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
Princeton University, United States of America (USA) 0.33
National Institute of Technology, Numazu College, Japan 0.33
Waseda University, Japan 0.33