to 4.64x104M, and the core mass function is a power-law distribution of index -0.82±0.04. Description: Observations of the 12CO, 13CO and C18O (1-0) lines were made in mid-to-late January, late February and early March in 2006 with the 13.7-m telescope of the Purple Mount Observatory (PMO). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 71 53 Observed parameters table2.dat 48 28 Excluded regions
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 12 A12 --- [GWJ2008] Core name (HHMMm+DDMM-N, S146, or S270-N) 14- 15 I2 h RAh Right ascension (J2000) 17- 18 I2 min RAm Right ascension (J2000) 20- 24 F5.2 s RAs Right ascension (J2000) 25 A1 --- DE- Declination sign (J2000) 26- 27 I2 deg DEd Declination (J2000) 29- 30 I2 arcmin DEm Declination (J2000) 32- 33 I2 arcsec DEs Declination (J2000) 35- 39 F5.2 K TR(12) 12CO radiation temperature 41- 45 F5.2 K TR(13) 13CO radiation temperature 47- 52 F6.2 km/s V(13) 13CO LSR velocity 54- 57 F4.2 km/s DV(13) 13CO FWHM 59- 62 F4.2 kpc Dist ?=- Distance 63 A1 --- r_Dist Distance references (1) 66- 68 F3.1 arcmin d Angular diameter of a circle whose area equals to that of the cloud core 71 A1 --- Flag [YIiN] Sourceless flag (2)
Note (1): References as follows: a = Ishii et al. (2002AJ....124..430I) b = kinematic distance from the Galaxy's rotation curve (Brand & Blitz 1993, Cat. J/A+A/275/67) c = Wu et al. (2006A&A...450..607W) d = Aspin & Reipurth (2000MNRAS.311..522A) e = Zhang et al. (2005ApJ...625..864Z) f = Manoj, Maheswar & Bhatt (2002MNRAS.334..419M) g = Tej et al. (2006A&A...452..203T) h = Wouterloot & Brand (1989, Cat J/A+AS/80/149) i = Wu et al. (2005AJ....129..330W) j = Kuchar & Bania (1994ApJ...436..117K) Note (2): Flag as follows: Y = the core is sourceless by MSX catalogue. i = the core is sourceless by the IRAS Point Source Catalog. N = there is at least one MSX source within on beam size from the core centre. I = no MSX imaging data are available in the mapped region, but there is at least one IRAS source within on beam size from the core centre.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Source name (HHMM-DDMM or SNNN) 12- 13 I2 h RAh Right ascension (J2000) 15- 16 I2 min RAm Right ascension (J2000) 18- 22 F5.2 s RAs Right ascension (J2000) 24 A1 --- DE- Declination sign (J2000) 25- 26 I2 deg DEd Declination (J2000) 28- 29 I2 arcmin DEm Declination (J2000) 31- 34 F4.1 arcsec DEs Declination (J2000) 36 A1 --- Pb [imnrw] Reason for no analysis (1) 38- 43 F6.2 km/s VLSR LSR central velocity to which the spectrometers were tuned 45- 48 F4.2 K Noise ? Temperature noise
Note (1): Reasons as follows: i = unaccomplished measurement (mapping got no complete core or was stopped because we reached regions of other surveys) m = has multiple components and parameters could not be calculated n = no signal r = reference point is not clean and data are invalid w = signal too weak (low S/N ratio)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Mar-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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