The viscous disk of GRS 1915-105

Autores
Belloni, Tomaso; Méndez, Mariano R.; King, Andrew J.; Klis, M. van der; Paradijs, J. van
Año de publicación
1999
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
GRS 1915+105, one of the two known galactic microquasars, shows an extremely complex variability in the X-ray band, comparable to no other X-ray source in the sky. Making use of RXTE/PCA data, we have analyzed the X-ray spectral distribution throughout the variability. We find that all variations can be attributed to the rapid appearance and disappearance of the inner region of an optically-thick accretion disk. Since the time scale for each event is related to the maximum radius of the disappearing region, the difference in time structure is due to the time distribution of such radii. The observed relation between the extent of the missing inner region of the disk and the duration of an event is in remarkable agreement with the expected radius dependence of the viscous time scale of the radiation-dominated region of an accretion disk.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Thick disk
Astronomy
Physics
Accretion disc
Scale (ratio)
Event (particle physics)
Time distribution
Time structure
Astrophysics
Sky
Radius
Spectral power distribution
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/122741
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/122741
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling The viscous disk of GRS 1915-105Belloni, TomasoMéndez, Mariano R.King, Andrew J.Klis, M. van derParadijs, J. vanCiencias AstronómicasThick diskAstronomyPhysicsAccretion discScale (ratio)Event (particle physics)Time distributionTime structureAstrophysicsSkyRadiusSpectral power distributionGRS 1915+105, one of the two known galactic microquasars, shows an extremely complex variability in the X-ray band, comparable to no other X-ray source in the sky. Making use of RXTE/PCA data, we have analyzed the X-ray spectral distribution throughout the variability. We find that all variations can be attributed to the rapid appearance and disappearance of the inner region of an optically-thick accretion disk. Since the time scale for each event is related to the maximum radius of the disappearing region, the difference in time structure is due to the time distribution of such radii. The observed relation between the extent of the missing inner region of the disk and the duration of an event is in remarkable agreement with the expected radius dependence of the viscous time scale of the radiation-dominated region of an accretion disk.Facultad de Ciencias Astronómicas y Geofísicas1999info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf330-335http://sedici.unlp.edu.ar/handle/10915/122741enginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0920563298002345?via%3Dihubinfo:eu-repo/semantics/altIdentifier/issn/0920-5632info:eu-repo/semantics/altIdentifier/arxiv/astro-ph/9712232info:eu-repo/semantics/altIdentifier/doi/10.1016/s0920-5632(98)00234-5info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:29:14Zoai:sedici.unlp.edu.ar:10915/122741Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:29:15.011SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The viscous disk of GRS 1915-105
title The viscous disk of GRS 1915-105
spellingShingle The viscous disk of GRS 1915-105
Belloni, Tomaso
Ciencias Astronómicas
Thick disk
Astronomy
Physics
Accretion disc
Scale (ratio)
Event (particle physics)
Time distribution
Time structure
Astrophysics
Sky
Radius
Spectral power distribution
title_short The viscous disk of GRS 1915-105
title_full The viscous disk of GRS 1915-105
title_fullStr The viscous disk of GRS 1915-105
title_full_unstemmed The viscous disk of GRS 1915-105
title_sort The viscous disk of GRS 1915-105
dc.creator.none.fl_str_mv Belloni, Tomaso
Méndez, Mariano R.
King, Andrew J.
Klis, M. van der
Paradijs, J. van
author Belloni, Tomaso
author_facet Belloni, Tomaso
Méndez, Mariano R.
King, Andrew J.
Klis, M. van der
Paradijs, J. van
author_role author
author2 Méndez, Mariano R.
King, Andrew J.
Klis, M. van der
Paradijs, J. van
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Thick disk
Astronomy
Physics
Accretion disc
Scale (ratio)
Event (particle physics)
Time distribution
Time structure
Astrophysics
Sky
Radius
Spectral power distribution
topic Ciencias Astronómicas
Thick disk
Astronomy
Physics
Accretion disc
Scale (ratio)
Event (particle physics)
Time distribution
Time structure
Astrophysics
Sky
Radius
Spectral power distribution
dc.description.none.fl_txt_mv GRS 1915+105, one of the two known galactic microquasars, shows an extremely complex variability in the X-ray band, comparable to no other X-ray source in the sky. Making use of RXTE/PCA data, we have analyzed the X-ray spectral distribution throughout the variability. We find that all variations can be attributed to the rapid appearance and disappearance of the inner region of an optically-thick accretion disk. Since the time scale for each event is related to the maximum radius of the disappearing region, the difference in time structure is due to the time distribution of such radii. The observed relation between the extent of the missing inner region of the disk and the duration of an event is in remarkable agreement with the expected radius dependence of the viscous time scale of the radiation-dominated region of an accretion disk.
Facultad de Ciencias Astronómicas y Geofísicas
description GRS 1915+105, one of the two known galactic microquasars, shows an extremely complex variability in the X-ray band, comparable to no other X-ray source in the sky. Making use of RXTE/PCA data, we have analyzed the X-ray spectral distribution throughout the variability. We find that all variations can be attributed to the rapid appearance and disappearance of the inner region of an optically-thick accretion disk. Since the time scale for each event is related to the maximum radius of the disappearing region, the difference in time structure is due to the time distribution of such radii. The observed relation between the extent of the missing inner region of the disk and the duration of an event is in remarkable agreement with the expected radius dependence of the viscous time scale of the radiation-dominated region of an accretion disk.
publishDate 1999
dc.date.none.fl_str_mv 1999
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/122741
url http://sedici.unlp.edu.ar/handle/10915/122741
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0920563298002345?via%3Dihub
info:eu-repo/semantics/altIdentifier/issn/0920-5632
info:eu-repo/semantics/altIdentifier/arxiv/astro-ph/9712232
info:eu-repo/semantics/altIdentifier/doi/10.1016/s0920-5632(98)00234-5
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
330-335
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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