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dc.contributor.author
Daniela, Curin
dc.contributor.author
Ranea Sandoval, Ignacio Francisco
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Mariani, Mauro
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Orsaria, Milva Gabriela
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Weber, Fridolin
dc.date.available
2022-08-30T19:12:07Z
dc.date.issued
2021-10
dc.identifier.citation
Daniela, Curin; Ranea Sandoval, Ignacio Francisco; Mariani, Mauro; Orsaria, Milva Gabriela; Weber, Fridolin; Hybrid stars with color superconducting cores in an extended FCM model; MDPI; Universe; 7; 10; 10-2021; 1-19
dc.identifier.issn
2218-1997
dc.identifier.uri
http://hdl.handle.net/11336/166987
dc.description.abstract
We investigate the influence of repulsive vector interactions and color superconductivity on the structure of neutron stars using an extended version of the field correlator method (FCM) for the description of quark matter. The hybrid equation of state is constructed using the Maxwell description, which assumes a sharp hadron-quark phase transition. The equation of state of hadronic matter is computed for a density-dependent relativistic lagrangian treated in the mean-field approximation, with parameters given by the SW4L nuclear model. This model described the interactions among baryons in terms of σ, ω, ρ, σ∗, and φ mesons. Quark matter is assumed to be in either the CFL or the 2SC+s color superconducting phase. The possibility of sequential (hadron-quark, quark-quark) transitions in ultra-dense matter is investigated. Observed data related to massive pulsars, gravitational-wave events, and NICER are used to constrain the parameters of the extended FCM model. The successful equations of state are used to explore the mass-radius relationship, radii, and tidal deformabilities of hybrid stars. A special focus lies on investigating consequences that slow or fast conversions of quark-hadron matter have on the stability and the mass-radius relationship of hybrid stars. We find that if slow conversion should occur, a new branch of stable massive stars would exist whose members have radii that are up to 1.5 km smaller than those of conventional neutron stars of the same mass. Such objects could be possible candidates for the stellar high-mass object of the GW190425 binary system.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
MDPI
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
NEUTRON STARS
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HYBRID STARS
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EQUATION OF STATE
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COLOR SUPERCONDUCTIVITY
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Hybrid stars with color superconducting cores in an extended FCM model
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-08-29T17:31:21Z
dc.journal.volume
7
dc.journal.number
10
dc.journal.pagination
1-19
dc.journal.pais
Suiza
dc.journal.ciudad
Basilea
dc.description.fil
Fil: Daniela, Curin. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Universidad Nacional de La Plata; Argentina
dc.description.fil
Fil: Ranea Sandoval, Ignacio Francisco. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Mariani, Mauro. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Orsaria, Milva Gabriela. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Weber, Fridolin. San Diego State University; Estados Unidos
dc.journal.title
Universe
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2218-1997/7/10/370
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3390/universe7100370
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