On the Nature of the Variable Gamma-Ray Sources at Low Galactic Latitudes

Population studies of EGRET gamma-ray sources indicate that there is a distinctive population of bright sources at low galactic latitudes. The sources have a distribution consistent with that of young galactic objects, with a concentration toward the inner spiral arms. There is a subgroup that displ...

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Detalles Bibliográficos
Autores principales: Bosch-Ramon, Valentí, Romero, Gustavo Esteban, Paredes, Josep M.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2005
Materias:
Astronomía
microquasars
X-ray binaries
jets
gamma-rays
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123743
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123743
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
microquasars
X-ray binaries
jets
gamma-rays
spellingShingle Astronomía
microquasars
X-ray binaries
jets
gamma-rays
Bosch-Ramon, Valentí
Romero, Gustavo Esteban
Paredes, Josep M.
On the Nature of the Variable Gamma-Ray Sources at Low Galactic Latitudes
topic_facet Astronomía
microquasars
X-ray binaries
jets
gamma-rays
description Population studies of EGRET gamma-ray sources indicate that there is a distinctive population of bright sources at low galactic latitudes. The sources have a distribution consistent with that of young galactic objects, with a concentration toward the inner spiral arms. There is a subgroup that displays strong variability with timescales from days to months. Following an earlier suggestion by Kaufman Bernado et al. (2002), we explore the possibility that these sources could be high-mass microquasars. Detailed models for the gamma-ray emission that include inverse Compton interactions of electrons in the relativistic jets and photons from all local fields (stellar UV photons, synchrotron photons, soft X-ray photons from the accretion disk, and hard X-ray photons from a corona) are presented. We conclude that microquasars are excellent candidates for the parent population of the subgroup of variable low-latitude EGRET sources.
format Articulo
Articulo
author Bosch-Ramon, Valentí
Romero, Gustavo Esteban
Paredes, Josep M.
author_facet Bosch-Ramon, Valentí
Romero, Gustavo Esteban
Paredes, Josep M.
author_sort Bosch-Ramon, Valentí
title On the Nature of the Variable Gamma-Ray Sources at Low Galactic Latitudes
title_short On the Nature of the Variable Gamma-Ray Sources at Low Galactic Latitudes
title_full On the Nature of the Variable Gamma-Ray Sources at Low Galactic Latitudes
title_fullStr On the Nature of the Variable Gamma-Ray Sources at Low Galactic Latitudes
title_full_unstemmed On the Nature of the Variable Gamma-Ray Sources at Low Galactic Latitudes
title_sort on the nature of the variable gamma-ray sources at low galactic latitudes
publishDate 2005
url http://sedici.unlp.edu.ar/handle/10915/123743
work_keys_str_mv AT boschramonvalenti onthenatureofthevariablegammaraysourcesatlowgalacticlatitudes
AT romerogustavoesteban onthenatureofthevariablegammaraysourcesatlowgalacticlatitudes
AT paredesjosepm onthenatureofthevariablegammaraysourcesatlowgalacticlatitudes
bdutipo_str Repositorios
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