Evaluating approximate flavor instability metrics in neutron star mergers
Evaluating approximate flavor instability metrics in neutron star mergers
复制标题
评估中子星合并中的近似风味不稳定性指标
DOI:
10.1103/physrevd.106.083005
复制
发表时间:
2022
影响因子:
5
通讯作者:
Richers, Sherwood
中科院分区:
文献类型:
--
作者:
Richers, Sherwood
Neutrinos can rapidly change flavor in the inner dense regions of core-collapse supernovae and neutron star mergers due to the neutrino fast flavor instability. If the amount of flavor transformation is significant, the fast flavor instability (FFI) could significantly affect how supernovae explode and how supernovae and mergers enrich the universe with heavy elements. Since many state of the art supernova and merger simulations rely on neutrino transport algorithms based on angular moments of the radiation field, there is incomplete information with which to determine if the distributions are unstable to the FFI. In this work we test the performance of several proposed moment-based instability tests in the literature. We perform time-independent general relativistic neutrino transport on a snapshot of a 3D neutron star merger simulation to generate reasonable neutrino distributions and check where each of these criteria correctly predict instability. In addition, we offer a new “maximum entropy” instability test that is somewhat more complex, but offers more detailed (though still approximate) estimates of electron lepton number crossing width and depth. We find that this maximum entropy test and the resonant trajectory test are particularly accurate at predicting instability in this snapshot, though all tests predict instability where significant flavor transformation is most likely.
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影响因子:
5
作者:
S. Richers;D. Willcox;N. Ford
通讯作者:
S. Richers;D. Willcox;N. Ford
DOI:
10.1007/s41115-020-00010-8
发表时间:
2020-10
期刊:
Living Reviews in Computational Astrophysics
影响因子:
--
作者:
A. Mezzacappa;E. Endeve;O. E. Bronson Messer;S. Bruenn
通讯作者:
A. Mezzacappa;E. Endeve;O. E. Bronson Messer;S. Bruenn
影响因子:
5
作者:
B. Dasgupta;A. Mirizzi;M. Sen
通讯作者:
B. Dasgupta;A. Mirizzi;M. Sen
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
E. O’Connor
通讯作者:
E. O’Connor
DOI:
10.1086/174640
发表时间:
1994
期刊:
The Astrophysical Journal
影响因子:
--
作者:
J. Černohorský;S. Bludman
通讯作者:
S. Bludman