Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105

Autores
Belloni, Tomaso M; Méndez, Mariano; García, Federico; Bhattacharya, Dipankar
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The properties of subsecond time variability of the X-ray emission of the black hole binary GRS 1915 + 105 are very complex and strictly connected to its patterns of variability observed on long time-scales. A key aspect for determining the geometry of the accretion flow is the study of time lags between emission at different energies, as they are associated to key time-scales of the system. In particular, it is important to examine the lags associated to the strong low-frequency quasi-periodic oscillations (QPOs), as the QPOs provide unambiguous special frequencies to sample the variability. We have analysed data from an observation with the AstroSat satellite, in which the frequency of the low-frequency QPO varies smoothly between 2.5 and 6.6 Hz on a time-scale of ∼10 h. The derived phase lags show the same properties and evolution of those observed on time-scales of a few hundred days, indicating that changes in the system geometry can take place on times below one day. We fit selected energy spectra of the source and rms and phase-lag spectra of the QPO with a time-variable Comptonization model, as done previously to RossiXTE data of the same source, and find that indeed the derived parameters match those obtained for variations on much longer time-scales.
Fil: Belloni, Tomaso M. Osservatorio Astronomico Di Brera; Italia
Fil: Méndez, Mariano. University of Groningen; Países Bajos
Fil: García, Federico. 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: Bhattacharya, Dipankar. Inter-university Centre For Astronomy and Astrophysics; India. Ashoka University; India
Materia
ACCRETION, ACCRETION DISCS
BLACK HOLE PHYSICS
RELATIVISTIC PROCESSES
STARS: INDIVIDUAL: GRS 1915 + 105
X-RAYS: BINARIES
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:11336/231316
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/231316
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105Belloni, Tomaso MMéndez, MarianoGarcía, FedericoBhattacharya, DipankarACCRETION, ACCRETION DISCSBLACK HOLE PHYSICSRELATIVISTIC PROCESSESSTARS: INDIVIDUAL: GRS 1915 + 105X-RAYS: BINARIEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The properties of subsecond time variability of the X-ray emission of the black hole binary GRS 1915 + 105 are very complex and strictly connected to its patterns of variability observed on long time-scales. A key aspect for determining the geometry of the accretion flow is the study of time lags between emission at different energies, as they are associated to key time-scales of the system. In particular, it is important to examine the lags associated to the strong low-frequency quasi-periodic oscillations (QPOs), as the QPOs provide unambiguous special frequencies to sample the variability. We have analysed data from an observation with the AstroSat satellite, in which the frequency of the low-frequency QPO varies smoothly between 2.5 and 6.6 Hz on a time-scale of ∼10 h. The derived phase lags show the same properties and evolution of those observed on time-scales of a few hundred days, indicating that changes in the system geometry can take place on times below one day. We fit selected energy spectra of the source and rms and phase-lag spectra of the QPO with a time-variable Comptonization model, as done previously to RossiXTE data of the same source, and find that indeed the derived parameters match those obtained for variations on much longer time-scales.Fil: Belloni, Tomaso M. Osservatorio Astronomico Di Brera; ItaliaFil: Méndez, Mariano. University of Groningen; Países BajosFil: García, Federico. 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: Bhattacharya, Dipankar. Inter-university Centre For Astronomy and Astrophysics; India. Ashoka University; IndiaWiley Blackwell Publishing, Inc2024-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/231316Belloni, Tomaso M; Méndez, Mariano; García, Federico; Bhattacharya, Dipankar; Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 527; 3; 1-2024; 7136-71430035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stad3639info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/527/3/7136/7445011info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:45:56Zoai:ri.conicet.gov.ar:11336/231316instacron: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:34982025-09-03 09:45:56.816CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105
title Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105
spellingShingle Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105
Belloni, Tomaso M
ACCRETION, ACCRETION DISCS
BLACK HOLE PHYSICS
RELATIVISTIC PROCESSES
STARS: INDIVIDUAL: GRS 1915 + 105
X-RAYS: BINARIES
title_short Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105
title_full Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105
title_fullStr Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105
title_full_unstemmed Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105
title_sort Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105
dc.creator.none.fl_str_mv Belloni, Tomaso M
Méndez, Mariano
García, Federico
Bhattacharya, Dipankar
author Belloni, Tomaso M
author_facet Belloni, Tomaso M
Méndez, Mariano
García, Federico
Bhattacharya, Dipankar
author_role author
author2 Méndez, Mariano
García, Federico
Bhattacharya, Dipankar
author2_role author
author
author
dc.subject.none.fl_str_mv ACCRETION, ACCRETION DISCS
BLACK HOLE PHYSICS
RELATIVISTIC PROCESSES
STARS: INDIVIDUAL: GRS 1915 + 105
X-RAYS: BINARIES
topic ACCRETION, ACCRETION DISCS
BLACK HOLE PHYSICS
RELATIVISTIC PROCESSES
STARS: INDIVIDUAL: GRS 1915 + 105
X-RAYS: BINARIES
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The properties of subsecond time variability of the X-ray emission of the black hole binary GRS 1915 + 105 are very complex and strictly connected to its patterns of variability observed on long time-scales. A key aspect for determining the geometry of the accretion flow is the study of time lags between emission at different energies, as they are associated to key time-scales of the system. In particular, it is important to examine the lags associated to the strong low-frequency quasi-periodic oscillations (QPOs), as the QPOs provide unambiguous special frequencies to sample the variability. We have analysed data from an observation with the AstroSat satellite, in which the frequency of the low-frequency QPO varies smoothly between 2.5 and 6.6 Hz on a time-scale of ∼10 h. The derived phase lags show the same properties and evolution of those observed on time-scales of a few hundred days, indicating that changes in the system geometry can take place on times below one day. We fit selected energy spectra of the source and rms and phase-lag spectra of the QPO with a time-variable Comptonization model, as done previously to RossiXTE data of the same source, and find that indeed the derived parameters match those obtained for variations on much longer time-scales.
Fil: Belloni, Tomaso M. Osservatorio Astronomico Di Brera; Italia
Fil: Méndez, Mariano. University of Groningen; Países Bajos
Fil: García, Federico. 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: Bhattacharya, Dipankar. Inter-university Centre For Astronomy and Astrophysics; India. Ashoka University; India
description The properties of subsecond time variability of the X-ray emission of the black hole binary GRS 1915 + 105 are very complex and strictly connected to its patterns of variability observed on long time-scales. A key aspect for determining the geometry of the accretion flow is the study of time lags between emission at different energies, as they are associated to key time-scales of the system. In particular, it is important to examine the lags associated to the strong low-frequency quasi-periodic oscillations (QPOs), as the QPOs provide unambiguous special frequencies to sample the variability. We have analysed data from an observation with the AstroSat satellite, in which the frequency of the low-frequency QPO varies smoothly between 2.5 and 6.6 Hz on a time-scale of ∼10 h. The derived phase lags show the same properties and evolution of those observed on time-scales of a few hundred days, indicating that changes in the system geometry can take place on times below one day. We fit selected energy spectra of the source and rms and phase-lag spectra of the QPO with a time-variable Comptonization model, as done previously to RossiXTE data of the same source, and find that indeed the derived parameters match those obtained for variations on much longer time-scales.
publishDate 2024
dc.date.none.fl_str_mv 2024-01
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/11336/231316
Belloni, Tomaso M; Méndez, Mariano; García, Federico; Bhattacharya, Dipankar; Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 527; 3; 1-2024; 7136-7143
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/231316
identifier_str_mv Belloni, Tomaso M; Méndez, Mariano; García, Federico; Bhattacharya, Dipankar; Fast-varying time lags in the quasi-periodic oscillation in GRS 1915 + 105; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 527; 3; 1-2024; 7136-7143
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/stad3639
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/527/3/7136/7445011
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
_version_ 1842268763636891648
score 13.13397

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