Overabundance of Calcium in the young SNR RX J0852$-$4622: evidence of over-production of ${}^{44}$Ti

Hiroshi Tsunemi, Emi Miyata, Bernd Aschenbach +2

Recently, COMPTEL has detected $\gamma$-rays of 1157 keV from ${}^{44}$Ti in the direction of the SNR RX J0852$-$4622 (Iyudin et al. 1998). Since ${}^{44}$Ti is a product of explosive nucle…