Journal ArticleDOI
A fractal origin for the mass spectrum of interstellar clouds
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TLDR
In this paper, the fractal and scale-free nature of interstellar CO clouds with power indices that are independent of distance has been investigated and the results are αL = 1 + D and αM = 1+ D/κ for interstellar fractal dimension D = 2.3 ± 0.3 and a value of κ in the range 2.4-3.7.Abstract:
Interstellar molecular clouds have power-law size L and mass M distributions of the form n(L) dL = L−αL dL and n(M) dM = M−αM dM, where M Lk is also a power law. These relations are shown to result from the fractal and scale-free nature of interstellar gas with power indices that are independent of distance. The results are αL = 1 + D and αM = 1 + D/κ for interstellar fractal dimension D = 2.3 ± 0.3 and a value of κ in the range 2.4-3.7, as determined from cloud surveys in the literature. The same fractal dimension also results from the expected relation D = κ when the M(L) correlation includes many different surveys, spanning a range of 1010 in mass. These results imply that interstellar CO clouds are the unresolved parts of a pervasive fractal structure in the interstellar gas. The similarity between n(M) for interstellar clouds and n(M) for globular clusters suggests that the clusters formed inside fractal progenitor clouds at a nearly constant efficiency.read more
Citations
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Journal ArticleDOI
Theory of Star Formation
TL;DR: In this paper, an overall theoretical framework and the observations that motivate it are outlined, outlining the key dynamical processes involved in star formation, including turbulence, magnetic fields, and self-gravity.
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Control of star formation by supersonic turbulence
TL;DR: A review of the successes and problems of both the classical dynamical theory and the standard theory of magnetostatic support, from both observational and theoretical perspectives, is given in this paper.
Journal ArticleDOI
From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
Ph. André,Alexander Men'shchikov,Sylvain Bontemps,Vera Könyves,Frédérique Motte,Nicola Schneider,P. Didelon,Vincent Minier,Paolo Saraceno,Derek Ward-Thompson,J. Di Francesco,Glenn J. White,Glenn J. White,Sergio Molinari,Leonardo Testi,Alain Abergel,Matthew Joseph Griffin,Th. Henning,Pierre Royer,Bruno Merín,R. Vavrek,M. Attard,Doris Arzoumanian,C. D. Wilson,Peter A. R. Ade,Herve Aussel,J.-P. Baluteau,Milena Benedettini,J.-Ph. Bernard,Joris Blommaert,L. Cambrésy,Pierre Cox,A. Di Giorgio,Peter Charles Hargrave,Martin Hennemann,Maohai Huang,Jason M. Kirk,Oliver Krause,Ralf Launhardt,S. J. Leeks,J. Le Pennec,Jin-Zeng Li,Peter G. Martin,Anaëlle Maury,Göran Olofsson,Alain Omont,Nicolas Peretto,Stefano Pezzuto,Timo Prusti,Helene Roussel,D. Russeil,Marc Sauvage,Bruce Sibthorpe,Aurora Sicilia-Aguilar,L. Spinoglio,C. Waelkens,Adam Woodcraft,Annie Zavagno +57 more
TL;DR: In this paper, the first results from the Gould Belt survey, obtained toward the Aquila Rift and Polaris Flare regions during the'science demonstration phase' of Herschel, were summarized.
Journal ArticleDOI
The Formation of Massive Stars from Turbulent Cores
TL;DR: In this paper, the authors show that massive-star forming regions are supersonically turbulent, and that the molecular cores out of which individual massive stars form are as well, and they apply these results to predict the properties of protostars thought to be powering several observed hot molecular cores.
Control of Star Formation by Supersonic Turbulence
TL;DR: A review of the successes and problems of both the classical dynamical theory and the standard theory of magnetostatic support, from both observational and theoretical perspectives, is given in this article.
References
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Journal ArticleDOI
The solution topology of the Eddington quartic-like equationY=αX 4+X−1
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