J/MNRAS/431/1587 GRS/BGPS sources in Galactic Plane (Eden+, 2013)
Star formation in Galactic spiral arms and the interarm regions.
Eden D.J., Moore T.J.T., Morgan L.K., Thompson M.A., Urquhart J.S.
<Mon. Not. R. Astron. Soc., 431, 1587-1595 (2013)>
=2013MNRAS.431.1587E 2013MNRAS.431.1587E
ADC_Keywords: Galactic plane ; Molecular clouds ; Radio sources
Keywords: stars: formation - ISM: clouds - Galaxy: kinematics and dynamics
Abstract:
The line of sight through the Galactic plane between longitudes
l=37.83° and 42.50° allows for the separation of Galactic Ring
Survey molecular clouds into those that fall within the spiral arms
and those located in the interarm regions. By matching these clouds in
both position and velocity with dense clumps detected in the mm
continuum by the Bolocam Galactic Plane Survey, we are able to look
for changes in the clump formation efficiency (CFE), the ratio of
clump to cloud mass, with Galactic environment. We find no evidence of
any difference in the CFE between the interarm and spiral-arm regions
along this line of sight. This is further evidence that, outside the
Galactic Centre region, the large-scale structures of the Galaxy play
little part in changing the dense, potentially star-forming structures
within molecular clouds.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 42 196 Summary of Galactic Ring Survey (GRS) cloud
parameters and BGPS source associations
table3.dat 72 67 Summary of GRS cloud parameters, number of Bolocam
Galactic Plane Survey (BGPS) source associations,
and the associated BGPS source masses
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See also:
J/ApJ/721/137 : The Bolocam Galactic Plane Survey (BGPS) (Bally+, 2010)
J/ApJS/188/123 : The Bolocam Galactic Plane Survey. II. (Rosolowsky+, 2010)
J/ApJS/182/131 : Molecular clouds and clumps in the GRS (Rathborne+, 2009)
J/AJ/142/94 : Red MSX sources in BGPS (Schenck+, 2011)
J/ApJ/731/90 : Mid-IR content of BGPS sources (Dunham+, 2011)
J/ApJ/741/110 : BGPS. VII. Massive star-forming regions (Dunham+, 2011)
J/ApJS/195/14 : BGPS. V. HCO and N2H of 1.1mm sources (Schlingman+, 2011)
J/ApJS/209/2 : BGPS. X. Dense molecular gas (Shirley+, 2013)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- GRS GRS (Galactic Ring Survey) cloud name
(GLLL.ll+BB.bb)
15- 19 F5.2 km/s Vlsr GRS LSR velocity
21- 25 F5.2 kpc Dist ?=- GRS distance
27- 30 I4 --- BGPS [5878/6106] Bolocam Galactic Plane Survey (BGPS)
source name (NNNN)
32- 36 F5.2 deg GLON BGPS Galactic longitude
38- 42 F5.2 deg GLAT BGPS Galactic latitude
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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- 13 A13 --- GRS GRS (Galactic Ring Survey) cloud name
(GLLL.ll+BB.bb)
15- 19 F5.2 deg GLON Galactic longitude
21- 25 F5.2 deg GLAT Galactic latitude
27- 31 F5.2 km/s Vlsr LSR velocity
34- 41 F8.1 Msun Mcloud ?=- Cloud mass
43- 47 F5.2 kpc Dist ?=- Distance
49- 50 I2 --- Na [0/15] Number of associated BGPS sources
53- 59 F7.1 Msun Mclumps ?=- Mass of clumps in the cloud
61- 65 F5.1 % CFE ?=- Clump formation efficiency (Mclumps/Mcloud)
67- 70 F4.1 % e_CFE ?=- rms uncertainty on CFE
72 A1 --- Loc [a/i] Location of cloud; a=arm, i=interarm
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Jun-2014