R-mode runaway and rapidly rotating neutron stars

Abstract

We present a simple spin evolution model that predicts that rapidly rotating accreting neutron stars will mainly be confined to a narrow range of spin-frequencies; P= 1.5-5 ms. This is in agreement with current observations of both neutron stars in the Low-Mass X-ray Binaries and millisecond radiopulsars. The main ingredients in the model are; i) the instability of r-modes above a critical spin rate, ii) thermal runaway due to heat released as viscous damping mechanisms counteract the r-mode growth, and iii) a revised estimate of the strength of dissipation due to the presence of a viscous boundary layer at the base of the crust in an old and relatively cold neutron star. We discuss the gravitational waves that are radiated during the brief r-mode driven spin-down phase. We also briefly touch on how the new estimates affects the predicted initial spin periods of hot young neutron stars.

5 pages incl. 2 figures, minor changes, accepted for publication in ApJ Letters

References in corpus (2)

• Observations of 20 millisecond pulsars in 47 Tucanae at 20 cm
• Viscous Boundary Layer Damping of R-Modes in Neutron Stars

Cited by in corpus (76)

• Strange Quark Matter and Compact Stars
• Binary and Millisecond Pulsars
• Rotating Stars in Relativity
• The r-mode instability in rotating neutron stars
• Saturation of the R-mode Instability
• Rotating Stars in Relativity
• Detecting gravitational wave emission from the known accreting neutron stars
• Thermonuclear burst oscillations
• Towards Understanding Astrophysical Effects of Nuclear Symmetry Energy
• Probing strange stars and color superconductivity by r-mode instabilities in millisecond pulsars
• Mountains on Neutron Stars: Accreted vs. Non-Accreted crusts
• Binary and Millisecond Pulsars
• Gravitational waves from freely precessing neutron stars
• Strange stars as persistent sources of gravitational waves
• Crust-core coupling and r-mode damping in neutron stars: a toy model
• Shear viscosity in neutron star cores
• R-Mode Oscillations and Spindown of Young Rotating Magnetic Neutron Stars
• Testing the Kerr black hole hypothesis
• The rotational modes of relativistic stars: Analytic results
• Effect of a neutron-star crust on the r-mode instability
• Nonlinear r-modes in Rapidly Rotating Relativistic Stars
• Bulk Viscosity in Hybrid Stars
• Ekman layer damping of r-modes revisited
• Asteroseismology: radial oscillations of neutron stars with realistic equation of state
• Superradiance in rotating stars and pulsar-timing constraints on dark photons
• Constraints on the symmetry energy from observational probes of the neutron star crust
• Sensitivity of the neutron star r-mode instability window to the density dependence of the nuclear symmetry energy
• Nuclear symmetry energy and the r-mode instability of neutron stars
• Conditions for Steady Gravitational Radiation from Accreting Neutron Stars
• Inferring Initial Spin Periods for Neutron Stars in Composite Remnant
• Excitation of a nonradial mode in a millisecond X-ray pulsar XTE J1751-305
• Nonlinear r-Modes in Neutron Stars: Instability of an unstable mode
• Strangeness in Neutron Stars
• Can we constrain the maximum value for the spin parameter of the super-massive objects in galactic nuclei without knowing their actual nature?
• Possible evidence of quark matter in neutron star X-ray binaries
• Gravitational wave emission from oscillating millisecond pulsars
• R-mode astronomy
• R-modes of neutron stars with a solid crust
• Ekman layers and the damping of inertial r-modes in a spherical shell: application to neutron stars
• Magnetic effects on the viscous boundary layer damping of the r-modes in neutron stars
• Probing the high-density behavior of symmetry energy with gravitational waves
• The r-modes in accreting neutron stars with magneto-viscous boundary layers
• Evolution of the spin parameter of accreting compact objects with non-Kerr quadrupole moment
• Simulating bulk viscosity in neutron stars. II. Evolution in spherical symmetry
• Spinning super-massive objects in galactic nuclei up to $a_{\ast }>1$
• Ultra-compact X-ray binaries as dual-line gravitational-wave sources
• Population Synthesis of Accreting Neutron Stars Emitting Gravitational Waves
• Precursor Plerionic Activity and High Energy Gamma-Ray Emission in the Supranova Model of Gamma-Ray Bursts
• A compact star rotating at 1122 Hz and the r-mode instability
• Detecting gravitational waves from accreting neutron stars
• r-modes of slowly rotating non-isentropic relativistic stars
• Gravitational Wave Astronomy
• Gravitational-wave astronomy: the high-frequency window
• Saturation of the f-mode instability in neutron stars: II. Applications and results
• Relativistic r-modes and Shear viscosity: regularizing the continuous spectrum
• Bulk viscosity of Mixed nucleon-hyperon-quark Matter in Neutron stars
• Entropy bounds for uncollapsed rotating bodies
• A Quark-Nova in the wake of a core-collapse Supernova: a unifying model for long duration Gamma-Ray Bursts and Fast Radio Bursts
• Modelling spin-up episodes in accreting millisecond X-ray pulsars
• The shear viscosity of two-flavor crystalline color superconducting quark matter
• Gravitational-wave-driven tidal secular instability in neutron star binaries
• The Critical Rotation of Strange Stars and Rapidly Rotating Pulsars
• Searching for gravitational waves with the LIGO and Virgo interferometers
• Influence of the nuclear matter equation of state on the r-mode instability using the finite-range simple effective interaction
• Radial oscillations and gravitational wave echoes of strange stars with nonvanishing lambda
• Evolution of newborn rapidly rotating magnetars: effects of r-mode and fall-back accretion
• Implication of Existence of Hybrid stars and Theoretical Expectation of Submillisecond Pulsars
• Gravitational wave bursts induced by r-mode spin-down of hybrid stars
• Gravitational waves interacting with a spinning charged particle in the presence of a uniform magnetic field
• Thermal Evolution of Strange Stars
• Radial Oscillations of the HESS J1731-347 Compact Object via the Karmarkar Condition in Gravity
• Evolutionary Self-Energy-Loss Effects in Compact Binary Systems: Importance of Rapid Rotation and of Equation of State
• High frequency sources of gravitational waves
• R-mode instability in compact stars
• Gravity Waves from Rotating Neutron Stars and Evaluation of Fast Chirp Transform Techniques
• Relativistic models of kHz QPOs