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J/PASJ/53/1081       CO molecular clouds in Lupus             (Tachihara+, 2001)

12CO molecular cloud survey and global star formation in Lupus Tachihara K., Toyoda S., Onishi T., Mizuno A., Fukui Y., Neuhaeuser R. <Publ. Astron. Soc. Jap., 53, 1081 (2001)> =2001PASJ...53.1081T
ADC_Keywords: Molecular clouds ; Carbon monoxide Keywords: ISM: clouds - ISM: kinematics and dynamics - ISM: molecules - ISM: structure - stars: formation Abstract: The Lupus star-forming region has been surveyed for molecular clouds in 12CO with the NANTEN radio telescope, and a cloud mass of 1.7x104M has been revealed. We were able to detect 105 molecular clouds, most of which are relatively small and of low mass. The members of the Sco OB 2 association and the X-ray detected pre-main-sequence stars (PMSs) are distributed all around this region. The OB stars and the molecular clouds show exclusive distributions. Large fractions of the PMSs are located away from the molecular clouds, and are thus isolated. The origin of the isolated PMSs is discussed. About 40% of the PMSs have candidates of their parent clouds less massive than 20M within 4pc, which suggests in-situ star formation in the small clouds and their rapid dissipation. The separations from the PMSs to the clouds are typically larger than those in the Chamaeleon region, probably because of coexisting OB stars. From the cloud structures and the distributions of the OB stars, PMSs, and H I expanding shell, it is suggested that the molecular clouds have been effectively dissipated by the OB stars and a shock wave, which may also have triggered star formation in Lupus and the ρ Oph clouds. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 78 113 Observed properties of the clouds table2.dat 38 105 Physical properties of the clouds
See also: J/PASJ/53/971 : CO catalog of LMC molecular clouds (Mizuno+, 2001) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [TTO2001] Sequential number 5- 16 A12 --- Name Cloud name ( 17 A1 --- n_Name [a-d] Previously identified clouds (1) 19- 25 F7.3 deg GLON Galactic longitude (2) 27- 32 F6.3 deg GLAT Galactic latitude (2) 34- 35 I2 h RAh Right ascension (1950) (2) 37- 38 I2 min RAm Right ascension (1950) (2) 40- 43 F4.1 s RAs Right ascension (1950) (2) 45 A1 --- DE- Declination sign (1950) (2) 46- 47 I2 deg DEd Declination (1950) (2) 49- 50 I2 arcmin DEm Declination (1950) (2) 52- 55 F4.1 arcsec DEs Declination (1950) (2) 57- 61 F5.2 K TR* 12CO Absolute peak antenna temperature (3) 63- 66 F4.2 km/s FWHM 12CO FWHM line-width (3) 68- 72 F5.2 km/s Vlsr 12CO centre velocity with respect to LSR (3) 74- 78 F5.2 W(CO) 12CO integrated intensities at the peak positions of the CO clouds (3)
Note (1): These clouds correspond to previously identified clouds as follows: a = Lupus 1 b = Lupus 2 c = Lupus 9 d = This cloud consists of the known clouds of Lupus 3, 4, 5, and 6. Note (2): Position of the 12CO peak integrated intensity of the cloud Note (3): If the 12CO emission at the peak intensity position shows apparent multi-velocity components, the parameters are given for each component. The peak intensity position of the cloud is defined by a Gaussian fitting.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [TTO2001] Sequential name 5- 16 A12 --- Name Cloud name ( 18- 21 F4.1 10+20cm-2 N(H2) H2 column density 23- 28 F6.1 solMass Mass Mass 30- 33 F4.2 pc Rad Radius 35- 38 F4.1 10+2cm-3 n(H2) Average number density
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 18-Feb-2002
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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