High-mass microquasars and low-latitude gamma-ray sources

Population studies of unidentified EGRET sources suggest that there exist at least three different populations of galactic gamma-ray sources. One of these populations is formed by young objects distributed along the galactic plane with a strong concentration toward the inner spiral arms of the Galax...

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Detalles Bibliográficos
Autores principales: Bosch Ramon, V., Romero, Gustavo Esteban, Paredes, J. M.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2005
Materias:
Ciencias Astronómicas
Gamma-rays: observations
Gamma-rays: theory
Stars: winds, outflows
X-rays: binaries
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84320
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84320
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Gamma-rays: observations
Gamma-rays: theory
Stars: winds, outflows
X-rays: binaries
spellingShingle Ciencias Astronómicas
Gamma-rays: observations
Gamma-rays: theory
Stars: winds, outflows
X-rays: binaries
Bosch Ramon, V.
Romero, Gustavo Esteban
Paredes, J. M.
High-mass microquasars and low-latitude gamma-ray sources
topic_facet Ciencias Astronómicas
Gamma-rays: observations
Gamma-rays: theory
Stars: winds, outflows
X-rays: binaries
description Population studies of unidentified EGRET sources suggest that there exist at least three different populations of galactic gamma-ray sources. One of these populations is formed by young objects distributed along the galactic plane with a strong concentration toward the inner spiral arms of the Galaxy. Variability, spectral and correlation analysis indicate that this population is not homogeneous. In particular, there is a subgroup of sources that display clear variability in their gamma-ray fluxes on timescales from days to months. Following the proposal by Kaufman Bernadó et al. (2002), we suggest that this group of sources might be high-mass microquasars, i.e. accreting black holes or neutron stars with relativistic jets and early-type stellar companions. We present detailed inhomogeneous models for the gamma-ray emission of these systems that include both external and synchrotron self-Compton interactions. We have included effects of interactions between the jet and all external photon fields to which it is exposed: companion star, accretion disk, and hot corona. We make broadband calculations to predict the spectral energy distribution of the emission produced in the inner jet of these objects up to GeV energies. The results and predictions can be tested by present and future gamma-ray instruments like INTEGRAL, AGILE, and GLAST.
format Articulo
Articulo
author Bosch Ramon, V.
Romero, Gustavo Esteban
Paredes, J. M.
author_facet Bosch Ramon, V.
Romero, Gustavo Esteban
Paredes, J. M.
author_sort Bosch Ramon, V.
title High-mass microquasars and low-latitude gamma-ray sources
title_short High-mass microquasars and low-latitude gamma-ray sources
title_full High-mass microquasars and low-latitude gamma-ray sources
title_fullStr High-mass microquasars and low-latitude gamma-ray sources
title_full_unstemmed High-mass microquasars and low-latitude gamma-ray sources
title_sort high-mass microquasars and low-latitude gamma-ray sources
publishDate 2005
url http://sedici.unlp.edu.ar/handle/10915/84320
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AT romerogustavoesteban highmassmicroquasarsandlowlatitudegammaraysources
AT paredesjm highmassmicroquasarsandlowlatitudegammaraysources
bdutipo_str Repositorios
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