2006ApJ...653.1325S

Query : 2006ApJ...653.1325S

2006ApJ...653.1325S - Astrophys. J., 653, 1325-1335 (2006/December-3)

The characterization and galactic distribution of infrared dark clouds.

SIMON R., RATHBORNE J.M., SHAH R.Y., JACKSON J.M. and CHAMBERS E.T.

Abstract (from CDS):

Using 13CO J=1⟶0 molecular line emission from the Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey (BU-FCRAO GRS), we have established kinematic distances to 313 infrared dark clouds (IRDCs) by matching the morphology of the molecular line emission in distinct velocity channels to their mid-infrared extinction. The Galactic distribution of IRDCs shows an enhancement toward the Galaxy's most massive and active star-forming structure, the so-called 5 kpc ring. IRDCs have typical sizes of ∼5 pc, peak column densities of ∼1022/cm2, LTE masses of ∼5x103 M☉, and volume-averaged H2densities of ∼2x103/cm3. The similarity of these properties to those of molecular clumps associated with active star formation suggests that IRDCs represent the densest clumps within giant molecular clouds where clusters may eventually form.

Abstract Copyright: ∼

Journal keyword(s): ISM: Dust, Extinction - Galaxy: Structure - Infrared: ISM - Radio Lines: ISM - Stars: Formation

VizieR on-line data: <Available at CDS (J/ApJ/653/1325): table1.dat table2.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 MSXDC G024.60+00.08 DNe 18 35 39.40 -07 18 50.9           ~ 9 0

Query : 2006ApJ...653.1325S

Basic data :
MSXDC G024.60+00.08 -- Dark Cloud (nebula)
Other object types: otypes_help 		DNe (), Cld (MSXDC)
ICRS coord. (ep=J2000) : 		18 35 39.40 -07 18 50.9 [ ] D 2007ApJ...662.1082R
FK4 coord. (ep=B1950 eq=1950) : 		18 32 57.11 -07 21 20.4 [ ]
Gal coord. (ep=J2000) : 		024.62808 +00.15388 [ ]
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Hierarchy : number of linked objects
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MSXDC G024.60+00.08

References (9 between 1850 and 2026) (Total 9)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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