Speakers
Gao Zhi Fu
(Xinjiang Astronomical Observatory, Chinese Academy of Sciences)
Wang Na
(Xinjiang Astronomical Observatory, Chinese Academy of Sciences)
Description
Based on our previous work, we deduce a general formula for pressure of
degenerate and relativistic electrons, $P_{e}$, which is suitable for
superhigh magnetic fields, discuss the quantization of Landau levels of
electrons, and consider the quantum electrodynamic(QED) effects on the
equations of states (EOSs) for different matter systems. The main
conclusions are as follows: $P_{e}$ is related to the magnetic field $B$,
matter density $\rho$, and electron fraction $Y_{e}$; 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.
Author
Gao Zhi Fu
(Xinjiang Astronomical Observatory, Chinese Academy of Sciences)
Co-author
Wang Na
(Xinjiang Astronomical Observatory, Chinese Academy of Sciences)
