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Structure of the turbulent atomic gas and formation of molecular clouds

Published online by Cambridge University Press:  04 October 2008

C. Kramer ,
S. Aalto ,
R. Simon ,
P. Hennebelle  and
E. Audit
P. Hennebelle
Affiliation:
École Normale Supérieure and Observatoire de Paris, France
E. Audit
Affiliation:
Service d'Astrophysique, Commissariat à l'Énergie Atomique, France
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Abstract

We present 3D high resolution numerical simulations of turbulent converging interstellar atomic hydrogen flows. First, we report pure hydrodynamical simulations from which we infer statistics of the CNM structures. We find that the CNM structures are characterized by a mass spectrum dN/dM ∝ M-1.7-1.8, a mass-size relation M ∝ L2.3-2.5, and a velocity dispersion σ ∝ L0.4-05. These are reminiscent of what has been inferred for CO molecular clumps. Then we present a 3D calculation, which includes magnetic field and self-gravity with the purpose of studying the formation of molecular clouds.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 31: Far-Infrared Workshop 2007 , 2008 , pp. 15 - 18
Copyright
© EAS, EDP Sciences, 2008

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