1
|
Jakobus P, Müller B, Heger A, Zha S, Powell J, Motornenko A, Steinheimer J, Stöcker H. Gravitational Waves from a Core g Mode in Supernovae as Probes of the High-Density Equation of State. PHYSICAL REVIEW LETTERS 2023; 131:191201. [PMID: 38000402 DOI: 10.1103/physrevlett.131.191201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 04/18/2023] [Accepted: 09/29/2023] [Indexed: 11/26/2023]
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≲f≲800 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.
Collapse
Affiliation(s)
- Pia Jakobus
- School of Physics and Astronomy, Monash University, Clayton, VIC 3800, Australia
| | - Bernhard Müller
- School of Physics and Astronomy, Monash University, Clayton, VIC 3800, Australia
| | - Alexander Heger
- School of Physics and Astronomy, Monash University, Clayton, VIC 3800, Australia
| | - Shuai Zha
- Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming 650216, China; Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650216, China; and International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, China
| | - Jade Powell
- Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Anton Motornenko
- Frankfurt Institute for Advanced Studies, Giersch Science Center, Frankfurt am Main, Germany
| | - Jan Steinheimer
- Frankfurt Institute for Advanced Studies, Giersch Science Center, Frankfurt am Main, Germany
| | - Horst Stöcker
- Frankfurt Institute for Advanced Studies, Giersch Science Center, Frankfurt am Main, Germany
| |
Collapse
|