Physics – Plasma Physics
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..dppgp1146m&link_type=abstract
American Physical Society, 45th Annual Meeting of the Division of Plasma Physics, October 27-31, 2003, Albuquerque, New Mexico,
Physics
Plasma Physics
Scientific paper
The complex dynamics of an ionization front which is a surface of radiatively driven molecular cloud is a common feature of HII regions. We carried out two-dimensional numerical hydrodynamic simulations with a realistic initial density profile for a neutral gas region, and with perturbations at the ionization front considering detailed physics so far. The energy deposition and release due to the absorption of strong UV radiation from O-stars the recombination effects in the ionized region are included. The radiation loss from shocked molecular gas is also included. We introduce magnetic field's effect into the equation of state to prevent too high density because of radiative collapse in the molecular gas^a. The results are compared with recent detailed observational data of the Eagle Nebula by the Hubble Space Telescope (HST) and Berkeley-Illinois-Maryland Array (BIMA)^b,c. We also discuss the growth of the perturbations at the ionization front and the appropriateness of hydrodynamic instabilities on the ionized front. a. Ryutov, D, & Remington, B., Plasma Phys. Control. Fusion (2002) 44, B407, b. Hester, J. J, et al., AJ (1996) 111, 2349, c. Pound, M. W., et al., ApJ (1998) 493, L113
Kane Jave
Mizuta Akira
Remington Bruce
Ryutov Dmitri D.
Takabe Hideaki
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