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arXiv · 1312.1442

Pressure of Degenerate and Relativistic electrons in a superhigh magnetic field

Zhi Fu Gao·Wang Na·Peng Qiu He·Du Yuan Jie
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Abstract

Based on our previous work, we deduce a general formula for pressure of degenerate and relativistic electrons,Pe, which is suitable for superhigh magnetic fields, discuss the quantization of Landau levels of electrons, and consider the quantum electrodynam-ic(QED) effects on the equations of states (EOSs) for different matter systems. The main conclusions are as follows:Pe is related to the magnetic field B, matter density ?, and electron fraction Ye ; the stronger the magnetic field, the higher the electron pressure becomes; the high electron pressure could be caused by high Fermi energy of electrons in a superhigh magnetic field; compared with a common radio pulsar, a magnetar could be a more compact oblate spheroid-like deformed neutron star due to the anisotropic total pressure; and an increase in the maximum mass of a magnetar is expected because of the positive contribution of the magnetic field energy to the EOS of the star.

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Zhi Fu Gao, Wang Na, Peng Qiu He, Du Yuan Jie. 2013-12-10. Pressure of Degenerate and Relativistic electrons in a superhigh magnetic field. https://doi.org/10.1142/s0217732313501381

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