The photoevaporation of interstellar clouds. I - Radiation-driven implosion
F. Bertoldi;
ApJ, 1989, 346, 735
ABSTRACT:An approximate analytical solution is developed for the evolution of an interstellar
neutral cloud exposed to the ionizing radiation of a newly formed star.
The
structure of a steady photoevaporation gas flow off a spherical ionization front
is derived even for cases where the ionization front cannot be considered
thin, and the downstream flow is not in ionization and thermal
equilibrium.
Under a wide range of conditions, the ionization front is approximately
D-critical, and the ionized gas expands supersonically into the intercloud
medium.
The ionization front typically drives a strong shock into the initial
cloud.
KEYWORDS: h ii regions, interstellar matter, molecular clouds, computational astrophysics, evaporation, ionized gases, lyman alpha radiation, radiation distribution, shock fronts, star formation
PERSOKEY:region hii, ,
CODE: bertoldi89