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Hierarchical stellar clusters in molecular clouds

Published online by Cambridge University Press:  18 January 2010

Srabani Datta*
Affiliation:
Jodrell Bank Centre for Astrophysics, Turing Building, Upper Brook Street, Manchester M13 9PL, UK email: [email protected]
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Abstract

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Observations show that massive stars always form in clusters or associations, and that the most massive stars form in the dense cores of large clusters. This suggests that accretion processes in cluster cores may be responsible for the formation of stars. In addition, young stellar clusters have been found to contain subclusters, so that star formation can be seen to be a hierarchical process that involves clustering on a range of scales. In this paper, we propose a fractal model of the parental molecular cloud, namely that of the Julia set given by f(z) = z2 + c, where z and c are complex numbers and c = −0.745430 + 0.113008i, to explain this phenomenon and the associated complex structures seen in star-forming regions.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2010

References

Chabrier, G. 2003, PASP, 115, 763CrossRefGoogle Scholar
Clark, P. C., Klessen, R. S., & Bonnell, I. A. 2007, MNRAS, 379, 57CrossRefGoogle Scholar
Datta, S. 2001 in: Feigelson, E. D. & Babu, G. J. (eds.), Statistical Challenges in Astronomy III, Springer, p. 409Google Scholar
Datta, S. 2003, A&A, 401, 193Google Scholar
Datta, S. 2007, PhD thesis, University of CalcuttaGoogle Scholar
Elmegreen, B. G. & Scalo, J. 2004, ARA&A, 42, 211Google Scholar
Elmegreen, B. G. & Falgarone, E. 1996, ApJ, 471, 816CrossRefGoogle Scholar
Falconer, K. 1997, Fractal Geometry, WileyGoogle Scholar
Goodwin, S. P. 2008, A&A, 477, 823Google Scholar
Kramer, C., Stutzki, J., Rohrig, R., & Corneliussen, U. 1998, A&A, 329, 249Google Scholar
Larson, R. B. 1995,MNRAS, 272, 213CrossRefGoogle Scholar
Maíz Appellániz, J. 2001, ApJ, 563, 151CrossRefGoogle Scholar
Salpeter, E. E. 1995, ApJ, 121, 161CrossRefGoogle Scholar
Silk, J. 1995, ApJ (Letters), 438, L41CrossRefGoogle Scholar
Sitnik, T. G. 1990 in: Falgarone, E. & Boulanger, F. (eds.), Fragmentation of Molecular Clouds and Star Formation, IAU Symp. 180, p. 21CrossRefGoogle Scholar
Williams, J. P. & McKee, C. F. 1997, ApJ, 476, 166CrossRefGoogle Scholar