2006ApJ...650..970R


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.17CET22:36:48

2006ApJ...650..970R - Astrophys. J., 650, 970-984 (2006/October-3)

High-mass star formation. III. The functional form of the submillimeter clump mass function.

REID M.A. and WILSON C.D.

Abstract (from CDS):

We investigate the mass function of cold, dusty clumps in 11 low- and high-mass star-forming regions. Using a homogeneous fitting technique, we analyze the shape of each region's clump mass function and examine the commonalities among them. We find that the submillimeter continuum clump mass function in low-mass star-forming regions is typically best fitted by a lognormal distribution, while that in high-mass star-forming regions is better fitted by a double power law. A single power-law clump mass distribution is ruled out in all cases. Fitting all of the regions with a double power law, we find that the mean power-law exponent at the high-mass end of each mass function is αhigh=-2.4±0.1, consistent with the Salpeter result of α=-2.35. We find no region-to-region trend in αhighwith the mass scale of the clumps in a given region, as characterized by their median mass. Similarly, nonparametric tests show that the shape of the clump mass function does not change much from region to region, despite the obvious changes in the intrinsic mass scale. This result is consistent with the hypothesis that the clump mass distribution is determined by a highly stochastic process, such as turbulent fragmentation. It may also suggest that the data reduction and analysis techniques strongly affect the shape of the derived mass function.

Abstract Copyright:

Journal keyword(s): ISM: Structure - Methods: Data Analysis - Stars: Formation - Submillimeter

Simbad objects: 13

goto Full paper

goto View the reference in ADS

Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1142 0
2 GAL 332.80-00.60 HII 16 19 47 -51 04.1           ~ 91 1
3 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2971 0
4 M 8 HII 18 03 37 -24 23.2           ~ 550 1
5 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1469 0
6 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 897 2
7 SNR G030.8-00.0 SNR 18 47 32 -01 56.5           ~ 430 0
8 NGC 7538 OpC 23 13 37 +61 30.0           ~ 823 0
9 [WBN74] NGC 7538 IRS 3 HII 23 13 43.646 +61 28 14.02           ~ 62 0
10 [WBN74] NGC 7538 IRS 11 Y*O 23 13 43.960 +61 26 58.85           ~ 53 0
11 [WBN74] NGC 7538 IRS 1 Y*O 23 13 45.318 +61 28 11.69           ~ 362 3
12 [WBN74] NGC 7538 IRS 2 HII 23 13 45.474 +61 28 19.87           ~ 70 0
13 [WBN74] NGC 7538 IRS 9 Y*O 23 14 01.63 +61 27 20.2           ~ 340 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2006ApJ...650..970R and select 'bookmark this link' or equivalent in the popup menu


2020.02.17-22:36:48

© Université de Strasbourg/CNRS

    • Contact