The structure and evolution of interstellar bubbles in a multiphase interstellar medium. I - Physical model
M. T. Wolff, R. H. Durisen;
MNRAS, 1987, 224, 701
ABSTRACT:A method for modeling the structure of interstellar bubbles in a multiphase
interstellar medium is presented.
The computational scheme involves modeling
both the intercloud fluid (ICF) and the clouds on separate numerical
grids.
The standard hydrodynamic equations must be modified to include effects
of mass, momentum, and energy exchange between the ICF and the
clouds.
These exchange processes come about principally because Lyman continuum
radiation from the central star ionizes the cold clouds, providing a large source
of mass injection to the ICF.
A less significant source of mass exchange
is thermal evaporation of clouds due to hot gas in the bubble
interior.
The cloud motions caused both by drag against the ICF and by the
Oort-Spitzer rocket effect are calculated.
The numerical scheme is tested by
calculating the structure of both homogeneous bubbles and multiphase supernova
remnants and comparing the results with already existing solutions.
KEYWORDS: astronomical models, computational astrophysics, interstellar gas, stellar winds, hydrodynamics, hydrogen clouds, oort cloud, photoionization, supernova remnants
PERSOKEY:supershell, ,
CODE: wolff87