Linking 44Ti explosive nucleosynthesis to the dynamics of core-collapse supernovae

Details Linking 44Ti explosive nucleosynthesis to the dynamics of core-collapse supernovae Linking 44Ti explosive nucleosynthesis to the dynamics of core-collapse supernovae

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008newar..52..401m&link_type=abstract

New Astronomy Reviews, Volume 52, Issue 7-10, p. 401-404.

Astronomy and Astrophysics

Astronomy

2

26.20, 26.30

Scientific paper

We have searched for the three decay lines of the 44Ti in Cassiopeia A with the spectrometer SPI on-board INTEGRAL. The lines at 78.4 and 1157.0 keV have been detected with a flux of (2.1 ± 0.7) × 10-5 ph cm-2 s-1, consistent with all previous measurements combined. The spectral capabilities of SPI indicate that the 44Ti ejecta expands at about 430 km s-1 and moves away from the observer at about 500 km s-1. Such a small expansion velocity together with the 44Ti yield of the event are consistent with a spherical explosion but an asymmetric explosion due for instance to prolate neutrino emission could not be definitely excluded.

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