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Simultaneous measurement of mass and radius with high precision is essential to unravel the equation of state of matter at the centre of neutron stars. Measurement of massive pulsars indicates that the equation of state has to be stiff at…

太阳与恒星天体物理 · 物理学 2024-07-19 Asim Kumar Saha , Ritam Mallick

The observation of gravitational waves from an asymmetric binary opens the possibility for heavy neutron stars, but these pose challenges to models of the neutron star equation of state. We construct heavy neutron stars by introducing…

高能天体物理现象 · 物理学 2021-01-04 Hung Tan , Jacquelyn Noronha-Hostler , Nico Yunes

With the increasing sensitivity of gravitational-wave detectors, we expect to observe multiple binary neutron-star systems through gravitational waves in the near future. The combined analysis of these gravitational-wave signals offers the…

高能天体物理现象 · 物理学 2022-03-11 Nina Kunert , Peter T. H. Pang , Ingo Tews , Michael W. Coughlin , Tim Dietrich

Gravitational-wave observations of binary neutron star coalescences constrain the neutron-star equation of state by enabling measurement of the tidal deformation of each neutron star. This deformation is determined by the tidal…

高能天体物理现象 · 物理学 2020-11-18 Francisco Hernandez Vivanco , Rory Smith , Eric Thrane , Paul D. Lasky

We demonstrate by a large set of merger simulations for symmetric binary neutron stars (NSs) that there is a tight correlation between the frequency peak of the postmerger gravitational-wave (GW) emission and the physical properties of the…

太阳与恒星天体物理 · 物理学 2015-05-28 A. Bauswein , H. -Th. Janka

A direct detection of black hole formation in neutron star mergers would provide invaluable information about matter in neutron star cores and finite temperature effects on the nuclear equation of state. We study black hole formation in…

广义相对论与量子宇宙学 · 物理学 2024-07-03 Arnab Dhani , David Radice , Jan Schütte-Engel , Susan Gardner , Bangalore Sathyaprakash , Domenico Logoteta , Albino Perego , Rahul Kashyap

Gravitational-wave astronomy shows great promise in determining nuclear physics in a regime not accessible to terrestrial experiments. We introduce physics-informed priors constrained by nuclear theory and perturbative Quantum…

高能天体物理现象 · 物理学 2025-05-01 Spencer J. Magnall , Christian Ecker , Luciano Rezzolla , Paul D. Lasky , Simon R. Goode

Coalescing neutron star (NS)-black hole (BH) binaries are promising sources of gravitational-waves (GWs) to be detected within the next few years by current GW observatories. If the NS is tidally disrupted outside the BH innermost stable…

高能天体物理现象 · 物理学 2020-03-03 Stefano Ascenzi , Nicola De Lillo , Carl-Johan Haster , Frank Ohme , Francesco Pannarale

The equation of state dependence of neutron star's astrophysical features modeling is key to our understanding of dense matter. However, there exists a series of almost equation-of-state independent relations reported in the literature,…

高能天体物理现象 · 物理学 2024-05-20 Lami Suleiman , Jocelyn Read

The remnant star of a neutron star merger is an anticipated loud source of kiloHertz gravitational waves that conveys unique information on the equation of state of hot matter at extreme densities. Observations of such signals are hampered…

广义相对论与量子宇宙学 · 物理学 2020-01-22 Matteo Breschi , Sebastiano Bernuzzi , Francesco Zappa , Michalis Agathos , Albino Perego , David Radice , Alessandro Nagar

The Neutron Star Interior Composition Explorer (NICER) recently measured the mass and equatorial radius of the isolated neutron star PSR J0030+0451. We use these measurements to infer the moment of inertia, the quadrupole moment, and the…

广义相对论与量子宇宙学 · 物理学 2021-05-06 Hector O. Silva , A. Miguel Holgado , Alejandro Cárdenas-Avendaño , Nicolás Yunes

We summarize our current knowledge of neutron star masses and radii. Recent instrumentation and computational advances have resulted in a rapid increase in the discovery rate and precise timing of radio pulsars in binaries in the last few…

高能天体物理现象 · 物理学 2016-10-05 Feryal Ozel , Paulo Freire

Gravitational-wave measurements of the tidal deformability in neutron-star binary coalescences can be used to infer the still unknown equation of state (EoS) of dense matter above the nuclear saturation density. By employing a…

广义相对论与量子宇宙学 · 物理学 2022-03-23 Costantino Pacilio , Andrea Maselli , Margherita Fasano , Paolo Pani

Gravitational-wave (GW) observations of neutron star-black hole (NSBH) mergers are sensitive to the nuclear equation of state (EOS). We present a new methodology for EOS inference with non-parametric Gaussian process (GP) priors, enabling…

广义相对论与量子宇宙学 · 物理学 2024-07-10 Nikhil Sarin , Hiranya V. Peiris , Daniel J. Mortlock , Justin Alsing , Samaya M. Nissanke , Stephen M. Feeney

Detection of gravitational waves from the inspiral phase of binary neutron star coalescence will allow us to measure the effects of the tidal coupling in such systems. These effects will be measurable using 3rd generation gravitational wave…

广义相对论与量子宇宙学 · 物理学 2015-05-28 Chris Messenger , Jocelyn Read

The joint observation of the gravitational-wave and electromagnetic signal from the binary neutron-star merger GW170817 allowed for a new independent measurement of the Hubble constant $H_0$, albeit with an uncertainty of about 15\% at…

广义相对论与量子宇宙学 · 物理学 2021-05-11 Juan Calderón Bustillo , Samson H. W. Leong , Tim Dietrich , Paul D. Lasky

We calculate neutron star's moment of inertia and deformabilities using various microscopic equations of state for nuclear and hybrid star configurations. Correlations between the various observables are examined and we confirm several…

高能天体物理现象 · 物理学 2019-01-28 J. -B. Wei , A. Figura , G. F. Burgio , H. Chen , H. -J. Schulze

The precise measurement of neutron star (NS) spins can provide important insight into the formation and evolution of compact binaries containing NS. While traditional methods of NS spin measurement rely on pulsar observations, gravitational…

高能天体物理现象 · 物理学 2024-08-01 Ish Gupta

Neutron star properties depend on both nuclear physics and astrophysical processes, and thus observations of neutron stars offer constraints on both large-scale astrophysics and the behavior of cold, dense matter. In this study, we use…

高能天体物理现象 · 物理学 2025-10-29 Jacob Golomb , Isaac Legred , Katerina Chatziioannou , Philippe Landry

We examine the development and detectability of the $m=1$ instability in the remnant of binary neutron star mergers. The detection of the gravitational mode associated with the $m=1$ degree of freedom could potentially reveal details of the…

广义相对论与量子宇宙学 · 物理学 2016-08-22 Luis Lehner , Steven L. Liebling , Carlos Palenzuela , Patrick Motl