Magnetically supramassive neutron stars
arXiv:2109.08276 · doi:10.1103/PhysRevD.105.L061302
Abstract
It is commonly believed that neutron stars exceeding the maximum mass limit for stability could be formed in the aftermath of binary neutron star mergers, enjoying a short life of metastability before losing centrifugal support and collapsing to a black hole. It is suggested here that a similar scenario could take place when the remnant's excess mass is supported by an ultra-strong $(\gtrsim 10^{17}\,\mbox{G})$ magnetic field that could be generated during, and shortly after, coalescence. We show that such 'magnetically supramassive' neutron stars could stave off collapse and survive for a few years before their magnetic energy is sufficiently dissipated due to ambipolar diffusion. In addition, we speculate on multi-messenger signatures of such objects and discuss the robustness of our results against limitations placed by neutron superfluidity and magneto-thermal evolution.
arXiv comment5 pages, 3 figures. Accepted for publication as a Letter in Phys. Rev. D
References in corpus (26)
- Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
- The equation of state for nucleon matter and neutron star structure
- GW170817: Measurements of Neutron Star Radii and Equation of State
- Rotating Stars in Relativity
- Signatures of magnetar central engines in short GRB lightcurves
- Black Holes
- Rapid Cooling of the Neutron Star in Cassiopeia A Triggered by Neutron Superfluidity in Dense Matter
- Fast radio bursts: the last sign of supramassive neutron stars
- The Equation of State of Neutron-Star Matter in Strong Magnetic Fields
- Effects of Strong Magnetic Fields on Neutron Star Structure
- Low mass binary neutron star mergers : gravitational waves and neutrino emission
- How viscous is a superfluid neutron star core?
- Magnetar heating
- Observationally constraining gravitational wave emission from short gamma-ray burst remnants
- Magnetars: super(ficially) hot and super(fluid) cool
- The key role of magnetic fields in binary neutron star mergers
- Gamma-Ray Burst long lasting X-ray flaring activity
- On the stability and maximum mass of differentially rotating relativistic stars
- Ambipolar diffusion in superfluid neutron stars
- A global model of the magnetorotational instability in protoneutron stars
- The relevance of ambipolar diffusion for neutron star evolution
- Long-term evolution of a merger-remnant neutron star in general relativistic magnetohydrodynamics I: Effect of magnetic winding
- Oscillations of rotating magnetised neutron stars with purely toroidal magnetic fields
- Precessing magnetars as central engines in short gamma-ray bursts
- A self-consistent study of magnetic field effects on hybrid stars
- From microphysics to dynamics of magnetars
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- Premerger phenomena in neutron-star binary coalescences
- Gravitational Wave Searches for Post-Merger Remnants of GW170817 and GW190425
- Constraining the ellipticity and frequency of binary neutron star remnant via its gravitational-wave and electromagnetic radiations
- Magnetar structure in non-linear electrodynamics with mixed poloidal-toroidal fields