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astro-ph2007
PSR B1257+12: a quark star with planets?
Youling Yue, Renxin Xu
A recent observation has shown that PSR B1257+12 could have quite small X-ray emitting area, only about 2000 m, which is more than three orders smaller than the canonical polar…
astro-ph2005
To Understand the UV-optical Excess of RX J1856.5-3754
Y. L. Yue, X. H. Cui, R. X. Xu
The enigma source, RX J1856.5-3754, is one of the so-called dim thermal neutron stars. Two puzzles of RXJ1856.5-3754 exist: (1) the observational X-ray spectrum is completely featu…