Landau quantization and neutron emissions by nuclei in the crust of a magnetar

Chamel, Nicolas; Mutafchieva, Y. D.; Stoyanov, Zh. K.; Mihailov, L.M.; Pavlov, R. L.

doi:10.1088/1742-6596/724/1/012034

Cited by 6 publications

(7 citation statements)

References 30 publications

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“…It has been recently shown that 1 S 0 pairing in pure neutron matter is destroyed if the magnetic field strength exceeds ∼ 10 17 G [109]. Moreover, the magnetic field may also shift the onset of the neutrondrip transition in dense matter to higher or lower densities due to Landau quantization of electron motion thus changing the spatial extent of the superfluid region in magnetar crusts [110,111,112,113].…”

Section: Role Of a High Magnetic Fieldmentioning

confidence: 99%

Superfluidity and Superconductivity in Neutron Stars

Chamel

2017

J Astrophys Astron

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Neutron stars, the compact stellar remnants of core-collapse supernova explosions, are unique cosmic laboratories for exploring novel phases of matter under extreme conditions. In particular, the occurrence of superfluidity and superconductivity in neutron stars will be briefly reviewed.Comment: Has appeared in Journal of Astrophysics and Astronomy special issue on "Physics of Neutron Stars and Related Objects", celebrating the 75th birth-year of G. Srinivasa

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Section: Role Of a High Magnetic Fieldmentioning

confidence: 99%

Superfluidity and Superconductivity in Neutron Stars

Chamel

2017

J Astrophys Astron

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“…For higher magnetic fields, B B rel as measured in SGRs, AXPs, and some radio pulsars, the composition changes depending on the magnetic field strength [6,7,8,9]. In particular, the maximum baryon number densityn max 1 up to which a nuclide (A 1 , Z 1 ) is present exhibit universal quantum oscillations as a function of the magnetic field strength, and increases almost linearly in the strongly quantizing regime [9,10,11]. For comparison, we shall thus consider two extreme situations: i) unmagnetized neutron stars with B ≡ B/B rel = 0, and ii) highlymagnetized neutron stars with a strongly quantizing field B = 2000 (in any region of the outer crust, electrons are confined to the lowest energy level).…”

Section: Model Of the Outer Crustmentioning

confidence: 98%

Stratification of the outer crust of magnetars and nuclear abundances

Stoyanov¹,

Mutafchieva²,

Chamel³

2019

AIP Conference Proceedings

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The r-process triggered by the decompression of ejected crustal materials from binary neutron star mergers has been recently confirmed by observations of the kilonova following the detection of gravitational waves from GW170817. Isolated neutron stars endowed with very high magnetic fields, so called magnetars, might be also at the origin of r-process nucleosynthesis since some material is ejected during giant flares. The final abundance distribution depends on the crustal composition. Making use of the latest experimental nuclear mass data supplemented with microscopic models, we show that the presence of a high magnetic field can have a significant influence on the stratification of neutron-star crusts and on the nuclear abundances of the different layers.

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“…In addition, it was recently shown in Refs. [79,80] that as a result of Landau quantization of electrons' motion under the strong magnetic field of a magnetar, the neutron-drip transition in the crust of the star is shifted to either higher or lower densities depending on the magnetic field strength. The quantization of the motion of the electrons also makes the star's crust almost incompressible, leading to a density that remains almost unchanged over a wide range of pressures.…”

Section: With a Power-law Deviationmentioning

confidence: 99%

Landau Levels in a Gravitational Field: The Schwarzschild Spacetime Case

Landry

Hammad

2021

Universe

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We investigate the gravitational effect on Landau levels. We show that the familiar infinite Landau degeneracy of the energy levels of a quantum particle moving inside a uniform and constant magnetic field is removed by the interaction of the particle with a gravitational field. Two independent approaches are used to solve the relevant Schrödinger equation within the Newtonian approximation. It is found that both approaches yield qualitatively similar results within their respective approximations. With the goal of clarifying some results found in the literature concerning the use of a third independent approach for extracting the quantization condition based on a similar differential equation, we show that such an approach cannot yield a general and yet consistent result. We point out to the more accurate, but impractical, way to use such an approach; a way which does in principle yield a consistent quantization condition. We discuss how our results could be used to contribute in a novel way to the existing methods for testing gravity at the tabletop experiments level as well as at the astrophysical observational level by deriving the corrections brought by Yukawa-like and power-law deviations from the inverse-square law. The full relativistic regime is also examined in detail.

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Landau quantization and neutron emissions by nuclei in the crust of a magnetar

Cited by 6 publications

References 30 publications

Superfluidity and Superconductivity in Neutron Stars

Superfluidity and Superconductivity in Neutron Stars

Stratification of the outer crust of magnetars and nuclear abundances

Landau Levels in a Gravitational Field: The Schwarzschild Spacetime Case

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