[Okc-wp4] EO meeting Thu Nov 07 @ 13:15 KTH meeting room

[Andre Schneider]

Dear colleagues,


our next EO meeting will take place this Thursday, Nov 07 at 13:15.
The meeting will take place at the KTH meeting room on the 5th floor of the AlbaNova University Centre.


Speaker: Davide Gizze


Title: Modeling neutrino transport in binary neutron star mergers


Abstract:
Neutrinos, copiously produced in the hot environment of merging neutron stars, play an important role in the dynamics of a merger. In particular, neutrino absorption drives mass ejection, the so called neutrino-driven winds. Moreover, neutrinos reprocess the electron fraction in the ejecta from a neutron star merger, with consequent impact on the nucleosynthesis of the r-process nuclei. The electron fraction in neutrino-driven winds is such that only a weak r-process occurs. The detection of a bright blue kilonova from GW170817 was a clear signature of the presence of weak interactions in mergers. Modeling neutrino-driven winds is therefore crucial for future kilonovae detections. In this talk, I will first introduce the
challenging topic of neutrino transport. I will then focus on an approximate neutrino transport approach called Advanced Spectral Leakage (ASL). The ASL was initially designed for neutrino transport in the context of core-collapse supernovae simulations. I will describe how we extended the original implementation of the ASL to model neutrino-driven winds in neutron star merger simulations, together with numerical tests performed over snapshots.



See you there!





---------------------------------

André da Silva Schneider

Department of Astronomy

Stockholm University


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