15–19 Jun 2015
Hotel Mercure Buda, Budapest
Europe/Budapest timezone
Have a safe trip back, please send us your photos!

Neutrinos and neutrino-driven winds in the aftermaths of binary neutron star mergers.

15 Jun 2015, 17:00
25m
Conference Room A (Hotel Mercure Buda)

Conference Room A

Hotel Mercure Buda

Speaker

Albino Perego (TU-Darmstadt)

Description

Binary neutron star mergers are among the most extreme events happening in the Universe. These powerful events are expected to release large amounts of energy in form of neutrinos, gravitational waves and electromagnetic radiation, together with the ejection of a small fraction of their original mass. In particular, they are expected to be sites for r-process nucleosynthesis, as well as very promising candidates to power short-hard gamma-ray bursts (GRBs) and the newly discovered kilo/macro-novae. Despite the central role played by neutrinos in this scenario, their role is still unclear and more investigations are required. In this talk, I will present results from 3D simulation of the aftermath of a binary neutron star merger. The dynamics of the disc will be investigated, as well as the neutrino emission coming from the central object and the innermost part of the accreting disc. The interaction between the disc and the neutrino radiation produces a neutrino-driven wind on a timescale of a few tens of milliseconds after the merger. Inside the wind, the electron fraction of the matter (initially extremely neutron rich) is reset by neutrino absorption. The properties of the related ejecta will be explored, with a special emphasis on the nucleosynthesis yields and on their dependences on microphysics inputs. Implication of the wind in terms for the central engine of short GRBs will also be discussed.

Primary author

Albino Perego (TU-Darmstadt)

Presentation materials