Insight into star formation recycling

Description
The evolution of galaxies is set by a complex mechanism of recycling between the stellar and the gaseous components, but the picture is even more complicated, because galaxies are not isolated system, they are preferentially found in cluster. For that cases the environment through hydrodynamical and gravitational effects, can drastically modify the gas distribution within galaxies.
In this talk I will show the results of our  investigation about the environment and how it affects the various components of the interstellar medium. To quantify this effects we considered a sample of spiral galaxies in the Virgo cluster, because at the Virgo distance (about 17 Mpc) we can resolve spatially the galaxy and investigate radial variations along the disks.
We found very interesting correlations between gas and dust, and we also found a lot of open questions.
All this should imply that may be we are missing something important.

(OSSERVATORIO ASTROFISICO VIA S.SOFIA 78 -CATANIA)
Organised by Dr.Antonio Frasca