Deriving Neutron Star Equation of State from AdS/QCD
arXiv:2403.20240 · doi:10.1016/j.rinp.2024.107893
Abstract
Neutron stars are among the main targets for gravitational wave observatories, however, their equation of state is still not well established. Mainly phenomenological models with many parameters are widely used by far, while theoretical models are not so practical. In arXiv:1902.08477, a theoretical equation of state with only one parameter is derived from Witten-Sakai-Sugimoto model, as an application of AdS/QCD, where pointlike instanton case is taken into consideration. When the tidal deformability constraint from gravitational wave event is satisfied, the maximum mass is about 1.7 solar masses. Now we upgrade this model to instanton gas, with one more variable, the instanton width. This is not naively a free parameter, but a function of the chemical potential. Thus we end up with a more complicated and accurate model, but still with only one adjustable parameter. In this case, we find the maximum mass becomes 1.85 solar masses. This is an encouraging result, as a theoretically derived model.
arXiv comment10 pages, 8 figures; v2: published version, with parameter sensitivity analysis added in Appendix C
References in corpus (35)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Multi-messenger Observations of a Binary Neutron Star Merger
- The equation of state for nucleon matter and neutron star structure
- GW190425: Observation of a Compact Binary Coalescence with Total Mass
- Low energy hadron physics in holographic QCD
- A unified equation of state of dense matter and neutron star structure
- Properties of the binary neutron star merger GW170817
- Adding flavor to AdS/CFT
- The Nuclear Equation of State and Neutron Star Masses
- Physics, Astrophysics and Cosmology with Gravitational Waves
- More on a holographic dual of QCD
- The String Dual of a Confining Four-Dimensional Gauge Theory
- Tidal Love Numbers of Neutron and Self-Bound Quark Stars
- Holographic Nuclear Physics
- The Multi-Messenger Matrix: the Future of Neutron Star Merger Constraints on the Nuclear Equation of State
- Dark stars: gravitational and electromagnetic observables
- Holographic quark matter and neutron stars
- From holography towards real-world nuclear matter
- Breaking the sound barrier in AdS/CFT
- Probing QCD critical point and induced gravitational wave by black hole physics
- Magnetic properties of dense holographic QCD
- Holographic compact stars meet gravitational wave constraints
- Biases for neutron-star mass, radius and distance measurements from Eddington-limited X-ray bursts
- Holographic baryonic matter in a background magnetic field
- Holographic cold nuclear matter as dilute instanton gas
- Phase structure and critical phenomena in 2-flavor QCD by holography
- GW170817 and GW190425 as Hybrid Stars of Dark and Nuclear Matters
- Compact Star of Holographic Nuclear Matter and GW170817
- Massive neutron stars with holographic multiquark cores
- Dark Stars and Gravitational Waves: Topical Review
- Constraint on hybrid stars with gravitational wave events
- Neutron stars in the Witten-Sakai-Sugimoto model
- Slowly Rotating Neutron Star with Holographic Multiquark Core: I-Love-Q Relations
- Quark stars in - holographic model
- Exact and Efficient Numerical approaches to MIT Bag Model