2017MNRAS.469.2286Z

Query : 2017MNRAS.469.2286Z

2017MNRAS.469.2286Z - Mon. Not. R. Astron. Soc., 469, 2286-2291 (2017/August-1)

Mass-size scaling M ∼ r1.67 of massive star-forming clumps - evidences of turbulence-regulated gravitational collapse.

ZHANG C.-P. and LI G.-X.

Abstract (from CDS):

We study the fragmentation of eight massive clumps using data from ATLASGAL 870 µm, SCUBA 850 and 450 µm, PdBI 1.3 and 3.5 mm, and probe the fragmentation from 1 to 0.01 pc scale. We find that the masses and the sizes of our objects follow M ∼ r^1.68 ± 0.05^. The results are in agreements with the predictions of Li where M ∼ r5/3. Inside each object, the densest structures seem to be centrally condensed, with ρ(r) ∼ r–2. Our observational results support a scenario where molecular gas in the Milky Way is supported by a turbulence characterized by a constant energy dissipation rate, and gas fragments like clumps and cores are structures which are massive enough to be dynamically detached from the ambient medium.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): gravitation - instabilities - turbulence - ISM: kinematics and dynamics - galaxies: star formation - galaxies: star formation

CDS comments: The eight clumps mentionned in section 2.1 are not identified (not enough information).

Simbad objects: 3

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Number of rows : 3
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 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
2 QSO B1741-038 Bla 17 43 58.85613537 -03 50 04.6167326     20.40 17.98   ~ 583 1
3 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 837 0

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