J/ApJS/191/232 CO survey of W51 molecular cloud (Bieging+, 2010)
The arizona radio observatory CO mapping survey of galactic molecular clouds.
I. The W51 region in CO and 13CO J = 2-1 emission.
Bieging J.H., Peters W.L., Kang M.
<Astrophys. J. Suppl. Ser., 191, 232-246 (2010)>
=2010ApJS..191..232B 2010ApJS..191..232B
ADC_Keywords: Carbon monoxide ; H II regions ; Radio lines ;
Millimetric/submm sources
Keywords: H II regions - ISM: clouds - ISM: individual objects (W51) -
ISM: kinematics and dynamics - ISM: molecules
Abstract:
We present 38" resolution maps of the CO and 13COJ=2-1 lines in the
molecular clouds toward the HII region complex W51. The maps cover a
1.25x1° section of the galactic plane and span +30 to +85km/s
(LSR) in velocity. The spectral resolution is ∼1.3km/s. The velocity
range of the images includes all the gas in the Sagittarius spiral
arm. Color figures display the peak line brightness temperature, the
velocity-integrated intensity, and 2km/s channel-averaged maps for
both isotopologs, and also the CO/13COJ=2-1 line intensity ratio as
a function of velocity. The CO and 13CO line intensity image cubes
are made available in standard FITS format as electronically readable
tables. We compare our molecular line maps with the 1.1mm continuum
image from the BOLOCAM Galactic Plane Survey (BGPS; Aguirre et al.
2011ApJS..192....4A 2011ApJS..192....4A; Rosolowsky et al. 2010, Cat. J/ApJS/188/123).
From our 13CO image cube, we derive kinematic information for the 99
BGPS sources in the mapped field in the form of Gaussian component
fits. The integrated 13CO line intensity and the 1.1mm source flux
density show only a modest degree of correlation for the 99 sources,
likely due to a range of dust and gas physical conditions within the
sources. However, the 1.1mm continuum surface brightness and the
integrated 13CO line intensity for small regions containing single
BGPS sources and molecular clouds show very good correlations in many
cases.
Description:
Observations were made with the Heinrich Hertz Submillimeter Telescope
(HHT) on Mount Graham, AZ and were carried out in several observing
sessions from 2005 June to 2007 November.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 54 218 13CO(J=2-1) line properties at BGPS source
positions
fig/* . 2 CO and 13CO line image data cubes fits files
map.dat 80 2 Fits files list
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See also:
J/ApJS/196/18 : CO survey of galactic molecular clouds. II. (Bieging+, 2011)
J/ApJS/188/123 : The Bolocam Galactic Plane Survey. II. (Rosolowsky+, 2010)
J/ApJ/686/384 : 12CO, 13CO, C18O survey of IRDCs (Du+, 2008)
J/ApJS/166/567 : Radio Molecular lines in infrared dark clouds (Ragan+, 2006)
J/MNRAS/367/1609 : RCW 106 Giant Molecular Cloud 13CO mapping (Bains+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- BGPS BGPS (Rosolowsky et al. 2010, Cat. J/ApJS/188/123;
in Simbad) catalog number
6- 11 F6.3 deg GLON Galactic longitude of BGPS peak
13- 18 F6.3 deg GLAT Galactic latitude of BGPS peak
20- 25 F6.3 Jy S40 BGPS 40" diameter aperture 1.1mm continuum
flux density
27- 31 F5.1 K.km/s 13CO Integrated 13CO(J=2-1) emission line
intensity (1)
33 I1 --- Comp ? Gaussian component number for multiple 13CO
component fits
35- 39 F5.2 K Amp Main-beam brightness temperature amplitude of
13CO Gaussian fit component
41- 44 F4.1 km/s VPeak Local Standard of Rest velocity of peak of 13CO
Gaussian fit component
46- 49 F4.1 km/s FWHM Velocity full-width at half-maximum of 13CO
Gaussian fit component
51- 54 F4.2 K RMS ? RMS of residual (1)(2)
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Note (1): In main-beam brightness temperature.
Note (2): To Gaussian fit including all components.
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Byte-by-byte Description of file: map.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- FileName Name of the fits file in subdirectory fig
11- 80 A70 --- Title Title of the file
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History:
From electronic version of the journal
References:
Bieging & Peters. Paper II. (W3) 2011ApJS..196...18B 2011ApJS..196...18B Cat. J/ApJS/196/18
Burleigh et al. Paper III. (Serpens) 2013ApJS..209...39B 2013ApJS..209...39B Cat. J/ApJS/209/39
Bieging et al. Paper IV. (NGC 1333) 2014ApJS..214....7B 2014ApJS..214....7B Cat. J/ApJS/214/7
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 12-Jan-2011