J/PASJ/57/917 CO molecular clouds in southern Galactic Warp (Nakagawa+, 2005)
An unbiased search for molecular clouds in the southern Galactic Warp.
Nakagawa M., Onishi T., Mizuno A., Fukui Y.
<Publ. Astron. Soc. Jap., 57, 917-931 (2005)>
=2005PASJ...57..917N 2005PASJ...57..917N
ADC_Keywords: Molecular clouds ; Radio lines
Keywords: Galaxy: warp - ISM: abundances - ISM: clouds - radio lines: ISM
Abstract:
We made an unbiased search for molecular clouds in the Galactic Warp.
This survey, covering an area of 56 square degrees at l=252° to
266° and b=-5° to -1°, revealed 70 molecular clouds, while
only 6 clouds were previously known in this sector at R≳14.5kpc.
Description:
Observations were made in the J=1-012CO emission line at 2.6mm
wavelength with the NANTEN telescope at the Las Campanas Observatory
in Chile in the period from 2001 July to 2002 August.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 91 71 Observed properties and physical quantities
of 70 CO clouds.
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See also:
J/PASJ/53/1081 : CO molecular clouds in Lupus (Tachihara+, 2001)
J/PASJ/53/971 : CO catalog of LMC molecular clouds (Mizuno+, 2001)
J/PASJ/56/313 : 13CO survey of Mon + CMa molecular clouds (Kim+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [NOM2005] Running number
4- 9 F6.2 deg GLON Position of observed points with maximum
12CO integrated intensities within CO clouds
11- 15 F5.2 deg GLAT Position of observed points with maximum
12CO integrated intensities within CO clouds
17- 21 F5.1 km/s VLSR ?=- LSR velocity is derived from a Gaussian
fitting for the composite line profiles
23- 26 F4.1 kpc Dist ?=- Distance from the Sun
28- 31 F4.1 kpc R ?=- Distance from the galactic center (1)
33- 37 I5 pc Z ?=- Distance from the galactic plane
(b=0, Z=Dist*tan(b))
39- 44 F6.2 K.km/s IICO ?=- Total CO integrated intensity,
∫TR*dV, sum of integrated intensity
of all observed positions in one cloud.
46- 48 F3.1 km/s dV ?=- Composite line width (from Gaussian fit to
composite spectrum)
50- 53 F4.1 pc Rad ?=- Radius of the CO cloud
55- 58 F4.1 pc Radc ?=- Corrected radius of the CO cloud
60- 65 F6.1 pc2.K.km/s LCO ?=- Luminosity
67- 71 I5 solMass MCO ?=- Cloud mass derived from CO luminosity by
using X=5.6x1020cm-2/(K.km/s)
73- 78 I6 solMass Mvir ?=- Virial mass = 210xRadcxdV2
80- 91 A12 --- Com Comment (2)
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Note (1): Distance from the galactic center for b=0, assuming flat rotation
curve (R☉=8.5kpc, V☉=220km/s).
Note (2): Comments are as follows:
cold IRAS = clouds which have a cold IRAS point source near the peak
double peak = clouds which have multiple velocity components in a
single beam and neither of them is well-resolved
not complete = For the last cloud, No. 71 (no data)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 29-Jun-2006