A Simple Perspective on the Mass-Area Relationship in Molecular Clouds

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A Simple Perspective on the Mass-Area Relationship in Molecular Clouds

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Title: A Simple Perspective on the Mass-Area Relationship in Molecular Clouds
Author: Beaumont, Christopher N; Goodman, Alyssa A.; Alves, João F.; Lombardi, Marco; Román-Zúñiga, Carlos G.; Kauffmann, Jens; Lada, Charles J.

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Citation: Beaumont, Christopher N., Alyssa A. Goodman, João F. Alves, Marco Lombardi, Carlos G. Román-Zúñiga, Jens Kauffmann, and Charles J. Lada. 2012. “A simple perspective on the mass-area relationship in molecular clouds.” Monthly Notices of the Royal Astronomical Society 423 (3) (July 1): 2579-2586. doi:10.1111/j.1365-2966.2012.21061.x. http://dx.doi.org/10.1111/j.1365-2966.2012.21061.x.
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Abstract: Despite over 30 yr of study, the mass–area relationship within and among clouds is still poorly understood both observationally and theoretically. Modern extinction data sets should have sufficient resolution and dynamic range to characterize this relationship for nearby molecular clouds, although recent papers using extinction data seem to yield different interpretations regarding the nature and universality of this aspect of cloud structure. In this paper we try to unify these various results and interpretations by accounting for the different ways cloud properties are measured and analysed. We interpret the mass–area relationship in terms of the column density distribution function and its possible variation within and among clouds. We quantitatively characterize regional variations in the column density probability distribution function (PDF). We show that structures both within and among clouds possess the same degree of ‘universality’, in that their PDF means do not systematically scale with structure size. Because of this, mass scales linearly with area.
Published Version: doi:10.1111/j.1365-2966.2012.21061.x
Other Sources: http://arxiv.org/abs/1204.2557
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11688786

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  • FAS Scholarly Articles [6464]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

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