22-27 March 2015
Hotel do Bosque
Brazil/East timezone

Testing effective models for compact stars

Not scheduled
3h 30m
Hotel do Bosque

Hotel do Bosque

Rodovia Mário Covas (Rio-Santos) BR - 101 Sul, Km 533, Angra dos Reis, RJ, Brazil
Poster Hadronic and quark matter - applications in astrophysics

Speaker

Mr José Carlos Jiménez Apaza (UFRJ)

Description

The study of the inner structure of compact stars requires the knowledge of the equation of state (EoS) for this kind of exotic stellar matter. This show us how the balance between gravitational attraction and microscopic interaction by means of the other fundamental interactions gives rise to the state of equilibrium in which they are observed currently. In the case of quark or hybrid neutron stars, it is known that the strong interaction plays the dominant role. In principle one could find the EoS for this kind of star matter using the fundamental equations of quantum chromodynamics (QCD). However, the non-perturbative regime of this theory is highly nontrivial and therefore one cannot find an exact EoS for the interior of such stars that takes into account all the physical and mathematical structure of QCD. Up to now one is only able to solve the fundamental equations if one simplifies QCD, keeping some relevant symmetries, in order to build effective models. In this work we test some EoS’s, which were obtained by using approximate results from effective models, by solving the Tolman-Oppenheimer-Volkoff (TOV) equations in order to determine some important intrinsic properties of such exotic stars, like the mass-radius relation, etc.

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