J/ApJ/805/157 BGPS. XIII. Mass functions (Ellsworth-Bowers+, 2015)
The Bolocam Galactic Plane Survey.
XIII. Physical properties and mass functions of dense molecular cloud
structures.
Ellsworth-Bowers T.P., Glenn J., Riley A., Rosolowsky E., Ginsburg A.,
Evans II N.J., Bally J., Battersby C., Shirley Y.L., Merello M.
<Astrophys. J., 805, 157 (2015)>
=2015ApJ...805..157E 2015ApJ...805..157E (SIMBAD/NED BibCode)
ADC_Keywords: Molecular clouds ; Millimetric/submm sources
Keywords: Galaxy: structure; ISM: clouds; submillimeter: ISM; stars: formation
Abstract:
We use the distance probability density function (DPDF) formalism of
Ellsworth-Bowers et al. (2015, J/ApJ/799/29) to derive physical
properties for the collection of 1710 Bolocam Galactic Plane Survey
(BGPS) version 2 sources with well-constrained distance estimates. To
account for Malmquist bias, we estimate that the present sample of
BGPS sources is 90% complete above 400M☉ and 50% complete above
70M☉. The mass distributions for the entire sample and
astrophysically motivated subsets are generally fitted well by a
lognormal function, with approximately power-law distributions at high
mass. Power-law behavior emerges more clearly when the sample
population is narrowed in heliocentric distance (power-law index
α=2.0±0.1 for sources nearer than 6.5kpc and α=1.9+/0.1
for objects between 2 and 10 kpc). The high-mass power-law indices are
generally 1.85≤α≤2.05 for various subsamples of sources,
intermediate between that of giant molecular clouds and the stellar
initial mass function. The fit to the entire sample yields a high-mass
power-law α^=1.94-0.10_+0.34. Physical properties of BGPS
sources are consistent with large molecular cloud clumps or small
molecular clouds, but the fractal nature of the dense interstellar
medium makes it difficult to map observational categories to the
dominant physical processes driving the observed structure. The
face-on map of the Galactic disk's mass surface density based on BGPS
dense molecular cloud structures reveals the high-mass star-forming
regions W43, W49, and W51 to be prominent mass concentrations in the
first quadrant. Furthermore, we present a 0.25kpc resolution map of
the dense gas mass fraction across the Galactic disk that peaks around
5%.
Description:
The BGPS version 2 (BGPS V2; Aguirre et al. 2011ApJS..192....4A 2011ApJS..192....4A;
Ginsburg et al. 2013ApJS..208...14G 2013ApJS..208...14G), is a λ=1.1mm continuum
survey covering 192deg2 at 33" resolution.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 111 1710 Physical properties of BGPS distance catalog sources
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See also:
VIII/39 : Composite CO Survey of the Milky Way (Dame+ 1987)
VIII/64 : Westerhout's Catalogue of 82 Discrete Sources (Westerhout 1958)
J/ApJS/218/1 : BGPS. XI. SHARC-II 350um observations (Merello+, 2015)
J/ApJ/799/29 : BGPS. XII. DR2 distance catalog (Ellsworth-Bowers+, 2015)
J/ApJ/780/173 : Masses of giant molecular clouds in MW (Battisti+, 2014)
J/A+A/561/A148 : Mass Distribution of Infrared Dark Clouds (Gomez+, 2014)
J/ApJS/209/2 : The BGPS. X. Dense molecular gas (Shirley+, 2013)
J/ApJ/770/39 : BGPS. VIII. MIR kinematic distances (Ellsworth-Bowers+, 2013)
J/MNRAS/422/3178 : Distances of 793 BGPS sources (Eden+, 2012)
J/ApJ/741/110 : The BGPS. VII. Massive star-forming regions (Dunham+, 2011)
J/ApJS/195/14 : The Bolocam Galactic Plane Survey. V. (Schlingman+, 2011)
J/A+A/526/A151 : Hi-Gal sources distance determination (Russeil+, 2011)
J/ApJ/723/492 : Physical data of GRS molecular clouds (Roman-Duval+, 2010)
J/ApJS/188/123 : The Bolocam Galactic Plane Survey. II. (Rosolowsky+, 2010)
J/ApJ/707/1824 : BLAST Vela sources (Netterfield+, 2009)
J/ApJ/699/1092 : Giant molecular clouds (SRBY) (Heyer+, 2009)
J/ApJS/175/509 : Ammonia spectral atlas in Perseus (Rosolowsky+, 2008)
J/A+A/476/1243 : Millimeter continuum mapping of Cygnus X (Motte+, 2007)
J/ApJ/638/293 : 1.1mm sources in the Perseus Molecular Cloud (Enoch+, 2006)
J/A+A/291/943 : Protostellar cores (Ossenkopf+, 1994)
http://irsa.ipac.caltech.edu/data/BOLOCAM_GPS/ : Bolocam GPS archive on IRSA
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [2235/8225] Bolocat V2.1 catalog number
(as in Ellsworth-Bowers, 2015, J/ApJ/799/29)
6- 12 F7.3 deg GLON Galactic longitude
14- 19 F6.3 deg GLAT Galactic latitude
21- 26 F6.2 Jy Flux [0.06/200.4] Integrated 1.1mm BGPS flux
density (1)
28- 32 F5.2 Jy e_Flux [0.03/12.2] Standard error on Flux
34- 38 F5.1 arcsec Theta ? Deconvolved angular radius (2)
40- 44 F5.2 kpc Dist [0.5/16.5] Heliocentric Distance (3)
46- 49 F4.2 kpc e_Dist [0.02/1.4] Lower error in Dist
51- 54 F4.2 kpc E_Dist [0.02/2] Upper error in Dist
56- 59 F4.2 [Msun] Mass [0.2/5] Mass (log10)
61- 64 F4.2 [Msun] e_Mass [0.1/0.9] Lower error in Mass
66- 69 F4.2 [Msun] E_Mass [0.1/1.1] Upper error in Mass
71- 76 F6.2 pc Rad [0.05/7.5]? Physical radius
78- 83 F6.2 pc e_Rad [0/1.1]? Lower error in Rad
85- 90 F6.2 pc E_Rad [0/0.6]? Upper error in Rad
92- 97 F6.2 [cm-3] Dens [2/6]? Number density (log10)
99-104 F6.2 [cm-3] e_Dens [0.1/0.4]? Lower error in Dens
106-111 F6.2 [cm-3] E_Dens [0.1/0.5]? Upper error in Dens
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Note (1): The source-integrated lambda=1.1mm flux density.
Note (2): The deconvolved radius of the catalog object, computed using
Equation (6).
Note (3): The appropriate distance estimate from EB15 (Ellsworth-Bowers et al.,
2015, J/ApJ/799/29); d_bar for objects near the tangent point and
d_ML otherwise.
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History:
From electronic version of the journal
References:
Aguirre et al. Paper I. 2011ApJS..192....4A 2011ApJS..192....4A
Rosolowsky et al. Paper II. 2010ApJS..188..123R 2010ApJS..188..123R Cat. J/ApJS/188/123
Dunham et al. Paper III. 2010ApJ...717.1157D 2010ApJ...717.1157D
Bally et al. Paper IV. 2010ApJ...721..137B 2010ApJ...721..137B Cat. J/ApJ/721/137
Schlingman et al. Paper V. 2011ApJS..195...14S 2011ApJS..195...14S Cat. J/ApJS/195/14
Dunham et al. Paper VI. 2011ApJ...731...90D 2011ApJ...731...90D Cat. J/ApJ/731/90
Dunham et al. Paper VII. 2011ApJ...741..110D 2011ApJ...741..110D Cat. J/ApJ/741/110
Ellsworth-Bowers et al. Paper VIII. 2013ApJ...770...39E 2013ApJ...770...39E
Ginsburg et al. Paper IX. 2013ApJS..208...14G 2013ApJS..208...14G
Shirley et al. Paper X. 2013ApJS..209....2S 2013ApJS..209....2S Cat. J/ApJS/209/2
Merello et al. Paper XI. 2015ApJS..218....1M 2015ApJS..218....1M Cat. J/ApJS/218/1
Ellsworth-Bowers et al. Paper XII. 2015ApJ...799...29E 2015ApJ...799...29E Cat. J/ApJ/799/29
Ellsworth-Bowers et al. Paper XIII. 2015ApJ...805..157E 2015ApJ...805..157E This catalog
Svoboda et al. Paper XIV. 2016ApJ...822...59S 2016ApJ...822...59S Cat. J/ApJ/822/59
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 17-Sep-2015