Resumen

OUYED, A.; OUYED, R.; LEAHY, D.  y  JAIKUMAR, P.. A spallation model for ⁴⁴TI production in core collapse supernovae. Rev. mex. astron. astrofis [online]. 2014, vol.50, n.1, pp.77-85. ISSN 0185-1101.

Current core collapse supernovae (cc-SNe) models predict overproduction of ⁴⁴Ti compared to observations. We present a model for an alternative channel where a cc-SN explosion is followed by a neutron star detonation (QuarkNovaor QN), resulting in a spallation reaction of SN ejecta that produces ⁴⁴Ti. We can achieve a ⁴⁴Ti production of ~ 10^-4 M⊙ with our model under the right time delay between the QN and the SN. Our model also produces unique signals not found in standard, cc-SN nucleosynthesis models. Some of these unique signals include a significantly large production of ⁷Be and ²²Na. We discuss some of these signals by analyzing the late time light curve and gamma spectroscopy of our model.

Palabras llave : nuclear reactions; nucleosynthesis; abundances; stars [pre-main sequence]; supernovae [general]; supernovae [individual (SN1987A, Cassiopeia A)].