The environment of core collapse supernovae is probed by their radio and
X-ray emission. The various supernova types
(IIP, IIL, IIb, IIn, Ib/c) have characteristic radio properties; the
differences can be attributed to the mass loss density and the velocity of
the interaction region. The Type Ic SN 1998bw, associated with GRB
980425, fits into this scheme, although with a high velocity. The
afterglows of long GRBs are more difficult to reconcile with the expected
mass loss environment.
To begin viewing slides, click on the first slide below. (Or, view as pdf.)