Quark Deconfinement in Rotating Neutron Stars

In this paper, we use a three flavor non-local Nambu–Jona-Lasinio (NJL) model, an improved effective model of Quantum Chromodynamics (QCD) at low energies, to investigate the existence of deconfined quarks in the cores of neutron stars. Particular emphasis is put on the possible existence of quark m...

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Autores principales: Mellinger, Richard D., Weber, Fridolin, Spinella, William, Contrera, Gustavo Aníbal, Orsaria, Milva Gabriela
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Astronomía
rotation
quarks
deconfinement
neutron star
pulsar
nuclear equation of state
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82203
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82203
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
rotation
quarks
deconfinement
neutron star
pulsar
nuclear equation of state
spellingShingle Astronomía
rotation
quarks
deconfinement
neutron star
pulsar
nuclear equation of state
Mellinger, Richard D.
Weber, Fridolin
Spinella, William
Contrera, Gustavo Aníbal
Orsaria, Milva Gabriela
Quark Deconfinement in Rotating Neutron Stars
topic_facet Astronomía
rotation
quarks
deconfinement
neutron star
pulsar
nuclear equation of state
description In this paper, we use a three flavor non-local Nambu–Jona-Lasinio (NJL) model, an improved effective model of Quantum Chromodynamics (QCD) at low energies, to investigate the existence of deconfined quarks in the cores of neutron stars. Particular emphasis is put on the possible existence of quark matter in the cores of rotating neutron stars (pulsars). In contrast to non-rotating neutron stars, whose particle compositions do not change with time (are frozen in), the type and structure of thematter in the cores of rotating neutron stars depends on the spin frequencies of these stars, which opens up a possible new window on the nature of matter deep in the cores of neutron stars. Our study shows that, depending on mass and rotational frequency, up to around 8% of the mass of a massive neutron star may be in the mixed quark-hadron phase, if the phase transition is treated as a Gibbs transition. We also find that the gravitational mass at which quark deconfinement occurs in rotating neutron stars varies quadratically with spin frequency, which can be fitted by a simple formula.
format Articulo
Articulo
author Mellinger, Richard D.
Weber, Fridolin
Spinella, William
Contrera, Gustavo Aníbal
Orsaria, Milva Gabriela
author_facet Mellinger, Richard D.
Weber, Fridolin
Spinella, William
Contrera, Gustavo Aníbal
Orsaria, Milva Gabriela
author_sort Mellinger, Richard D.
title Quark Deconfinement in Rotating Neutron Stars
title_short Quark Deconfinement in Rotating Neutron Stars
title_full Quark Deconfinement in Rotating Neutron Stars
title_fullStr Quark Deconfinement in Rotating Neutron Stars
title_full_unstemmed Quark Deconfinement in Rotating Neutron Stars
title_sort quark deconfinement in rotating neutron stars
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/82203
work_keys_str_mv AT mellingerrichardd quarkdeconfinementinrotatingneutronstars
AT weberfridolin quarkdeconfinementinrotatingneutronstars
AT spinellawilliam quarkdeconfinementinrotatingneutronstars
AT contreragustavoanibal quarkdeconfinementinrotatingneutronstars
AT orsariamilvagabriela quarkdeconfinementinrotatingneutronstars
bdutipo_str Repositorios
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