Domenico Logoteta
University of Coimbra
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Publication
Featured researches published by Domenico Logoteta.
EPL | 2011
I. Vidaña; Domenico Logoteta; C. Providencia; A. Polls; Ignazio Bombaci
A model based on a microscopic Brueckner-Hartree-Fock approach of hyperonic matter supplemented with additional simple phenomenological density-dependent contact terms is employed to estimate the effect of hyperonic three-body forces on the maximum mass of neutron stars. Our results show that although hyperonic three-body forces can reconcile the maximum mass of hyperonic stars with the current limit of 1.4–1.5M⊙, they are unable to provide the repulsion needed to make the maximum mass compatible with the observation of massive neutron stars, such as the recent measurements of the unusually high masses of the millisecond pulsars PSR J1614-2230 (1.97±0.04M⊙) and PSR J1903+0327 (1.667±0.021M⊙).
Physics Letters B | 2009
Ignazio Bombaci; Domenico Logoteta; P. K. Panda; Constança Providência; I. Vidaña
Abstract We study the quark deconfinement phase transition in hot β -stable hadronic matter. Assuming a first order phase transition, we calculate the enthalpy per baryon of the hadron–quark phase transition. We calculate and compare the nucleation rate and the nucleation time due to thermal and quantum nucleation mechanisms. We compute the crossover temperature above which thermal nucleation dominates the finite temperature quantum nucleation mechanism. We next discuss the consequences for the physics of proto-neutron stars. We introduce the concept of limiting conversion temperature and critical mass M cr for proto-hadronic stars, and we show that proto-hadronic stars with a mass M M cr could survive the early stages of their evolution without decaying to a quark star.
Physical Review D | 2013
Domenico Logoteta; Ignazio Bombaci
A phase of strong interacting matter with deconfined quarks is expected in the core of massive neutron stars. In this article, we perform a study of the hadron-quark phase transition in cold (T ¼ 0) neutron star matter and we calculate various structural properties of hybrid stars. For the quark phase, we make use of an equation of state (EOS) derived with the field correlator method (FCM) recently extended to the case of nonzero baryon density. For the hadronic phase, we consider both pure nucleonic and hyperonic matter, and we derive the corresponding EOS within a relativistic mean field approach. We make use of measured
Monthly Notices of the Royal Astronomical Society | 2013
Ignazio Bombaci; Domenico Logoteta
We study the hadron-quark phase transition in neutron star matter and the structural properties of hybrid stars using an equation of state (EOS) for the quark phase derived with the field correlator method (FCM). We make use of the measured neutron star masses, and particularly the mass of PSR J1614-2230, to constrain the values of the gluon condensate
European Physical Journal A | 2016
Ignazio Bombaci; Domenico Logoteta; I. Vidaña; Constança Providência
G_2
Astronomy and Astrophysics | 2011
Ignazio Bombaci; Domenico Logoteta; Constança Providência; I. Vidaña
which is one of the EOS parameter within the FCM. We find that the values of
Physical Review C | 2016
Domenico Logoteta; Ignazio Bombaci; A. Kievsky
G_2
Physical Review D | 2012
Domenico Logoteta; Ignazio Bombaci; Constança Providência; I. Vidaña
extracted from the mass measurement of PSR J1614-2230 are fully consistent with the values of the same quantity derived, within the FCM, from recent lattice quantum chromodynamics (QCD) calculations of the deconfinement transition temperature at zero baryon chemical potential. The FCM thus provides a powerful tool to link numerical calculations of QCD on a space-time lattice with neutron stars physics.
New Astronomy | 2017
Sudip Bhattacharyya; Ignazio Bombaci; Debades Bandyopadhyay; Arun V. Thampan; Domenico Logoteta
Abstract.A phase of strong interacting matter with deconfined quarks is expected in the core of massive neutron stars. We investigate the quark deconfinement phase transition in cold (
2ND IBERIAN NUCLEAR ASTROPHYSICS MEETING ON COMPACT STARS | 2012
Domenico Logoteta; I. Vidaña; Constança Providência; A. Polls; Ignazio Bombaci
T=0