RX J1856.5-3754 as a possible Strange Star candidate

Details RX J1856.5-3754 as a possible Strange Star candidate RX J1856.5-3754 as a possible Strange Star candidate

2007-02-08

arxiv.org/abs/astro-ph/0702234v1

Astrophys.SpaceSci.308:513-517,2007

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures; to appear in proceedings of the conference "Isolated Neutron Stars: From the Interior to the Surface", eds

Scientific paper

10.1007/s10509-007-9329-7

RX J1856.5-3754 has been proposed as a strange star candidate due to its very small apparent radius measured from its X-ray thermal spectrum. However, its optical emission requires a much larger radius and thus most of the stellar surface must be cold and undetectable in X-rays. In the case the star is a neutron star such a surface temperature distribution can be explained by the presence of a strong toroidal field in the crust (Perez-Azorin et al. 2006, Geppert et al. 2006). We consider a similar scenario for a strange star with a thin baryonic crust to determine if such a magnetic field induced effect is still possible.

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