Two Models of Magnetic Support for Photoevaporated Molecular Clouds |
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| Authors: | D D Ryutov J O Kane A Mizuta M W Pound B A Remington |
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| Institution: | (1) Lawrence Livermore National Laboratory, Livermore, CA, USA;(2) Institute of Laser Engineering, Osaka University, Osaka, Japan;(3) Astronomy Department, University of Maryland, College Park, MD, USA |
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| Abstract: | The thermal pressure inside molecular clouds is insufficient for maintaining the pressure balance at an ablation front at
the cloud surface illuminated by nearby UV stars. Most probably, the required stiffness is provided by the magnetic pressure.
After surveying existing models of this type, we concentrate on two of them: the model of a quasi-homogeneous magnetic field
and the recently proposed model of a “magnetostatic turbulence”. We discuss observational consequences of the two models,
in particular, the structure and the strength of the magnetic field inside the cloud and in the ionized outflow. We comment
on the possible role of reconnection events and their observational signatures. We mention laboratory experiments where the
most significant features of the models can be tested. |
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| Keywords: | molecular clouds photoevaporation MHD turbulence reconnection |
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