EDP Sciences
Free access
Volume 445, Number 2, January II 2006
Page(s) 627 - 631
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361:20053318

A&A 445, 627-631 (2006)
DOI: 10.1051/0004-6361:20053318

Effect of a strong magnetic field on the surface electric field of strange stars

X. P. Zheng and Y. W. Yu

The Institute of Astrophysics, Huazhong Normal University, Wuhan 430079, Hubei, PR China
    e-mail: zhxp@phy.ccnu.edu.cn

(Received 27 April 2005 / Accepted 26 July 2005 )

We made a detailed study of the properties of the electron layer near the quark surface of strange stars with strong ( ${\sim}10^{14}{-}10^{17}$ G) magnetic fields. The electrostatic potential and the electric field at the quark surface were calculated as functions of the magnetic field intensity of bare strange stars. Using an ultrastrong ( $B\geq 2.5\times10^{16}$ G) magnetic field, we found that the distribution of electrons becomes an exponential function of radial distance, which is quite different in a magnetic field-free case. We also calculated the variation in gap width between the strange core and the normal nuclear crust for strange stars, which is due to magnetic field effect.

Key words: dense matter -- stars: neutron -- stars: magnetic fields

© ESO 2005