Quark-hybrid matter in the cores of massive neutron stars

Using a nonlocal extension of the SU(3) Nambu-Jona-Lasinio model, which reproduces several of the key features of quantum chromodynamics, we show that mixed phases of deconfined quarks and confined hadrons (quark-hybrid matter) may exist in the cores of neutron stars as massive as around 2.1M ⊙. T...

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Detalles Bibliográficos
Autores principales: Orsaria, Milva Gabriela, Rodrigues, H., Weber, F., Contrera, Gustavo Aníbal
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Astronómicas
Quarks
Stars
Hybrid star
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85576
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85576
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Quarks
Stars
Hybrid star
spellingShingle Ciencias Astronómicas
Quarks
Stars
Hybrid star
Orsaria, Milva Gabriela
Rodrigues, H.
Weber, F.
Contrera, Gustavo Aníbal
Quark-hybrid matter in the cores of massive neutron stars
topic_facet Ciencias Astronómicas
Quarks
Stars
Hybrid star
description Using a nonlocal extension of the SU(3) Nambu-Jona-Lasinio model, which reproduces several of the key features of quantum chromodynamics, we show that mixed phases of deconfined quarks and confined hadrons (quark-hybrid matter) may exist in the cores of neutron stars as massive as around 2.1M ⊙. The radii of these objects are found to be in the canonical range of ∼12-13 km. According to our study, the transition to pure quark matter does not occur in stable neutron stars, but is shifted to neutron stars which are unstable against radial oscillations. The implications of our study for the recently discovered, massive neutron star PSR J1614-2230, whose gravitational mass is 1.97±0.04M⊙, are that this neutron star may contain an extended region of quark-hybrid matter at it center, but no pure quark matter.
format Articulo
Articulo
author Orsaria, Milva Gabriela
Rodrigues, H.
Weber, F.
Contrera, Gustavo Aníbal
author_facet Orsaria, Milva Gabriela
Rodrigues, H.
Weber, F.
Contrera, Gustavo Aníbal
author_sort Orsaria, Milva Gabriela
title Quark-hybrid matter in the cores of massive neutron stars
title_short Quark-hybrid matter in the cores of massive neutron stars
title_full Quark-hybrid matter in the cores of massive neutron stars
title_fullStr Quark-hybrid matter in the cores of massive neutron stars
title_full_unstemmed Quark-hybrid matter in the cores of massive neutron stars
title_sort quark-hybrid matter in the cores of massive neutron stars
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/85576
work_keys_str_mv AT orsariamilvagabriela quarkhybridmatterinthecoresofmassiveneutronstars
AT rodriguesh quarkhybridmatterinthecoresofmassiveneutronstars
AT weberf quarkhybridmatterinthecoresofmassiveneutronstars
AT contreragustavoanibal quarkhybridmatterinthecoresofmassiveneutronstars
bdutipo_str Repositorios
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