Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 67: Nuclear Astrophysics VI
HK 67.4: Vortrag
Freitag, 18. März 2016, 15:00–15:15, S1/01 A02
Short gamma ray bursts triggered by neutrino-antineutrino annihilation⋆ — •Hannah Yasin1, Albino Perego1, and Almudena Arcones1,2 — 1Institut für Kernphysik, TU Darmstadt, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
Gamma ray bursts (GRB) are one of the most energetic events in the universe. Neutron star mergers are the most favourable candidate for the subclass of GRBs that last less than two seconds. It has been suggested that the annihilation of neutrino-antineutrino pairs emitted by the hot and dense merger remnant could be enough to launch a relativistic jet, producing such a burst [1]. We calculate the energy deposition by neutrino-antineutrino annihilation based on the results of a Newtonian simulation of the aftermath of a binary neutron star merger [2]. In addition, we investigate the necessary requirements for launching a GRB and compare with our numerical results.
[1] D. Eichler, M. Livio, T. Piran, and D. N. Schramm, Nature 340 (1989) 126.
[2] A. Perego, S. Rosswog, R. M. Cabezon, O. Korobkin, R. Käppeli, A. Arcones, and M. Liebendörfer, MNRAS 443 (2014) 3134.
⋆ Supported by Helmholtz-University Young Investigator grant No. VH-NG-825.