On the multiwavelength spectrum of the microquasar 1E 1740.7-2942

Autores
Bosch-Ramon, V.; Romero, Gustavo Esteban; Paredes, J. M.; Bazzano, A.; Del Santo, M.; Bassani, L.
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. The microquasar 1E 1740.7-2942 is a source located in the direction of the Galactic Center. It has been detected at X-rays, soft gamma-rays, and in the radio band, showing an extended radio component in the form of a double-sided jet. Although no optical counterpart has been found so far for IE 1740.7-2942, its X-ray activity strongly points to a galactic nature. Aims. We aim to improve our understanding of the hard X-ray and gamma-ray production in the system, exploring whether the jet can emit significantly at high energies under the light of the present knowledge. Methods. We have modeled the source emission, from radio to gamma-rays, with a cold-matter dominated jet model. INTEGRAL data combined with radio and RXTE data, as well as EGRET and HESS upper-limits, are used to compare the computed and the observed spectra. Results. From our modeling, we find out that jet emission cannot explain the high fluxes observed at hard X-rays without violating at the same time the constraints from the radio data, favoring the corona origin of the hard X-rays. Also, 1E 1740.7-2942 might be detected by GLAST or AGILE at GeV energies, and by HESS and HESS-II beyond 100 GeV, with the spectral shape likely affected by photon-photon absorption in the disk and corona photon fields.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Gamma rays: observations
Gamma rays: theory
Stars: individual: 1E 1740.7-2942
Stars: winds, outflows
X-rays: binaries
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:10915/83267

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network_name_str SEDICI (UNLP)
spelling On the multiwavelength spectrum of the microquasar 1E 1740.7-2942Bosch-Ramon, V.Romero, Gustavo EstebanParedes, J. M.Bazzano, A.Del Santo, M.Bassani, L.Ciencias AstronómicasGamma rays: observationsGamma rays: theoryStars: individual: 1E 1740.7-2942Stars: winds, outflowsX-rays: binaries<b>Context.</b> The microquasar 1E 1740.7-2942 is a source located in the direction of the Galactic Center. It has been detected at X-rays, soft gamma-rays, and in the radio band, showing an extended radio component in the form of a double-sided jet. Although no optical counterpart has been found so far for IE 1740.7-2942, its X-ray activity strongly points to a galactic nature. <b>Aims.</b> We aim to improve our understanding of the hard X-ray and gamma-ray production in the system, exploring whether the jet can emit significantly at high energies under the light of the present knowledge. <b>Methods.</b> We have modeled the source emission, from radio to gamma-rays, with a cold-matter dominated jet model. INTEGRAL data combined with radio and RXTE data, as well as EGRET and HESS upper-limits, are used to compare the computed and the observed spectra. <b>Results.</b> From our modeling, we find out that jet emission cannot explain the high fluxes observed at hard X-rays without violating at the same time the constraints from the radio data, favoring the corona origin of the hard X-rays. Also, 1E 1740.7-2942 might be detected by GLAST or AGILE at GeV energies, and by HESS and HESS-II beyond 100 GeV, with the spectral shape likely affected by photon-photon absorption in the disk and corona photon fields.Facultad de Ciencias Astronómicas y Geofísicas2006-08-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1011-1014http://sedici.unlp.edu.ar/handle/10915/83267enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20065469info: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:UNLP2025-09-29T11:15:45Zoai:sedici.unlp.edu.ar:10915/83267Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:46.018SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv On the multiwavelength spectrum of the microquasar 1E 1740.7-2942
title On the multiwavelength spectrum of the microquasar 1E 1740.7-2942
spellingShingle On the multiwavelength spectrum of the microquasar 1E 1740.7-2942
Bosch-Ramon, V.
Ciencias Astronómicas
Gamma rays: observations
Gamma rays: theory
Stars: individual: 1E 1740.7-2942
Stars: winds, outflows
X-rays: binaries
title_short On the multiwavelength spectrum of the microquasar 1E 1740.7-2942
title_full On the multiwavelength spectrum of the microquasar 1E 1740.7-2942
title_fullStr On the multiwavelength spectrum of the microquasar 1E 1740.7-2942
title_full_unstemmed On the multiwavelength spectrum of the microquasar 1E 1740.7-2942
title_sort On the multiwavelength spectrum of the microquasar 1E 1740.7-2942
dc.creator.none.fl_str_mv Bosch-Ramon, V.
Romero, Gustavo Esteban
Paredes, J. M.
Bazzano, A.
Del Santo, M.
Bassani, L.
author Bosch-Ramon, V.
author_facet Bosch-Ramon, V.
Romero, Gustavo Esteban
Paredes, J. M.
Bazzano, A.
Del Santo, M.
Bassani, L.
author_role author
author2 Romero, Gustavo Esteban
Paredes, J. M.
Bazzano, A.
Del Santo, M.
Bassani, L.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Gamma rays: observations
Gamma rays: theory
Stars: individual: 1E 1740.7-2942
Stars: winds, outflows
X-rays: binaries
topic Ciencias Astronómicas
Gamma rays: observations
Gamma rays: theory
Stars: individual: 1E 1740.7-2942
Stars: winds, outflows
X-rays: binaries
dc.description.none.fl_txt_mv <b>Context.</b> The microquasar 1E 1740.7-2942 is a source located in the direction of the Galactic Center. It has been detected at X-rays, soft gamma-rays, and in the radio band, showing an extended radio component in the form of a double-sided jet. Although no optical counterpart has been found so far for IE 1740.7-2942, its X-ray activity strongly points to a galactic nature. <b>Aims.</b> We aim to improve our understanding of the hard X-ray and gamma-ray production in the system, exploring whether the jet can emit significantly at high energies under the light of the present knowledge. <b>Methods.</b> We have modeled the source emission, from radio to gamma-rays, with a cold-matter dominated jet model. INTEGRAL data combined with radio and RXTE data, as well as EGRET and HESS upper-limits, are used to compare the computed and the observed spectra. <b>Results.</b> From our modeling, we find out that jet emission cannot explain the high fluxes observed at hard X-rays without violating at the same time the constraints from the radio data, favoring the corona origin of the hard X-rays. Also, 1E 1740.7-2942 might be detected by GLAST or AGILE at GeV energies, and by HESS and HESS-II beyond 100 GeV, with the spectral shape likely affected by photon-photon absorption in the disk and corona photon fields.
Facultad de Ciencias Astronómicas y Geofísicas
description <b>Context.</b> The microquasar 1E 1740.7-2942 is a source located in the direction of the Galactic Center. It has been detected at X-rays, soft gamma-rays, and in the radio band, showing an extended radio component in the form of a double-sided jet. Although no optical counterpart has been found so far for IE 1740.7-2942, its X-ray activity strongly points to a galactic nature. <b>Aims.</b> We aim to improve our understanding of the hard X-ray and gamma-ray production in the system, exploring whether the jet can emit significantly at high energies under the light of the present knowledge. <b>Methods.</b> We have modeled the source emission, from radio to gamma-rays, with a cold-matter dominated jet model. INTEGRAL data combined with radio and RXTE data, as well as EGRET and HESS upper-limits, are used to compare the computed and the observed spectra. <b>Results.</b> From our modeling, we find out that jet emission cannot explain the high fluxes observed at hard X-rays without violating at the same time the constraints from the radio data, favoring the corona origin of the hard X-rays. Also, 1E 1740.7-2942 might be detected by GLAST or AGILE at GeV energies, and by HESS and HESS-II beyond 100 GeV, with the spectral shape likely affected by photon-photon absorption in the disk and corona photon fields.
publishDate 2006
dc.date.none.fl_str_mv 2006-08-05
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/10915/83267
url http://sedici.unlp.edu.ar/handle/10915/83267
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-6361
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20065469
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
1011-1014
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instname:Universidad Nacional de La Plata
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instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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