English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We investigate the mass function of cold, dusty clumps in 11 low- andhigh-mass star-forming regions. Using a homogeneous fitting technique, weanalyze the shape of each region's clump mass function and examine thecommonalities among them. We find that the submillimeter continuum clump massfunction in low-mass star-forming regions is typically best fit by a lognormaldistribution, while that in high-mass star-forming regions is better fit by adouble power law. A single power law clump mass distribution is ruled out inall cases. Fitting all of the regions with a double power law, we find the meanpower law exponent at the high-mass end of each mass function is alpha_high =-2.4+/-0.1, consistent with the Salpeter result of alpha = -2.35. We find noregion-to-region trend in alpha_high with the mass scale of the clumps in agiven region, as characterized by their median mass. Similarly, nonnon-parametric tests show that the shape of the clump mass function does notchange much from region to region, despite the obvious changes in the intrinsicmass scale. This result is consistent with the hypothesis that the clump massdistribution is determined by a highly stochastic process, such as turbulentfragmentation. It may also suggest that the data reduction and analysistechniques strongly affect the shape of the derived mass function.Comment: 34 pages, 10 figures, accepted for publication in the October 10,  2006 issue of the Astrophysical Journa

High‐Mass Star Formation. III. The Functional Form of the Submillimeter Clump Mass Function