Search Results - "Haskell, B"
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The Spin Distribution of Fast-spinning Neutron Stars in Low-mass X-Ray Binaries: Evidence for Two Subpopulations
Published in The Astrophysical journal (20-11-2017)“…We study the current sample of rapidly rotating neutron stars in both accreting and non-accreting binaries in order to determine whether the spin distribution…”
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2
Superfluid vortex-mediated mutual friction in non-homogeneous neutron star interiors
Published in Monthly notices of the Royal Astronomical Society (01-12-2020)“…ABSTRACT Understanding the average motion of a multitude of superfluid vortices in the interior of a neutron star is a key ingredient for most theories of…”
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3
Are Gravitational Waves Spinning Down PSR J1023+0038?
Published in Physical review letters (20-10-2017)“…The pulsar J1023+0038 rotates with a frequency ν≈592 Hz and has been observed to transition between a radio state, during which it is visible as a millisecond…”
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Thermodynamic Stability Implies Causality
Published in Physical review letters (07-01-2022)“…The stability conditions of a relativistic hydrodynamic theory can be derived directly from the requirement that the entropy should be maximized in…”
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Asymmetric accretion and thermal ‘mountains’ in magnetized neutron star crusts
Published in Monthly notices of the Royal Astronomical Society (01-04-2020)“…ABSTRACT Accreting neutron stars (NSs) are one of the main targets for continuous gravitational wave searches, as asymmetric accretion may lead to quadrupolar…”
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Turbulent, pinned superfluids in neutron stars and pulsar glitch recoveries
Published in Monthly notices of the Royal Astronomical Society (01-11-2020)“…ABSTRACT Pulsar glitches offer an insight into the dynamics of superfluids in the high-density interior of a neutron star. To model these phenomena, however,…”
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7
On the universality of I-Love-Q relations in magnetized neutron stars
Published in Monthly notices of the Royal Astronomical Society. Letters (01-02-2014)“…Recently, general relations among the quadrupole moment (Q), the moment of inertia (I) and the tidal deformability (Love number) of a neutron star were shown…”
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8
Crust or core? Insights from the slow rise of large glitches in the Crab pulsar
Published in Monthly notices of the Royal Astronomical Society. Letters (01-11-2018)“…ABSTRACT Pulsar glitches are attributed to the sudden recoupling of weakly coupled superfluid components in the neutron star interior. The transfer of angular…”
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9
Stochastic Approximation for Risk-Aware Markov Decision Processes
Published in IEEE transactions on automatic control (01-03-2021)“…We develop a stochastic approximation-type algorithm to solve finite state/action, infinite-horizon, risk-aware Markov decision processes. Our algorithm has…”
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10
A universal formula for the relativistic correction to the mutual friction coupling time-scale in neutron stars
Published in Monthly notices of the Royal Astronomical Society (21-05-2020)“…ABSTRACT Vortex-mediated mutual friction governs the coupling between the superfluid and normal components in neutron star interiors. By, for example,…”
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Detecting gravitational waves from mountains on neutron stars in the advanced detector era
Published in Monthly notices of the Royal Astronomical Society (01-07-2015)“…Rapidly rotating neutron stars (NSs) in low-mass X-ray binaries (LMXBs) are thought to be interesting sources of gravitational waves (GWs) for current and next…”
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12
Magnetic fields in late-stage proto-neutron stars
Published in Monthly notices of the Royal Astronomical Society (01-05-2021)“…ABSTRACT We explore the thermal and magnetic field structure of a late-stage proto-neutron star (proto-NS). We find the dominant contribution to the entropy in…”
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13
Pinned vortex hopping in a neutron star crust
Published in Monthly notices of the Royal Astronomical Society (11-09-2016)“…The motion of superfluid vortices in a neutron star crust is at the heart of most theories of pulsar glitches. Pinning of vortices to ions can decouple the…”
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14
Simulating pulsar glitches: an N-body solver for superfluid vortex motion in two dimensions
Published in Monthly notices of the Royal Astronomical Society (01-10-2020)“…ABSTRACT A rotating superfluid forms an array of quantized vortex lines that determine its angular velocity. The spasmodic evolution of the array under the…”
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15
Mesoscopic pinning forces in neutron star crusts
Published in Monthly notices of the Royal Astronomical Society (01-02-2016)“…The crust of a neutron star is thought to be comprised of a lattice of nuclei immersed in a sea of free electrons and neutrons. As the neutrons are superfluid,…”
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16
The Enigmatic Spin Evolution of PSR J0537-6910: r-modes, Gravitational Waves, and the Case for Continued Timing
Published in The Astrophysical journal (10-09-2018)“…We discuss the unique spin evolution of the young X-ray pulsar PSR J0537-6910, a system in which the regular spin down is interrupted by glitches every few…”
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Observational constraints on neutron star crust–core coupling during glitches
Published in Monthly notices of the Royal Astronomical Society (21-12-2015)“…We demonstrate that observations of glitches in the Vela pulsar can be used to investigate the strength of the crust–core coupling in a neutron star and…”
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18
Modelling magnetically deformed neutron stars
Published in Monthly notices of the Royal Astronomical Society (21-03-2008)“…Rotating deformed neutron stars are important potential sources for ground-based gravitational wave interferometers such as LIGO, GEO600 and VIRGO. One…”
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The effect of non-linear mutual friction on pulsar glitch sizes and rise times
Published in Monthly notices of the Royal Astronomical Society (01-08-2020)“…ABSTRACT Observations of pulsar glitches have the potential to provide constraints on the dynamics of the high density interior of neutron stars. However, to…”
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20
A new mechanism for saturating unstable r modes in neutron stars
Published in Monthly notices of the Royal Astronomical Society (21-06-2014)“…We consider a new mechanism for damping the oscillations of a mature neutron star. The new dissipation channel arises if superfluid vortices are forced to cut…”
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