Properties of condensed matter in very strong magnetic fields

Jones, P. B.

doi:10.1093/mnras/218.3.477

Cited by 70 publications

(61 citation statements)

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“…Note added in manuscript.-Equation (17) represents the extrapolation of calculations of Jones (1986) performed up to magnetic field of 10 13 G. Recently Medin & Lai (2006) presented results of exact calculations of the cohesive energy extended up 10 15 G. These results are close to those of J86 at lower magnetic fields as well as to our extrapolation to higher ones. Thus, our results based on equation (17) are quite robust.…”

Section: Discussionsupporting

confidence: 79%

“…Calculations of binding energies are difficult and uncertain (see Usov & Melrose [1995, 1996 and Lai [2001] for detailed discussion). In this paper we use the results of (Jones 1986, hereafter J86), which were recommended by Lai (2001) in his review paper as more robust than others. J86 obtained " c ¼ 0:29, Table 1, sorted according to pulsar period.…”

Section: Binding Energy Problemmentioning

confidence: 99%

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Formation of a Partially Screened Inner Acceleration Region in Radio Pulsars: Drifting Subpulses and Thermal X‐Ray Emission from Polar Cap Surface

Gil

Melikidze

Zhang

2006

ApJ

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The subpulse drifting phenomenon in pulsar radio emission is considered within the partially screened inner gap model, in which the sub-Goldreich-Julian thermionic flow of iron ions or electrons coexists with the spark-associated electron-positron plasma flow. We derive a simple formula that relates the thermal X-ray luminosity L X from the sparkheated polar cap and the E < B subpulse periodicityP 3 (polar cap carousel time). For PSRs B0943+10 and B1133+16, the only two pulsars for which bothP 3 and L X are known observationally, this formula holds well. For a few other pulsars, for which only one quantity is measured observationally, we predict the value of the other quantity and propose relevant observations that can confirm or discard the model. Then we further study the detailed physical conditions that allow such partially screened inner gap to form. By means of the condition T c /T s > 1 (where T c is the critical temperature above which the surface delivers a thermal flow to adequately supply the corotation charge density, and T s is the actual surface temperature), it is found that a partially screened gap (PSG) can be formed given that the near surface magnetic fields are very strong and curved. We consider both curvature radiation (CR) and resonant inverse Compton scattering (ICS) to produce seed photons for pair production, and find that the former is the main agency to produce gamma rays to discharge the PSG.

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Section: Discussionsupporting

confidence: 79%

Section: Binding Energy Problemmentioning

confidence: 99%

Formation of a Partially Screened Inner Acceleration Region in Radio Pulsars: Drifting Subpulses and Thermal X‐Ray Emission from Polar Cap Surface

Gil

Melikidze

Zhang

2006

ApJ

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“…In principle, a three-dimensional electronic band structure calculation is needed to solve this problem. So far the only attempt to this problem has been the preliminary calculations by Jones (1986) for a few elements and several values of field strengths using density functional theory.…”

Section: Condensed Mattermentioning

confidence: 99%

Physics of strongly magnetized neutron stars

Harding¹,

Lai²

2006

Rep. Prog. Phys.

801

763

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Abstract. There has recently been growing evidence for the existence of neutron stars possessing magnetic fields with strengths that exceed the quantum critical field strength of 4.4 × 10 13 G, at which the cyclotron energy equals the electron rest mass. Such evidence has been provided by new discoveries of radio pulsars having very high spin-down rates and by observations of bursting gamma-ray sources termed magnetars. This article will discuss the exotic physics of this high-field regime, where a new array of processes becomes possible and even dominant, and where familiar processes acquire unusual properties. We review the physical processes that are important in neutron star interiors and magnetospheres, including the behavior of free particles, atoms, molecules, plasma and condensed matter in strong magnetic fields, photon propagation in magnetized plasmas, free-particle radiative processes, the physics of neutron star interiors, and field evolution and decay mechanisms. Application of such processes in astrophysical source models, including rotation-powered pulsars, soft gamma-ray repeaters, anomalous X-ray pulsars and accreting X-ray pulsars will also be discussed. Throughout this review, we will highlight the observational signatures of high magnetic field processes, as well as the theoretical issues that remain to be understood.

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“…The work function W at the condensed surface of a neutron star crust is negligible for electrons and may be significant for ions (Ruderman 1974). However, detailed calculations of W (Jones 1986;Medin and Lai 2007) show that the typical temperatures of pulsars provide sufficient surface emission of ions; these free ions are picked up by the electric field and lifted to the magnetosphere.…”

Section: Vacuum Dipole Magnetospherementioning

confidence: 99%

Electrodynamics of Pulsar Magnetospheres

2016

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We review electrodynamics of rotating magnetized neutron stars, from the early vacuum model to recent numerical experiments with plasmafilled magnetospheres. Significant progress became possible due to the development of global particle-in-cell simulations which capture particle acceleration, emission of high-energy photons, and electron-positron pair creation. The numerical experiments show from first principles how and where electric gaps form, and promise to explain the observed pulsar activity from radio waves to gamma-rays.

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Properties of condensed matter in very strong magnetic fields

Cited by 70 publications

References 0 publications

Formation of a Partially Screened Inner Acceleration Region in Radio Pulsars: Drifting Subpulses and Thermal X‐Ray Emission from Polar Cap Surface

Formation of a Partially Screened Inner Acceleration Region in Radio Pulsars: Drifting Subpulses and Thermal X‐Ray Emission from Polar Cap Surface

Physics of strongly magnetized neutron stars

Electrodynamics of Pulsar Magnetospheres

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