RXJ1856.5-3754 and RXJ0720.4-3125 are P-Stars

Details RXJ1856.5-3754 and RXJ0720.4-3125 are P-Stars RXJ1856.5-3754 and RXJ0720.4-3125 are P-Stars

2004-01-16

arxiv.org/abs/astro-ph/0401339v2

JCAP 0403 (2004) 011

Astronomy and Astrophysics

Astrophysics

18 pages, 2 figures, revised version, to appear in JCAP

Scientific paper

10.1088/1475-7516/2004/03/011

P-stars are a new class of compact stars made of up and down quarks in $\beta$-equilibrium with electrons in a chromomagnetic condensate. P-stars are able to account for compact stars with $R \lesssim 6 Km$, as well as stars comparable to canonical neutron stars. We show that P-stars once formed are absolutely stable, for they cannot decay into neutron or strange stars. We convincingly argue that the nearest isolated compact stars RXJ1856.5-3754 and RXJ0720.4-3125 could be interpreted as P-stars with $M \simeq 0.8 M_{\bigodot}$ and $R \simeq 5 Km$.

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