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Masking equation of state effects in binary neutron star mergers
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Recent nonmagnetized studies of binary neutron star mergers have indicated the possibility of identifying equation of state features, such as a phase transition or a quark-hadron crossover, based on the frequency shift of the main peak in the postmerger gravitational wave spectrum. By performing a series of general relativistic, magnetohydrodynamic simulations we show that similar frequency shifts can be obtained due to the effect of the magnetic field. The existing degeneracy can either mask or nullify a shift due to a specific equation of state feature, and therefore the interpretation of observational data is more complicated than previously thought, requiring a more complete treatment that would necessarily include the neutron star's magnetic field.
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Cited by 3 Pith papers
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Transport Properties of the MRI in Differentially Rotating Neutron Stars
Saturated MRI turbulence in differentially rotating neutron stars yields ℓ_mix ≈ (0.01–0.1) λ_MRI, largely independent of density, so standard GRLES mixing-length prescriptions overestimate transport by about an order...
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Magnetic Field Configurations in Binary Neutron Star Mergers II: Inspiral, Merger and Ejecta
Initial magnetic field topology, especially anti-aligned poloidal fields, strongly controls post-merger field amplification and ejecta magnetisation in neutron star merger simulations.
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The impact of hyperons on neutron star mergers: gravitational waves, mass ejection and black hole formation
Hyperonic equations of state raise the dominant postmerger gravitational-wave frequency by a few percent and reduce the prompt black hole formation threshold by about 0.05 solar masses.
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