Interchange processes of the interstellar medium - Mass circulation between the Galactic disk and halo
F. Li, S. Ikeuchi;
PASJ, 1989, 41, 221
ABSTRACT:Interchange processes among the three phases of the interstellar medium (cold clouds, warm ionized gas, and hot tenuous gas), including mass
circulation between the Galactic disk and halo regulated by supernova remnants and
superbubbles, are studied.
The time variation of each component of the interstellar
medium is calculated and a steady state is obtained for the connected Galactic
disk-halo system.
It is found that the mass circulation rate is about 1.6 solar
masses/yr between the disk and halo for usual parameters.
The high supernova
rate case is studied as a trial model corresponding to young galaxies or
starburst galaxies.
In this case, the halo works as a reservoir of mass, and the
time variation of the interstellar medium shows a periodicity.
This
behavior indicates recurrent bursts of star formation.
KEYWORDS: astronomical models, galactic evolution, galactic structure, interstellar matter, milky way galaxy, star formation rate, halos, starburst galaxies, supernova remnants, supernovae, temporal distribution
PERSOKEY:supershell, ,
CODE: li89