By introducing Dirac's -function in superhigh magnetic fields, we deduce a general formula for the 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: the stronger the magnetic field strength, the higher the electron pressure becomes; 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. Since this is an original work in which some uncertainties could exist, modifications and improvements of our theory should be considered in our future studies. ((c) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
WOS标题词:
Science & Technology
; Physical Sciences
类目[WOS]:
Astronomy & Astrophysics
研究领域[WOS]:
Astronomy & Astrophysics
关键词[WOS]:
IRON-GROUP NUCLEI
; ELECTRON-CAPTURE
; NI-56
; DECAY
; RAY
Xinjiang Natural Science Foundation(2013211A053)
; Chinese National Science Foundation(11273051
; National Basic Research Program of China grants 973 Programs(2012CB821801)
; Strategic Priority Research Program "The Emergence of Cosmological Structures" of Chinese Academy of Sciences(XDB09000000)
; Qinglan project of Jiangsu Province
; 11173041
; 11133001
; 11447165
; 11373006
; 11173042)
