Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807

Autores
Albayati, A. C.; Bult, P.; Altamirano, D.; Chenevez, J.; Guillot, S.; Güver, T.; Jaisawal, G. K.; Malacaria, C.; Mancuso, Giulio Cesare; Marino, A.; Ng, M.; Sanna, A.; Strohmayer, T. E.
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Swift J1749.4-2807 is the only known eclipsing accreting millisecond X-ray pulsar. In this paper, we report on seven thermonuclear (Type-I) X-ray bursts observed by NICER during its 2021 outburst. The first six bursts show slow rises and long decays, indicative of mixed H/He fuel, whereas the last burst shows fast rise and decay, suggesting He-rich fuel. Time-resolved spectroscopy of the bursts revealed typical phenomenology (i.e. an increase in blackbody temperature during the burst rise, and steady decrease in the decay), however, they required a variable NH. We found that the values of NH during the bursts were roughly double those found in the fits of the persistent emission prior to each burst. We interpret this change in absorption as evidence of burst-disc interaction, which we observe due to the high inclination of the system. We searched for burst oscillations during each burst and detected a signal in the first burst at the known spin frequency of the neutron star (517.92 Hz). This is the first time burst oscillations have been detected from Swift J1749.4-2807. We further find that each X-ray burst occurs on top of an elevated persistent count rate. We performed time-resolved spectroscopy on the combined data of the bursts with sufficient statistics (i.e. the clearest examples of this phenomenon) and found that the blackbody parameters evolve to hotter temperatures closer to the onset of the bursts. We interpret this as a consequence of an unusual marginally stable burning process similar to that seen through mHz QPOs.
Fil: Albayati, A. C.. University of Southampton; Reino Unido
Fil: Bult, P.. University of Maryland; Estados Unidos
Fil: Altamirano, D.. University of Southampton; Reino Unido
Fil: Chenevez, J.. Technical University of Denmark; Dinamarca
Fil: Guillot, S.. Cnes Centre National D'etudes Spatiales; Francia
Fil: Güver, T.. Istanbul Üniversitesi; Turquía
Fil: Jaisawal, G. K.. Technical University of Denmark; Dinamarca
Fil: Malacaria, C.. International Space Science Institute; Suiza
Fil: Mancuso, Giulio Cesare. Universidad Nacional de La Plata; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Marino, A.. Instituto de Estudios Espaciales de Cataluña; España
Fil: Ng, M.. MIT Kavli Institute For Astrophysics And Space Research; Estados Unidos
Fil: Sanna, A.. Università Degli Studi Di Cagliari; Italia
Fil: Strohmayer, T. E.. Nasa Goddard Space Flight Center; Estados Unidos
Materia
STARS: INDIVIDUAL (SWIFT J1749.4-2807)
STARS: NEUTRON
X-RAYS: BINARIES
X-RAYS: BURSTS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/228858
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/228858
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807Albayati, A. C.Bult, P.Altamirano, D.Chenevez, J.Guillot, S.Güver, T.Jaisawal, G. K.Malacaria, C.Mancuso, Giulio CesareMarino, A.Ng, M.Sanna, A.Strohmayer, T. E.STARS: INDIVIDUAL (SWIFT J1749.4-2807)STARS: NEUTRONX-RAYS: BINARIESX-RAYS: BURSTShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Swift J1749.4-2807 is the only known eclipsing accreting millisecond X-ray pulsar. In this paper, we report on seven thermonuclear (Type-I) X-ray bursts observed by NICER during its 2021 outburst. The first six bursts show slow rises and long decays, indicative of mixed H/He fuel, whereas the last burst shows fast rise and decay, suggesting He-rich fuel. Time-resolved spectroscopy of the bursts revealed typical phenomenology (i.e. an increase in blackbody temperature during the burst rise, and steady decrease in the decay), however, they required a variable NH. We found that the values of NH during the bursts were roughly double those found in the fits of the persistent emission prior to each burst. We interpret this change in absorption as evidence of burst-disc interaction, which we observe due to the high inclination of the system. We searched for burst oscillations during each burst and detected a signal in the first burst at the known spin frequency of the neutron star (517.92 Hz). This is the first time burst oscillations have been detected from Swift J1749.4-2807. We further find that each X-ray burst occurs on top of an elevated persistent count rate. We performed time-resolved spectroscopy on the combined data of the bursts with sufficient statistics (i.e. the clearest examples of this phenomenon) and found that the blackbody parameters evolve to hotter temperatures closer to the onset of the bursts. We interpret this as a consequence of an unusual marginally stable burning process similar to that seen through mHz QPOs.Fil: Albayati, A. C.. University of Southampton; Reino UnidoFil: Bult, P.. University of Maryland; Estados UnidosFil: Altamirano, D.. University of Southampton; Reino UnidoFil: Chenevez, J.. Technical University of Denmark; DinamarcaFil: Guillot, S.. Cnes Centre National D'etudes Spatiales; FranciaFil: Güver, T.. Istanbul Üniversitesi; TurquíaFil: Jaisawal, G. K.. Technical University of Denmark; DinamarcaFil: Malacaria, C.. International Space Science Institute; SuizaFil: Mancuso, Giulio Cesare. Universidad Nacional de La Plata; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Marino, A.. Instituto de Estudios Espaciales de Cataluña; EspañaFil: Ng, M.. MIT Kavli Institute For Astrophysics And Space Research; Estados UnidosFil: Sanna, A.. Università Degli Studi Di Cagliari; ItaliaFil: Strohmayer, T. E.. Nasa Goddard Space Flight Center; Estados UnidosWiley Blackwell Publishing, Inc2023-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/228858Albayati, A. C.; Bult, P.; Altamirano, D.; Chenevez, J.; Guillot, S.; et al.; Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 524; 2; 9-2023; 2477-24880035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stad1892info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/524/2/2477/7205536info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:34:38Zoai:ri.conicet.gov.ar:11336/228858instacron: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:34982025-10-15 15:34:38.526CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807
title Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807
spellingShingle Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807
Albayati, A. C.
STARS: INDIVIDUAL (SWIFT J1749.4-2807)
STARS: NEUTRON
X-RAYS: BINARIES
X-RAYS: BURSTS
title_short Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807
title_full Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807
title_fullStr Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807
title_full_unstemmed Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807
title_sort Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807
dc.creator.none.fl_str_mv Albayati, A. C.
Bult, P.
Altamirano, D.
Chenevez, J.
Guillot, S.
Güver, T.
Jaisawal, G. K.
Malacaria, C.
Mancuso, Giulio Cesare
Marino, A.
Ng, M.
Sanna, A.
Strohmayer, T. E.
author Albayati, A. C.
author_facet Albayati, A. C.
Bult, P.
Altamirano, D.
Chenevez, J.
Guillot, S.
Güver, T.
Jaisawal, G. K.
Malacaria, C.
Mancuso, Giulio Cesare
Marino, A.
Ng, M.
Sanna, A.
Strohmayer, T. E.
author_role author
author2 Bult, P.
Altamirano, D.
Chenevez, J.
Guillot, S.
Güver, T.
Jaisawal, G. K.
Malacaria, C.
Mancuso, Giulio Cesare
Marino, A.
Ng, M.
Sanna, A.
Strohmayer, T. E.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv STARS: INDIVIDUAL (SWIFT J1749.4-2807)
STARS: NEUTRON
X-RAYS: BINARIES
X-RAYS: BURSTS
topic STARS: INDIVIDUAL (SWIFT J1749.4-2807)
STARS: NEUTRON
X-RAYS: BINARIES
X-RAYS: BURSTS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Swift J1749.4-2807 is the only known eclipsing accreting millisecond X-ray pulsar. In this paper, we report on seven thermonuclear (Type-I) X-ray bursts observed by NICER during its 2021 outburst. The first six bursts show slow rises and long decays, indicative of mixed H/He fuel, whereas the last burst shows fast rise and decay, suggesting He-rich fuel. Time-resolved spectroscopy of the bursts revealed typical phenomenology (i.e. an increase in blackbody temperature during the burst rise, and steady decrease in the decay), however, they required a variable NH. We found that the values of NH during the bursts were roughly double those found in the fits of the persistent emission prior to each burst. We interpret this change in absorption as evidence of burst-disc interaction, which we observe due to the high inclination of the system. We searched for burst oscillations during each burst and detected a signal in the first burst at the known spin frequency of the neutron star (517.92 Hz). This is the first time burst oscillations have been detected from Swift J1749.4-2807. We further find that each X-ray burst occurs on top of an elevated persistent count rate. We performed time-resolved spectroscopy on the combined data of the bursts with sufficient statistics (i.e. the clearest examples of this phenomenon) and found that the blackbody parameters evolve to hotter temperatures closer to the onset of the bursts. We interpret this as a consequence of an unusual marginally stable burning process similar to that seen through mHz QPOs.
Fil: Albayati, A. C.. University of Southampton; Reino Unido
Fil: Bult, P.. University of Maryland; Estados Unidos
Fil: Altamirano, D.. University of Southampton; Reino Unido
Fil: Chenevez, J.. Technical University of Denmark; Dinamarca
Fil: Guillot, S.. Cnes Centre National D'etudes Spatiales; Francia
Fil: Güver, T.. Istanbul Üniversitesi; Turquía
Fil: Jaisawal, G. K.. Technical University of Denmark; Dinamarca
Fil: Malacaria, C.. International Space Science Institute; Suiza
Fil: Mancuso, Giulio Cesare. Universidad Nacional de La Plata; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Marino, A.. Instituto de Estudios Espaciales de Cataluña; España
Fil: Ng, M.. MIT Kavli Institute For Astrophysics And Space Research; Estados Unidos
Fil: Sanna, A.. Università Degli Studi Di Cagliari; Italia
Fil: Strohmayer, T. E.. Nasa Goddard Space Flight Center; Estados Unidos
description Swift J1749.4-2807 is the only known eclipsing accreting millisecond X-ray pulsar. In this paper, we report on seven thermonuclear (Type-I) X-ray bursts observed by NICER during its 2021 outburst. The first six bursts show slow rises and long decays, indicative of mixed H/He fuel, whereas the last burst shows fast rise and decay, suggesting He-rich fuel. Time-resolved spectroscopy of the bursts revealed typical phenomenology (i.e. an increase in blackbody temperature during the burst rise, and steady decrease in the decay), however, they required a variable NH. We found that the values of NH during the bursts were roughly double those found in the fits of the persistent emission prior to each burst. We interpret this change in absorption as evidence of burst-disc interaction, which we observe due to the high inclination of the system. We searched for burst oscillations during each burst and detected a signal in the first burst at the known spin frequency of the neutron star (517.92 Hz). This is the first time burst oscillations have been detected from Swift J1749.4-2807. We further find that each X-ray burst occurs on top of an elevated persistent count rate. We performed time-resolved spectroscopy on the combined data of the bursts with sufficient statistics (i.e. the clearest examples of this phenomenon) and found that the blackbody parameters evolve to hotter temperatures closer to the onset of the bursts. We interpret this as a consequence of an unusual marginally stable burning process similar to that seen through mHz QPOs.
publishDate 2023
dc.date.none.fl_str_mv 2023-09
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/11336/228858
Albayati, A. C.; Bult, P.; Altamirano, D.; Chenevez, J.; Guillot, S.; et al.; Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 524; 2; 9-2023; 2477-2488
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/228858
identifier_str_mv Albayati, A. C.; Bult, P.; Altamirano, D.; Chenevez, J.; Guillot, S.; et al.; Thermonuclear type-I X-ray bursts and burst oscillations from the eclipsing AMXP swift J1749.4-2807; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 524; 2; 9-2023; 2477-2488
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stad1892
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/524/2/2477/7205536
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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
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score 13.22299

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