Strange Quark Stars: The Role of Excluded Volume Effects
- Autores
- Lugones, G.; Grunfeld, Ana Gabriela
- Año de publicación
- 2024
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We study cold strange quark stars employing an enhanced version of the quark-massdensity-dependent model, which incorporates excluded volume effects to address non-perturbativeQCD repulsive interactions. We provide a comparative analysis of our mass formula parametrizationwith previous models from the literature. We identify the regions within the parameter spacewhere three-flavor quark matter is more stable than the most tightly bound atomic nucleus (stabilitywindow). Specifically, we show that excluded volume effects do not change the Gibbs freeenergy per baryon at zero pressure, rendering the stability window unaffected. The curves of pressureversus energy density exhibit various shapes—convex upward, concave downward, or nearlylinear—depending on the mass parametrization. This behavior results in different patterns of increase,decrease, or constancy in the speed of sound as a function of baryon number density. Weanalyze the mass–radius relationship of strange quark stars, revealing a significant increase in maximumgravitational mass and a shift in the curves toward larger radii as the excluded volume effectintensifies. Excluded volume effects render our models compatible with all modern astrophysicalconstraints, including the properties of the recently observed low-mass compact object HESSJ1731.
Fil: Lugones, G.. Universidad Federal do Abc; Brasil
Fil: Grunfeld, Ana Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina - Materia
-
neutron stars
equation of state
dense matter - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/238297
Ver los metadatos del registro completo
id |
CONICETDig_2a507581a1c0e514b54873f187053df9 |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/238297 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Strange Quark Stars: The Role of Excluded Volume EffectsLugones, G.Grunfeld, Ana Gabrielaneutron starsequation of statedense matterhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We study cold strange quark stars employing an enhanced version of the quark-massdensity-dependent model, which incorporates excluded volume effects to address non-perturbativeQCD repulsive interactions. We provide a comparative analysis of our mass formula parametrizationwith previous models from the literature. We identify the regions within the parameter spacewhere three-flavor quark matter is more stable than the most tightly bound atomic nucleus (stabilitywindow). Specifically, we show that excluded volume effects do not change the Gibbs freeenergy per baryon at zero pressure, rendering the stability window unaffected. The curves of pressureversus energy density exhibit various shapes—convex upward, concave downward, or nearlylinear—depending on the mass parametrization. This behavior results in different patterns of increase,decrease, or constancy in the speed of sound as a function of baryon number density. Weanalyze the mass–radius relationship of strange quark stars, revealing a significant increase in maximumgravitational mass and a shift in the curves toward larger radii as the excluded volume effectintensifies. Excluded volume effects render our models compatible with all modern astrophysicalconstraints, including the properties of the recently observed low-mass compact object HESSJ1731.Fil: Lugones, G.. Universidad Federal do Abc; BrasilFil: Grunfeld, Ana Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; ArgentinaMDPI2024-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/238297Lugones, G.; Grunfeld, Ana Gabriela; Strange Quark Stars: The Role of Excluded Volume Effects; MDPI; Universe; 10; 6; 5-2024; 1-172218-1997CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2218-1997/10/6/233info:eu-repo/semantics/altIdentifier/doi/10.3390/universe10060233info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:50:59Zoai:ri.conicet.gov.ar:11336/238297instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:50:59.473CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Strange Quark Stars: The Role of Excluded Volume Effects |
title |
Strange Quark Stars: The Role of Excluded Volume Effects |
spellingShingle |
Strange Quark Stars: The Role of Excluded Volume Effects Lugones, G. neutron stars equation of state dense matter |
title_short |
Strange Quark Stars: The Role of Excluded Volume Effects |
title_full |
Strange Quark Stars: The Role of Excluded Volume Effects |
title_fullStr |
Strange Quark Stars: The Role of Excluded Volume Effects |
title_full_unstemmed |
Strange Quark Stars: The Role of Excluded Volume Effects |
title_sort |
Strange Quark Stars: The Role of Excluded Volume Effects |
dc.creator.none.fl_str_mv |
Lugones, G. Grunfeld, Ana Gabriela |
author |
Lugones, G. |
author_facet |
Lugones, G. Grunfeld, Ana Gabriela |
author_role |
author |
author2 |
Grunfeld, Ana Gabriela |
author2_role |
author |
dc.subject.none.fl_str_mv |
neutron stars equation of state dense matter |
topic |
neutron stars equation of state dense matter |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
We study cold strange quark stars employing an enhanced version of the quark-massdensity-dependent model, which incorporates excluded volume effects to address non-perturbativeQCD repulsive interactions. We provide a comparative analysis of our mass formula parametrizationwith previous models from the literature. We identify the regions within the parameter spacewhere three-flavor quark matter is more stable than the most tightly bound atomic nucleus (stabilitywindow). Specifically, we show that excluded volume effects do not change the Gibbs freeenergy per baryon at zero pressure, rendering the stability window unaffected. The curves of pressureversus energy density exhibit various shapes—convex upward, concave downward, or nearlylinear—depending on the mass parametrization. This behavior results in different patterns of increase,decrease, or constancy in the speed of sound as a function of baryon number density. Weanalyze the mass–radius relationship of strange quark stars, revealing a significant increase in maximumgravitational mass and a shift in the curves toward larger radii as the excluded volume effectintensifies. Excluded volume effects render our models compatible with all modern astrophysicalconstraints, including the properties of the recently observed low-mass compact object HESSJ1731. Fil: Lugones, G.. Universidad Federal do Abc; Brasil Fil: Grunfeld, Ana Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina |
description |
We study cold strange quark stars employing an enhanced version of the quark-massdensity-dependent model, which incorporates excluded volume effects to address non-perturbativeQCD repulsive interactions. We provide a comparative analysis of our mass formula parametrizationwith previous models from the literature. We identify the regions within the parameter spacewhere three-flavor quark matter is more stable than the most tightly bound atomic nucleus (stabilitywindow). Specifically, we show that excluded volume effects do not change the Gibbs freeenergy per baryon at zero pressure, rendering the stability window unaffected. The curves of pressureversus energy density exhibit various shapes—convex upward, concave downward, or nearlylinear—depending on the mass parametrization. This behavior results in different patterns of increase,decrease, or constancy in the speed of sound as a function of baryon number density. Weanalyze the mass–radius relationship of strange quark stars, revealing a significant increase in maximumgravitational mass and a shift in the curves toward larger radii as the excluded volume effectintensifies. Excluded volume effects render our models compatible with all modern astrophysicalconstraints, including the properties of the recently observed low-mass compact object HESSJ1731. |
publishDate |
2024 |
dc.date.none.fl_str_mv |
2024-05 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/238297 Lugones, G.; Grunfeld, Ana Gabriela; Strange Quark Stars: The Role of Excluded Volume Effects; MDPI; Universe; 10; 6; 5-2024; 1-17 2218-1997 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/238297 |
identifier_str_mv |
Lugones, G.; Grunfeld, Ana Gabriela; Strange Quark Stars: The Role of Excluded Volume Effects; MDPI; Universe; 10; 6; 5-2024; 1-17 2218-1997 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2218-1997/10/6/233 info:eu-repo/semantics/altIdentifier/doi/10.3390/universe10060233 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
_version_ |
1844613568881754112 |
score |
13.070432 |