Galactic Supernova Rate from COMPTEL 44Ti Gamma-line
Observations
L.-S. The, M. D. Leising, D. H. Hartmann
R. Diehl, A. Iyudin
U. Oberlack
Abstract
44Ti is one of the few radioactive nuclei produced in SNe events
quite abundantly. Because 44Ti's short life time is comparable with
the typical time between SNe events in a galaxy, the 44Ti distribution
in the galaxy therefore is a good diagnostic tool for probing recent
SNe events in the Galaxy. We present our analysis of the COMPTEL's Cycle
1-6 44Ti gamma-line map compared with Monte Carlo simulations of
SNe events in the Galaxy. Using standard Galactic SNe distribution models
and theoretical SNe 44Ti production, we constrain Galactic supernova
rates with the COMPTEL data. We compare the results with the rates inferred
from the historical supernovae in the last two millenniums.
File translated from TEX by TTH, version 2.32.
On 16 Jul 1999, 09:19.