Gravitational-Wave and X-ray Probes of the Neutron Star Equation of State
arXiv:2202.04117 · doi:10.1038/s42254-022-00420-y
Abstract
Neutron stars are a remarkable marriage of Einstein's theory of general relativity with nuclear physics. Their interiors harbor extreme matter that cannot be probed in the laboratory. At such high densities and pressures, their cores may consist predominantly of exotic matter such as free quarks or hyperons. Gravitational wave observations from the Laser Interferometer Gravitational-wave Observatory (LIGO) and from other interferometers, and X-ray observations from the Neutron Star Interior Composition Explorer (NICER), are beginning to pierce through the veil. These observations provide information about neutron star cores, and therefore, about the physics that makes such objects possible. In this review, we discuss what we have learned about the physics of neutron stars from gravitational wave and X-ray observations. We focus on what has been observed with certainty and what should be observable in the near future, with an eye out for the physics that these new observations will teach us.
Published in Nature Reviews Physics (2022)
References in corpus (28)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Shapiro delay measurement of a two solar mass neutron star
- A Massive Pulsar in a Compact Relativistic Binary
- Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
- GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
- The order of the quantum chromodynamics transition predicted by the standard model of particle physics
- PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
- A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
- Tidal Love numbers of neutron stars
- Computational complexity and fundamental limitations to fermionic quantum Monte Carlo simulations
- Constraining neutron star tidal Love numbers with gravitational wave detectors
- A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
- Constraints on a phenomenologically parameterized neutron-star equation of state
- Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817
- Relativistic theory of tidal Love numbers
- Modeling GW170817 based on numerical relativity and its implications
- Kilonovae
- Neutron matter at next-to-next-to-next-to-leading order in chiral effective field theory
- Models of Pulsar Glitches
- Neutron star tidal deformability and equation of state constraints
- Spectral Representations of Neutron-Star Equations of State
- Pulsar Glitches: The Crust may be Enough
- Cooling of Neutron Stars. Hadronic Model
- Constraining the equation of state of supra-nuclear dense matter from XMM-Newton observations of neutron stars in globular clusters
- Extreme Matter meets Extreme Gravity: Ultra-heavy neutron stars with crossovers and first-order phase transitions
- Studying the onset of deconfinement with multi-messenger astronomy of neutron stars
- Impact of quark deconfinement in neutron star mergers and hybrid star mergers
- Probing Fundamental Physics with Gravitational Waves
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- Searches for Continuous-Wave Gravitational Radiation
- Exploring QCD matter in extreme conditions with Machine Learning
- Dark Matter or Regular Matter in Neutron Stars? How to tell the difference from the coalescence of compact objects
- Reconstructing the neutron star equation of state from observational data via automatic differentiation
- Physics-Driven Learning for Inverse Problems in Quantum Chromodynamics
- Systematic biases due to waveform mismodeling in parametrized post-Einsteinian tests of general relativity: The impact of neglecting spin precession and higher modes
- PSR J1231-1411 revisited: Pulse Profile Analysis of X-ray Observation
- Breaking bad degeneracies with Love relations: Improving gravitational-wave measurements through universal relations
- Implications of supermassive neutron stars for the form of the equation of state of hybrid stars
- Universal Relations for rapidly rotating neutron stars using supervised machine-learning techniques
- Towards constraining QCD phase transitions in neutron star interiors: Bayesian Inference with TOV linear response analysis
- Slowly rotating Tolman VII solution
- Colloquium: Multimessenger astronomy with continuous gravitational waves and future detectors
- Anisotropic pressure effect on central EOS of PSR J0740+6620 in the light of dimensionless TOV equation
- New solution to the hyperon puzzle of neutron stars: Quantum many-body effects
- Neutron Stars in Causal Scalar-Tensor Theories
- Precise constraint on properties of neutron stars through new universal relations and astronomical observations
- Multiwavelength identification of millisecond pulsar candidates in the Galactic bulge
- GFH-v2 Pipeline for Searches of Long-Transient Gravitational Waves from Newborn Magnetars