Correlated X-ray and very high energy emission in the gamma-ray binary LS I+61 303

The discovery of very high energy (VHE) gamma-ray emitting X-ray binaries has triggered an intense effort to better understand the particle acceleration, absorption, and emission mechanisms in compact binary systems, which provide variable conditions along eccentric orbits. Despite this, the nature...

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Detalles Bibliográficos
Autores: Antoranz Canales, Pedro, Barrio Uña, Juan Abel, Contreras González, José Luis, Fonseca González, María Victoria, Miranda Pantoja, José Miguel, Nieto Castaño, Daniel
Tipo de recurso: artículo
Fecha de publicación:2009
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/43935
Acceso en línea:https://hdl.handle.net/20.500.14352/43935
Access Level:acceso abierto
Palabra clave:537
539.1
Microquasar LS-I+61-303
Star LSI+61-Degrees-303
Magic Telescope
H-Alpha
Radio
I+61-Degrees-303
LS-I-+61-303
Peculiar
Spectrum
Veritas.
Electrónica (Física)
Electricidad
Física nuclear
2202.03 Electricidad
2207 Física Atómica y Nuclear
id ES_ca24f208f18b15eae7dc7f4452e5bf7d
oai_identifier_str oai:docta.ucm.es:20.500.14352/43935
network_acronym_str ES
network_name_str España
repository_id_str
spelling Correlated X-ray and very high energy emission in the gamma-ray binary LS I+61 303Antoranz Canales, PedroBarrio Uña, Juan AbelContreras González, José LuisFonseca González, María VictoriaMiranda Pantoja, José MiguelNieto Castaño, Daniel537539.1Microquasar LS-I+61-303Star LSI+61-Degrees-303Magic TelescopeH-AlphaRadioI+61-Degrees-303LS-I-+61-303PeculiarSpectrumVeritas.Electrónica (Física)ElectricidadFísica nuclear2202.03 Electricidad2207 Física Atómica y NuclearThe discovery of very high energy (VHE) gamma-ray emitting X-ray binaries has triggered an intense effort to better understand the particle acceleration, absorption, and emission mechanisms in compact binary systems, which provide variable conditions along eccentric orbits. Despite this, the nature of some of these systems, and of the accelerated particles producing the VHE emission, is unclear. To answer some of these open questions, we conducted a multiwavelength campaign of the VHE gamma-ray emitting X-ray binary LS I +61 303 including the MAGIC telescope, XMM-Newton, and Swift during 60% of an orbit in 2007 September. We detect a simultaneous outburst at X-ray and VHE bands, with the peak at phase 0.62 and a similar shape at both wavelengths. A linear fit to the simultaneous X-ray/VHE pairs obtained during the outburst yields a correlation coefficient of r = 0.97, while a linear fit to all simultaneous pairs provides r = 0.81. Since a variable absorption of the VHE emission towards the observer is not expected for the data reported here, the correlation found indicates a simultaneity in the emission processes. Assuming that they are dominated by a single particle population, either hadronic or leptonic, the X-ray/VHE flux ratio favors leptonic models. This fact, together with the detected photon indices, suggests that in LS I +61 303 the X-rays are the result of synchrotron radiation of the same electrons that produce VHE emission as a result of inverse Compton scattering of stellar photons.IOP PublishingUniversidad Complutense de Madrid20092009-11-2020092009-11-20journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/43935reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/439352026-06-02T12:44:21Z
dc.title.none.fl_str_mv Correlated X-ray and very high energy emission in the gamma-ray binary LS I+61 303
title Correlated X-ray and very high energy emission in the gamma-ray binary LS I+61 303
spellingShingle Correlated X-ray and very high energy emission in the gamma-ray binary LS I+61 303
Antoranz Canales, Pedro
537
539.1
Microquasar LS-I+61-303
Star LSI+61-Degrees-303
Magic Telescope
H-Alpha
Radio
I+61-Degrees-303
LS-I-+61-303
Peculiar
Spectrum
Veritas.
Electrónica (Física)
Electricidad
Física nuclear
2202.03 Electricidad
2207 Física Atómica y Nuclear
title_short Correlated X-ray and very high energy emission in the gamma-ray binary LS I+61 303
title_full Correlated X-ray and very high energy emission in the gamma-ray binary LS I+61 303
title_fullStr Correlated X-ray and very high energy emission in the gamma-ray binary LS I+61 303
title_full_unstemmed Correlated X-ray and very high energy emission in the gamma-ray binary LS I+61 303
title_sort Correlated X-ray and very high energy emission in the gamma-ray binary LS I+61 303
dc.creator.none.fl_str_mv Antoranz Canales, Pedro
Barrio Uña, Juan Abel
Contreras González, José Luis
Fonseca González, María Victoria
Miranda Pantoja, José Miguel
Nieto Castaño, Daniel
author Antoranz Canales, Pedro
author_facet Antoranz Canales, Pedro
Barrio Uña, Juan Abel
Contreras González, José Luis
Fonseca González, María Victoria
Miranda Pantoja, José Miguel
Nieto Castaño, Daniel
author_role author
author2 Barrio Uña, Juan Abel
Contreras González, José Luis
Fonseca González, María Victoria
Miranda Pantoja, José Miguel
Nieto Castaño, Daniel
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 537
539.1
Microquasar LS-I+61-303
Star LSI+61-Degrees-303
Magic Telescope
H-Alpha
Radio
I+61-Degrees-303
LS-I-+61-303
Peculiar
Spectrum
Veritas.
Electrónica (Física)
Electricidad
Física nuclear
2202.03 Electricidad
2207 Física Atómica y Nuclear
topic 537
539.1
Microquasar LS-I+61-303
Star LSI+61-Degrees-303
Magic Telescope
H-Alpha
Radio
I+61-Degrees-303
LS-I-+61-303
Peculiar
Spectrum
Veritas.
Electrónica (Física)
Electricidad
Física nuclear
2202.03 Electricidad
2207 Física Atómica y Nuclear
description The discovery of very high energy (VHE) gamma-ray emitting X-ray binaries has triggered an intense effort to better understand the particle acceleration, absorption, and emission mechanisms in compact binary systems, which provide variable conditions along eccentric orbits. Despite this, the nature of some of these systems, and of the accelerated particles producing the VHE emission, is unclear. To answer some of these open questions, we conducted a multiwavelength campaign of the VHE gamma-ray emitting X-ray binary LS I +61 303 including the MAGIC telescope, XMM-Newton, and Swift during 60% of an orbit in 2007 September. We detect a simultaneous outburst at X-ray and VHE bands, with the peak at phase 0.62 and a similar shape at both wavelengths. A linear fit to the simultaneous X-ray/VHE pairs obtained during the outburst yields a correlation coefficient of r = 0.97, while a linear fit to all simultaneous pairs provides r = 0.81. Since a variable absorption of the VHE emission towards the observer is not expected for the data reported here, the correlation found indicates a simultaneity in the emission processes. Assuming that they are dominated by a single particle population, either hadronic or leptonic, the X-ray/VHE flux ratio favors leptonic models. This fact, together with the detected photon indices, suggests that in LS I +61 303 the X-rays are the result of synchrotron radiation of the same electrons that produce VHE emission as a result of inverse Compton scattering of stellar photons.
publishDate 2009
dc.date.none.fl_str_mv 2009
2009-11-20
2009
2009-11-20
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/43935
url https://hdl.handle.net/20.500.14352/43935
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869419453985325056
score 15,301603

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