From: prme (prme@kromos.jpl.nasa.gov)
Date: Tue Jan 24 2006 - 13:45:18 PST
I think this is dangerous terrain: Mark Sullivan's poster on SNe rates
vs. host properties talks about two opos of Ia's, one associated
with active SF galaxies, the other with quiescent E's. The dust free
Ia's are more likely to be those associated with the quiescent
progenitors, whereas the interaction enhanced rates are likely
associated with SF and dust. Dust in E's is also associated with
optical emission, and emission is associated with radio loud galaxies
as has been said. I think we should *not* claim that we expect
a higher SNIa rate in cluster E's than field E's because
a) I think this is not the case
b) it may lead to questions about the dust-free claim, which is
fundamental to the proposal.
Peter Eisenhardt
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