J/ApJ/699/1092 Giant molecular clouds (SRBY) (Heyer+, 2009)
Re-examining Larson's scaling relationships in Galactic molecular clouds.
Heyer M., Krawczyk C., Duval J., Jackson J.M.
<Astrophys. J., 699, 1092-1103 (2009)>
=2009ApJ...699.1092H 2009ApJ...699.1092H
ADC_Keywords: Molecular clouds ; Velocity dispersion ; Interstellar medium
Keywords: ISM: clouds - ISM: kinematics and dynamics
Abstract:
The properties of Galactic molecular clouds tabulated by Solomon et
al. (SRBY; 1987ApJ...319..730S 1987ApJ...319..730S) are re-examined using the Boston
University-FCRAO Galactic Ring Survey of 13COJ=1-0 emission. These
new data provide a lower opacity tracer of molecular clouds and
improved angular and spectral resolution compared with previous
surveys of molecular line emission along the Galactic Plane. We
calculate giant molecular cloud (GMC) masses within the SRBY cloud
boundaries assuming local thermodynamic equilibrium (LTE) conditions
throughout the cloud and a constant H2 to 13CO abundance, while
accounting for the variation of the 12C/13C with galactocentric
radius.
Description:
The Boston University-FCRAO Galactic Ring Survey (GRS) imaged the
13COJ=1-0 emission between Galactic longitudes 18° and 56°
and latitudes, |b|≤1° with the FCRAO 14m telescope between
1998-2005 (Jackson et al. 2006ApJS..163..145J 2006ApJS..163..145J).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 84 158 Rederived Giant Molecular Cloud (GMC) properties
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See also:
J/PASJ/62/557 : CO clouds in the Galactic Center from NANTEN (Takeuchi+, 2010)
J/ApJS/182/131 : Molecular clouds and clumps in the GRS (Rathborne+, 2009)
J/ApJ/699/1153 : Distances to GRS molecular clouds (Roman-Duval+, 2009)
J/ApJ/672/930 : Distant CO clouds in third galactic quadrant (Vazquez+, 2008)
J/AJ/131/1501 : Intermediate-velocity clouds in the CGPS (Kerton+, 2006)
J/ApJ/626/887 : HI clouds in Southern Galactic Plane Survey (Kavars+, 2005)
J/PASJ/57/917 : CO molecular clouds in southern Galactic Warp (Nakagawa+,
2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- SRBY Solomon et al. 1987ApJ...319..730S 1987ApJ...319..730S
identification number
5- 9 F5.2 deg GLON Galactic longitude (1)
11- 15 F5.2 deg GLAT Galactic latitude (1)
17- 21 F5.1 km/s Vel LSR velocity (1)
23- 25 F3.1 kpc Rg Galactocentric radius (1)
27- 30 F4.1 kpc Dist Heliocentric distance (1)
32- 34 F3.1 km/s sigA1 Velocity dispersion within A1 area (1)
36- 39 F4.1 pc rA1 Radius with A1 area (1)
41- 48 E8.2 K.km/s.pc2 LCOA1 CO luminosity (1)
50- 57 E8.2 Msun M-A1 Mass assuming LTE (1)
59- 61 F3.1 km/s sigA2 Velocity dispersion within A2 area (2)
63- 66 F4.1 pc rA2 Radius with A2 area (2)
68- 75 E8.2 K.km/s.pc2 LCOA2 CO luminosity within A2 area (2)
77- 84 E8.2 Msun M-A2 Mass assuming LTE within A2 area (2)
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Note (1): Within SRBY Defined Area, A1. See section 2 for further details.
Note (2): Within Half Max Isophote of N(H2), A2.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Jul-2011