Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-05-14
J.Phys. G30 (2004) S471-S478
Astronomy and Astrophysics
Astrophysics
7 pages, 4 figures, final version to be published in the SQM 2003 proceedings
Scientific paper
10.1088/0954-3899/30/1/055
It has been predicted that quark and hybrid stars, containing strange quark matter in their core, have a significantly smaller radius than ordinary neutron stars. Preliminary X-ray observations of isolated neutron stars indicated a surprisingly small radius consistent with quark matter in the interior of the star. However, a new analysis of the data led to a radius corresponding to an ordinary neutron star. In the present talk we will discuss theoretical calculations of the mass-radius relation for quark and hybrid stars, taking into account medium effects in quark matter, and report on recent X-ray observations by Chandra and XMM and their latest interpretation.
Burwitz Vadim
Thoma Markus H.
Truemper Joachim
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