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Discovery of a High-Energy Gamma-Ray-Emitting Persistent Microquasar
Josep M. Paredes,1*
Josep Martí,2
Marc Ribó,1
Maria Massi3
Microquasars are stellar x-ray binaries that behave as a
scaled-down version of extragalactic quasars. The star LS 5039 isa new
microquasar system with apparent persistent ejection ofrelativistic
plasma at a 3-kiloparsec distance from the sun. Itmay also be
associated with a -ray source discovered by the EnergeticGamma Ray
Experiment Telescope (EGRET) on board the COMPTON-GammaRay Observatory satellite. Before the discovery of LS 5039, merelya
handful of microquasars had been identified in the Galaxy, andnone of
them was detected in high-energy -rays.
1 Departament d'Astronomia i Meteorologia,
Universitat de Barcelona, Av. Diagonal 647, E-08028 Barcelona, Spain.
2 Departamento de Física, Escuela
Politécnica Superior, Universidad de Jaén, Calle Virgen de
la Cabeza 2, E-23071 Jaén, Spain.
3 Max Planck
Institut für Radioastronomie, Auf dem Hügel 69, D-53121
Bonn, Germany.
*
To whom correspondence should be addressed. E-mail:
josepmp{at}am.ub.es
The editors suggest the following Related Resources on Science sites:
In Science Magazine
PERSPECTIVES
R. P. Fender (30 June 2000) Science288 (5475), 2326.
[DOI: 10.1126/science.288.5475.2326] |Summary »|Full Text »
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-ray source discovered by the Energetic Gamma Ray
Experiment Telescope (EGRET) on board the COMPTON-Gamma Ray Observatory satellite. Before the discovery of LS 5039, merely a
handful of microquasars had been identified in the Galaxy, and none of
them was detected in high-energy 
