Recent content by dnam

The other main source of gas heating is supernovae. This is a feedback effect. When gas density increases, it cools (metal lines, radiative cooling) allowing stars to form. Collapse is then halted by SN blasting heated gas back into the cluster environment (but still bound to the halo)...

Hi, I don't know if this is too late for you, but here's the outline of what you need to do: 1. The photometric data is stored as "PhotoObj" in the SDSS, spectroscopic data is stored in SpecObjAll (check the schema) 2. If you have spectroscopic data, for each (galaxy?) (star?) you should...

S0 galaxies are essentially the transition point in galaxy evolution. These galaxies are found in cluster environments where they are subject to a variety of mechanisms that serve to remove the cold gas reservoir of the galaxy. These mechanisms (strangulation, harassment, tidal stripping...