Possible Early Linear Acceleration of Proto-neutron Stars via Asymmetric Neutrino Emission in Core-collapse Supernovae

Journal: The Astrophysical Journal Letters

Published: 2019-07-31

DOI: 10.3847/2041-8213/ab30ca

Affiliations: 4

Authors: 3

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Research Highlight

Neutrinos could give neutron stars a kick start in life

© Stocktrek Images/Getty

© Stocktrek Images/Getty

A simulation of a supernova undergoing a core-collapse explosion provides support for an explosion mechanism in which elementary particles known as neutrinos play a big role.

Core-collapse supernovae are the death throes of massive stars, and they give birth to neutron stars or black holes. A proto-neutron star forms at the center of the explosion. Despite stars being spherical, the proto-neutron star receives a ‘kick’ in one direction. The ‘foot’ behind this kick has been keenly debated by astrophysicists.

Now, a team led by a researcher at Waseda University in Japan has performed a simulation of a core-collapse supernova that includes neutrino motion and proper motions of the proto-neutron star. They found that asymmetry associated with neutrinos may play a role in generating the neutron star kick, although further work is needed to firmly establish this.

Supported content

  1. The Astrophysical Journal Letters 880, L28 (2019). doi: 10.3847/2041-8213/ab30ca
Institutions Share
Department of Astrophysical Sciences, Princeton University, United States of America (USA) 0.33
National Institute of Technology, Numazu College, Japan 0.33
Waseda Research Institute for Science and Engineering (WISE), Waseda University, Japan 0.17
Faculty of Science and Engineering, Waseda University, Japan 0.17