Physics of Neutron Star Crusts

Chamel, Nicolas; Haensel, P.

doi:10.12942/lrr-2008-10

Cited by 665 publications

(823 citation statements)

References 379 publications

(716 reference statements)

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“…Pulsar Glitches and Magnetar Flares: Radio pulsars have very stable spins and their periods (P ) change very slowly over time. Their small spin-down rate (Ṗ < ∼ 10 −12 ), is occasionally marked by a sudden increase in angular frequency Ω, an event that is called a glitch [434]. To date more than 300 glitches have been observed in about 100 pulsars [435].…”

Section: A Menagerie Of Neutron-star Sourcesmentioning

confidence: 99%

Sources of Gravitational Waves: Theory and Observations

Buonanno

Sathyaprakash²

2015

General Relativity and Gravitation

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Section: A Menagerie Of Neutron-star Sourcesmentioning

confidence: 99%

Sources of Gravitational Waves: Theory and Observations

Buonanno

Sathyaprakash²

2015

General Relativity and Gravitation

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“…3.3 in Ref. [1] for a brief review). The composition of the crust was obtained from a nonrelativistic Skyrme effective nuclear Hamiltonian solved using the fourth-order extended Thomas-Fermi method with proton quantum shell effects added via the Strutinsky-Integral theorem.…”

Section: Microscopic Model For the Inner Crust Of A Neutron Starmentioning

confidence: 99%

Low-energy collective excitations in the neutron star inner crust

2013

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We study the low-energy collective excitations in the inner crust of the neutron star, where a neutron superfluid coexists with a Coulomb lattice of nuclei. The dispersion relation of the modes is calculated systematically from a microscopic theory including neutron band structure effects.These effects are shown to lead to a strong mixing between the Bogoliubov-Anderson bosons of the neutron superfluid and the longitudinal crystal lattice phonons. In addition, the speed of the transverse shear mode is greatly reduced as a large fraction of superfluid neutrons are entrained by nuclei. Not only does the much smaller velocity of the transverse mode increase the specific heat of the inner crust, it also decreases its electron thermal conductivity. These results may impact our interpretation of the thermal relaxation in accreting neutron stars. Due to strong mixing, the mean free path of the superfluid mode is found to be greatly reduced. Our results for the collective mode dispersion relations and their damping may also have implications for neutron star seismology.

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“…We itemize various corrections ignored in the present analysis as follows: (i) Compressibility. It leads to deviation of the liquid drop density from n 0 even in equilibrium, which in turn results in changes in the bulk energy (3), the surface energy (4), the curvature energy (6), and the Coulomb energy (8). To deal with the compressible case, we should assume a specific nucleon-nucleon effective interaction, which gives the density dependence of Eqs.…”

Section: Discussionmentioning

confidence: 99%

“…Since such non-spherical nuclei look like spaghetti, lasagna, macaroni, and Swiss cheese, respectively, they are often referred to as nuclear pasta (for reviews, see, e.g., Refs. [6][7][8]). Recently, by analogy with the polymer system, it was suggested that nuclei with a complicated shape called gyroid (G) may appear between the C and S phases, and similarly, the hole structure of gyroid (GH) may appear between the S and CH phases [9].…”

Section: Introductionmentioning

confidence: 99%

Curvature effect on nuclear “pasta”: Is it helpful for gyroid appearance?

2011

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In supernova cores and neutron star crusts, nuclei are thought to deform to rodlike and slablike shapes, which are often called nuclear pasta. We study the equilibrium properties of the nuclear pasta by using a liquid drop model with curvature corrections. It is confirmed that the curvature effect acts to lower the transition densities between different shapes. We also examine the gyroid structure, which was recently suggested as a different type of nuclear pasta by analogy with the polymer systems. The gyroid structure investigated in this paper is approximately formulated as an extension of the periodic minimal surface whose mean curvature vanishes. In contrast to our expectations, we find from the present approximate formulation that the curvature corrections act to slightly disfavor the appearance of the gyroid structure. By comparing the energy corrections in the gyroid phase and the hypothetical phases composed of d-dimensional spheres, where d is a general dimensionality, we show that the gyroid is unlikely to belong to a family of the generalized dimensional spheres.

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Physics of Neutron Star Crusts

Cited by 665 publications

References 379 publications

Sources of Gravitational Waves: Theory and Observations

Sources of Gravitational Waves: Theory and Observations

Low-energy collective excitations in the neutron star inner crust

Curvature effect on nuclear “pasta”: Is it helpful for gyroid appearance?

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