2003/05/31 by Markus H. Thoma, Markus H Thoma, Joachim Truemper +2 · 9 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Atomic and Subatomic Physics Research #Neutron #Neutron star #Pulsars and Gravitational Waves Research #Quark #Quark star #RADIUS #Strange matter #Strange quark #astro-ph #hep-ph #nucl-th
paper · pdf · doi:10.1088/0954-3899/30/1/055
published in Journal of Physics G Nuclear and Particle Physics 30(1), S471-S478 (IOP Publishing) · 7 pages, 4 figures, final version to be published in the SQM 2003 proceedings
arxiv created 2003/09/01 · openalex publication_date 2003/12/11 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 paper 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.