Physics
Scientific paper
Nov 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010vaoa.conf..121v&link_type=abstract
"Evolution of Cosmic Objects through their Physical Activity, Proceedings of the Conference dedicated to Viktor Ambartsumian's 1
Physics
Strange Stars, Hadron-Quark Phase Transition, Neutron Stars With A Quark Core
Scientific paper
In pioneer work of V.A.Ambartsumian and G.S. Sahakian it has been shown that degenerated nuclear plasma may contain, besides neutrons, protons and electrons, also strange baryons - hyperons. G.S. Sahakian and Yu.L. Vartanian for the first time have shown that taking into account the interaction between baryons makes possible the existence of hyperons in the central regions of stable neutron stars. A new interest towards strange nuclear plasma has arisen when Witten supposed, that quark-electron plasma with a strangeness - 1 per baryon may be absolutely stable state of cold superdense matter. Possible implications for quark phase transition inside superdense stars are studied, based on the series of calculated models. The stars considered were pure quark stars (or strange stars) and hybrid stars consisting of a quark matter core with a nuclear matter crust around. The detailed analysis of the parameters of calculated configurations, useful for comparison with neutron star observables, is carried out. Such comparison might help to test the used equations of state for superdense matter. The observational consequences are affected very much by the features of the process of star restructuring, when phase transition occurs in the interior of a star. Possible observational tests are discussed to distinguish between the ordinary neutron stars, strange stars and superdense hybrid stars.
Harutyunyan Anahit R.
Vartanyan Yuri L.
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