Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?

Autores
Grenier, I. A.; Kaufman Bernadó, María Marina; Romero, Gustavo Esteban
Año de publicación
2005
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A subset of the unidentified EGRET γ -ray sources with no active galactic nucleus or other conspicuous counterpart appears to be concentrated at medium latitudes. Their long-term variability and their spatial distribution indicate that they are distinct from the more persistent sources associated with the nearby Gould Belt. They exhibit a large scale height of 1.3 ± 0.6 kpc above the Galactic plane. Potential counterparts for these sources include microquasars accreting from a low-mass star and spewing a continuous jet. Detailed calculations have been performed of the jet inverse Compton emission in the radiation fields from the star, the accretion disc, and a hot corona. Different jet Lorentz factors, powers, and aspect angles have been explored. The up-scattered emission from the corona predominates below 100 MeV whereas the disc and stellar contributions are preponderant at higher energies for moderate (∼15◦) and small (∼1◦) aspect angles, respectively. Yet, unlike in the highmass, brighter versions of these systems, the external Compton emission largely fails to produce the luminosities required for 5 to 10 kpc distant EGRET sources. Synchrotron-self-Compton emission appears as a promising alternative.
Fil: Grenier, I. A.. Université Paris VII & Service d’Astrophysique; Francia
Fil: Kaufman Bernadó, María Marina. 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: Romero, Gustavo Esteban. 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
Materia
X-Ray Binaries
Gamma Ray Observations
Gamma Ray Sources
Unidentified Sources
Microquasars
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:11336/27798
Acceder
id CONICETDig_f20581bf8bcf6174d9478aaf52622b11
oai_identifier_str oai:ri.conicet.gov.ar:11336/27798
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?Grenier, I. A.Kaufman Bernadó, María MarinaRomero, Gustavo EstebanX-Ray BinariesGamma Ray ObservationsGamma Ray SourcesUnidentified SourcesMicroquasarshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A subset of the unidentified EGRET γ -ray sources with no active galactic nucleus or other conspicuous counterpart appears to be concentrated at medium latitudes. Their long-term variability and their spatial distribution indicate that they are distinct from the more persistent sources associated with the nearby Gould Belt. They exhibit a large scale height of 1.3 ± 0.6 kpc above the Galactic plane. Potential counterparts for these sources include microquasars accreting from a low-mass star and spewing a continuous jet. Detailed calculations have been performed of the jet inverse Compton emission in the radiation fields from the star, the accretion disc, and a hot corona. Different jet Lorentz factors, powers, and aspect angles have been explored. The up-scattered emission from the corona predominates below 100 MeV whereas the disc and stellar contributions are preponderant at higher energies for moderate (∼15◦) and small (∼1◦) aspect angles, respectively. Yet, unlike in the highmass, brighter versions of these systems, the external Compton emission largely fails to produce the luminosities required for 5 to 10 kpc distant EGRET sources. Synchrotron-self-Compton emission appears as a promising alternative.Fil: Grenier, I. A.. Université Paris VII & Service d’Astrophysique; FranciaFil: Kaufman Bernadó, María Marina. 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: Romero, Gustavo Esteban. 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; ArgentinaSpringer2005-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/27798Grenier, I. A.; Kaufman Bernadó, María Marina; Romero, Gustavo Esteban; Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?; Springer; Astrophysics And Space Science; 297; 1-4; 6-2005; 109-1180004-640X1572-946XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/s10509-005-7586-xinfo:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s10509-005-7586-xinfo:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/astro-ph/0408215v1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:52:44Zoai:ri.conicet.gov.ar:11336/27798instacron: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:34982025-09-29 09:52:44.962CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?
title Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?
spellingShingle Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?
Grenier, I. A.
X-Ray Binaries
Gamma Ray Observations
Gamma Ray Sources
Unidentified Sources
Microquasars
title_short Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?
title_full Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?
title_fullStr Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?
title_full_unstemmed Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?
title_sort Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?
dc.creator.none.fl_str_mv Grenier, I. A.
Kaufman Bernadó, María Marina
Romero, Gustavo Esteban
author Grenier, I. A.
author_facet Grenier, I. A.
Kaufman Bernadó, María Marina
Romero, Gustavo Esteban
author_role author
author2 Kaufman Bernadó, María Marina
Romero, Gustavo Esteban
author2_role author
author
dc.subject.none.fl_str_mv X-Ray Binaries
Gamma Ray Observations
Gamma Ray Sources
Unidentified Sources
Microquasars
topic X-Ray Binaries
Gamma Ray Observations
Gamma Ray Sources
Unidentified Sources
Microquasars
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A subset of the unidentified EGRET γ -ray sources with no active galactic nucleus or other conspicuous counterpart appears to be concentrated at medium latitudes. Their long-term variability and their spatial distribution indicate that they are distinct from the more persistent sources associated with the nearby Gould Belt. They exhibit a large scale height of 1.3 ± 0.6 kpc above the Galactic plane. Potential counterparts for these sources include microquasars accreting from a low-mass star and spewing a continuous jet. Detailed calculations have been performed of the jet inverse Compton emission in the radiation fields from the star, the accretion disc, and a hot corona. Different jet Lorentz factors, powers, and aspect angles have been explored. The up-scattered emission from the corona predominates below 100 MeV whereas the disc and stellar contributions are preponderant at higher energies for moderate (∼15◦) and small (∼1◦) aspect angles, respectively. Yet, unlike in the highmass, brighter versions of these systems, the external Compton emission largely fails to produce the luminosities required for 5 to 10 kpc distant EGRET sources. Synchrotron-self-Compton emission appears as a promising alternative.
Fil: Grenier, I. A.. Université Paris VII & Service d’Astrophysique; Francia
Fil: Kaufman Bernadó, María Marina. 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: Romero, Gustavo Esteban. 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
description A subset of the unidentified EGRET γ -ray sources with no active galactic nucleus or other conspicuous counterpart appears to be concentrated at medium latitudes. Their long-term variability and their spatial distribution indicate that they are distinct from the more persistent sources associated with the nearby Gould Belt. They exhibit a large scale height of 1.3 ± 0.6 kpc above the Galactic plane. Potential counterparts for these sources include microquasars accreting from a low-mass star and spewing a continuous jet. Detailed calculations have been performed of the jet inverse Compton emission in the radiation fields from the star, the accretion disc, and a hot corona. Different jet Lorentz factors, powers, and aspect angles have been explored. The up-scattered emission from the corona predominates below 100 MeV whereas the disc and stellar contributions are preponderant at higher energies for moderate (∼15◦) and small (∼1◦) aspect angles, respectively. Yet, unlike in the highmass, brighter versions of these systems, the external Compton emission largely fails to produce the luminosities required for 5 to 10 kpc distant EGRET sources. Synchrotron-self-Compton emission appears as a promising alternative.
publishDate 2005
dc.date.none.fl_str_mv 2005-06
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/11336/27798
Grenier, I. A.; Kaufman Bernadó, María Marina; Romero, Gustavo Esteban; Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?; Springer; Astrophysics And Space Science; 297; 1-4; 6-2005; 109-118
0004-640X
1572-946X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/27798
identifier_str_mv Grenier, I. A.; Kaufman Bernadó, María Marina; Romero, Gustavo Esteban; Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?; Springer; Astrophysics And Space Science; 297; 1-4; 6-2005; 109-118
0004-640X
1572-946X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1007/s10509-005-7586-x
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s10509-005-7586-x
info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/astro-ph/0408215v1
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
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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_ 1844613616315138048
score 13.070432

Publicaciones similares