Medium modifications for light and heavy nuclear clusters in simulations of core collapse supernovae — Impact on equation of state and weak interactions. (arXiv:2008.13608v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Fischer_T/0/1/0/all/0/1">Tobias Fischer</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Typel_S/0/1/0/all/0/1">Stefan Typel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ropke_G/0/1/0/all/0/1">Gerd Röpke</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bastian_N/0/1/0/all/0/1">Niels-Uwe F. Bastian</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Martinez_Pinedo_G/0/1/0/all/0/1">Gabriel Martínez-Pinedo</a>
The present article investigates the role of heavy nuclear clusters and
weakly bound light nuclear clusters based on a newly developed equation of
state for core collapse supernova studies. A novel approach is brought forward
for the description of nuclear clusters, taking into account the quasiparticle
approach and continuum correlations. It demonstrates that the commonly employed
nuclear statistical equilibrium approach, based on non-interacting particles,
for the description of light and heavy clusters becomes invalid for warm
nuclear matter near the saturation density. This has important consequences for
studies of core collapse supernovae. To this end, we implement this nuclear
equation of state provided for arbitrary temperature, baryon density and
isospin asymmetry, to spherically symmetric core collapse supernova simulations
in order to study the impact on the dynamics as well as on the neutrino
emission. For the inclusion of a set of weak processes involving light clusters
the rate expressions are derived, including medium modifications at the mean
field level. A substantial impact from the inclusion of a variety of weak
reactions involving light clusters on the post bounce dynamics nor on the
neutrino emission could not be found.
The present article investigates the role of heavy nuclear clusters and
weakly bound light nuclear clusters based on a newly developed equation of
state for core collapse supernova studies. A novel approach is brought forward
for the description of nuclear clusters, taking into account the quasiparticle
approach and continuum correlations. It demonstrates that the commonly employed
nuclear statistical equilibrium approach, based on non-interacting particles,
for the description of light and heavy clusters becomes invalid for warm
nuclear matter near the saturation density. This has important consequences for
studies of core collapse supernovae. To this end, we implement this nuclear
equation of state provided for arbitrary temperature, baryon density and
isospin asymmetry, to spherically symmetric core collapse supernova simulations
in order to study the impact on the dynamics as well as on the neutrino
emission. For the inclusion of a set of weak processes involving light clusters
the rate expressions are derived, including medium modifications at the mean
field level. A substantial impact from the inclusion of a variety of weak
reactions involving light clusters on the post bounce dynamics nor on the
neutrino emission could not be found.
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