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.
Primary authors
Prof.
Eduardo Fraga
(UFRJ)
Mr
José Carlos Jiménez Apaza
(UFRJ)
