Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-11-12
Astrophys.J.745:197,2012
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
24 pages, 9 figures, accepted for publication in ApJ
Scientific paper
10.1088/0004-637X/745/2/197
We investigate the emergence of hyperons in black-hole-forming failed supernovae, which are caused by the dynamical collapse of nonrotating massive stars. We perform neutrino-radiation hydrodynamical simulations in general relativity adopting realistic hyperonic equation-of-state (EOS). Attractive and repulsive cases are examined for the potential of \Sigma\ hyperons. Since hyperons soften the EOS, they shorten the time interval from the bounce to black hole formation, which corresponds to the duration of neutrino emission. This effect is larger for the attractive case than the repulsive case because \Sigma\ hyperons appear more easily. In addition, we investigate the impacts of pions to find that they also promotes the recollapse towards the black hole formation.
Furusawa Shun
Nakazato Ken'ichiro
Ohnishi Akira
Sumiyoshi Kohsuke
Suzuki Hideyuki
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