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Equation-of-State effects on Gravitational Waves in Core-Collapse Supernovae

Published online by Cambridge University Press:  27 February 2023

Oliver Eggenberger Andersen Open the ORCID record for Oliver Eggenberger Andersen [Opens in a new window] ,
Shuai Zha ,
André da Silva Schneider ,
Aurore Betranhandy ,
Sean M. Couch  and
Evan P. O’Connor
Oliver Eggenberger Andersen
Affiliation:
The Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden
Shuai Zha
Affiliation:
The Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden
André da Silva Schneider
Affiliation:
The Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden
Aurore Betranhandy
Affiliation:
The Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden
Sean M. Couch
Affiliation:
Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Department of Computational Mathematics, Science, and Engineering, Michigan State University, East Lansing, MI 48824, USA Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48824, USA
Evan P. O’Connor
Affiliation:
The Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden
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Abstract

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The nuclear equation-of-state (EOS) describing newly formed proto-neutron stars (PNSs) in core-collapse supernovae (CCSNe) is yet uncertain, and varying its prescription affects multimessenger signatures in CCSN simulations. Focusing on the gravitational wave (GW) signal, we demonstrate the effect of varying parameter values in the EOS. We conclude that an especially important parameter is the effective mass of nucleons which affect thermal properties and subsequently the PNS compactness, regulating the GW signal in both amplitude and frequency. By radially decomposing the GW emission, we show where in the PNS the GWs originate from.

Keywords

supernovae: generalgravitational wavesequation of stateneutrinos
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S363: Neutron Star Astrophysics at the Crossroads: Magnetars and the Multimessenger Revolution , June 2020 , pp. 255 - 258
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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