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Title:
Strange Stars: Can Their Crust Reach the Neutron Drip Density ?
Authors:
Fu, Hai; Huang, Yong-Feng
Affiliation:
AA(Department of Astronomy, Nanjing University, Nanjing 210093 ), AB(Department of Astronomy, Nanjing University, Nanjing 210093)
Publication:
Chinese Journal of Astronomy & Astrophysics, Vol. 3, No. 6, p. 535-542
Publication Date:
12/2003
Origin:
CHJAA
Keywords:
dense matter --- elementary particles --- stars: neutron
Bibliographic Code:
2003ChJAA...3..535F

Abstract

The electrostatic potential of electrons near the surface of static strange stars at zero temperature is studied within the frame of the MIT bag model. We find that for QCD parameters within rather wide ranges, if the nuclear crust on the strange star is at a density leading to neutron drip, then the electrostatic potential will be insufficient to establish an outwardly directed electric field, which is crucial for the survival of such a crust. If a minimum gap width of 200 fm is brought in as a more stringent constraint, then our calculations will completely rule out the possibility of such crusts. Therefore, our results argue against the existence of neutron-drip crusts in nature.

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