SIMBAD references

2012MNRAS.424.1658P - Mon. Not. R. Astron. Soc., 424, 1658-1671 (2012/August-2)

Molecular clumps in the W51 giant molecular cloud.


Abstract (from CDS):

In this paper, we present a catalogue of dense molecular clumps located within the W51 giant molecular cloud (GMC). This work is based on Heterodyne Array Receiver Programme 13CO J = 3–2 observations of the W51 GMC and uses the automated CLUMPFIND algorithm to decompose the region into a total of 1575 clumps of which 1130 are associated with the W51 GMC. We clearly see the distinct structures of the W51 complex and the high-velocity stream previously reported. We find the clumps have characteristic diameters of 1.4pc, excitation temperatures of 12K, densities of 5.6 {x} 1021/cm2, surface densities 0.02g/cm2 and masses of 90M. We find a total mass of dense clumps within the GMC of 1.5 {x} 105M, with only 1 per cent of the clumps detected by number and 4 per cent by mass found to be supercritical. We find a clump-forming efficiency of 14±1 per cent for the W51 GMC and a supercritical clump-forming efficiency of \mn 0\mo.\mn 5\mo –\mn 0.5\mo +\mn 2.3 per cent. Looking at the clump mass distribution, we find it is described by a single power law with a slope of alpha\mo 0.2 above ∼ 100M. By comparing locations of supercritical clumps and young clusters, we see that any future star formation is likely to be located away from the currently active W51A region.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society 2012 RAS

Journal keyword(s): molecular data - catalogues - stars: formation - ISM: clouds - submillimetre: ISM

VizieR on-line data: <Available at CDS (J/MNRAS/424/1658): table1.dat table2.dat>

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

Simbad objects: 17

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