If instead the wind velocity is not high enough, the gravitational pull eventually prevails and a galactic fountain
is formed instead.
While some of their properties suggest that they could account for the infalling material we are talking about, others indicate that they are related to "galactic fountain
Instead of blocking diffuse X-ray emissions, the Draco cloud may just happen to lie in front of a "galactic fountain
" -- a hot, X-ray-emitting gas spewing into a small portion of the Milky Way's halo.
Their ejecta blast through the interstellar medium, heating it and giving rise to phenomena such as galactic fountains
. Shock waves from supernovae may also trigger vigorous bursts of star formation by compressing dense molecular clouds.
This instrument is most sensitive to diffuse ionized gas at temperatures of several hundred thousand degrees, and so it has the potential to map galactic fountains
if they exist.