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arXiv · 2301.06515

Gravitational Waves from a Core g-Mode in Supernovae as Probes of the High-Density Equation of State

Pia Jakobus·Bernhard Müller·Alexander Heger·Shuai Zha·Jade Powell·Anton Motornenko·Jan Steinheimer·Horst Stoecker
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Abstract

Using relativistic supernova simulations of massive progenitor stars with a quark-hadron equation of state (EoS) and a purely hadronic EoS, we identify a distinctive feature in the gravitational-wave signal that originates from a buoyancy-driven mode (g-mode) below the proto-neutron star convection zone. The mode frequency lies in the range $200\lesssim f\lesssim 800\,\text{Hz}$ and decreases with time. As the mode lives in the core of the proto-neutron star, its frequency and power are highly sensitive to the EoS, in particular the sound speed around twice saturation density.

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Pia Jakobus, Bernhard Müller, Alexander Heger, Shuai Zha, Jade Powell, Anton Motornenko, Jan Steinheimer, Horst Stoecker. 2023-01-16. Gravitational Waves from a Core g-Mode in Supernovae as Probes of the High-Density Equation of State. https://arxiv.org/abs/2301.06515

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