J/ApJS/178/56 CO observations of LMC Giant Molecular clouds (Fukui+, 2008)
The second survey of the molecular clouds in the Large Magellanic Cloud
by NANTEN.
I. Catalog of molecular clouds.
Fukui Y., Kawamura A., Minamidani T., Mizuno Y., Kanai Y., Mizuno N.,
Onishi T., Yonekura Y., Mizuno A., Ogawa H., Rubio M.
<Astrophys. J. Suppl. Ser., 178, 56-70 (2008)>
=2008ApJS..178...56F 2008ApJS..178...56F
ADC_Keywords: Molecular clouds ; Magellanic Clouds ; Interstellar medium ;
Radio lines
Keywords: galaxies: ISM - ISM: molecules - ISM: structure - Magellanic Clouds
radio lines: ISM - stars: formation
Abstract:
The second survey of the molecular clouds in the Large Magellanic
Cloud in 12CO(J=1-0) was carried out by NANTEN. The sensitivity of
this survey is twice as high as that of the previous NANTEN survey,
leading to a detection of molecular clouds with MCO≳2x104solMass.
We identified 272 molecular clouds, 230 of which are detected at three
or more observed positions. We derived the physical properties, such
as size, line width, and virial mass, of the 164 GMCs (Giant Molecular
clouds) that have an extent more than the beam size of NANTEN in both
the major and minor axes.
Description:
We carried out sensitive CO(J=1-0) observations toward the LMC with
NANTEN, a 4m radio telescope of Nagoya University at Las Campanas
Observatory, Chile. The spectrometers were two acousto-optical
spectrometers (AOSs) with 2048 channels. The pointing accuracy was
better than 20", as checked by optical observations of stars with a
CCD camera attached to the telescope, as well as by radio observations
of Jupiter, Venus, and the edge of the Sun.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 70 230 Catalog of 230 Giant Molecular Clouds
table2.dat 70 42 Catalog of 42 small clouds
table3.dat 56 230 Properties of 230 Giant Molecular Clouds
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See also:
J/PASJ/53/971 : CO catalog of LMC molecular clouds (Mizuno+, 2001)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [FKM2008] Identification number (NNN)
5- 9 A5 --- --- LMC N (1)
11- 20 A10 --- LMCN Cloud name (JHHMM-DDMM) (1)
22 I1 h RAh Hour of Right Ascension (J2000) (G1)
24- 25 I2 min RAm Minute of Right Ascension (J2000)
27- 30 F4.1 s RAs Second of Right Ascension (J2000)
32 A1 --- DE- Sign of the Declination (J2000)
33- 34 I2 deg DEd Degree of Declination (J2000)
36- 37 I2 arcmin DEm Arcminute of Declination (J2000)
39- 42 F4.1 arcsec DEs Arcsecond of Declination (J2000)
44 I1 h RABh Hour of Right Ascension (B1950)
46- 47 I2 min RABm Minute of Right Ascension (B1950)
49- 52 F4.1 s RABs Second of Right Ascension (B1950)
54 A1 --- DEB- Sign of the Declination (B1950)
55- 56 I2 deg DEBd Degree of Declination (B1950)
58- 59 I2 arcmin DEBm Arcminute of Declination (B1950)
61- 64 F4.1 arcsec DEBs Arcsecond of Declination (B1950)
66- 70 F5.1 km/s VLSR Local Standard of Rest velocity (2)
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Note (1): `N' stands for `NANTEN'. [FKM2008] LMC N JHHMM-DDMM in Simbad.
Note (2): Derived from an intensity-weighted mean of the velocity
distribution within a cloud.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [FKM2008] Identification number (NNN)
5- 9 A5 --- --- LMC N
11- 20 A10 --- LMCN Cloud name (JHHMM-DDMM)
22- 25 F4.1 km/s DV Observed FWHM of the line width (1)
27- 29 I3 pc R ? Cloud size (2)
31- 33 I3 deg PA Cloud position angle
35- 37 I3 pc Maj Cloud major axis (3)
39- 40 I2 pc Min ? Cloud minor axis (3)
42- 45 F4.1 10+4K.km/s.pc2 LCO Cloud CO luminosity
47- 50 F4.1 10+5solMass MVir ? Cloud virial mass (4)
52- 56 F5.1 10+5solMass MCO Cloud CO mass (5)
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Note (1): Derived from the second moment of the spectra within a cloud.
Note (2): Derived by a geometric mean of the second spatial moment along
the major and minor axis. Radius is blank when the minor axis is not
derivable.
Note (3): Without beam deconvolution. Minor axis without deconvolution is
blank when a cloud was detected only at one observed point along the
minor axis.
Note (4): MVir is blank when R is blank.
Note (5): Derived from LCO with XCO=7x1020cm-2/(K.km/s)
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Global Notes:
Note (G1): Position of the clouds derived from an intensity-weighted mean
over all the pixels of a cloud.
History:
From electronic version of the journal
Reference:
Kawamura et al. Paper II. 2009ApJS..184....1K 2009ApJS..184....1K. Cat J/ApJS/184/1.
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 20-Jul-2009