IAR   05382
INSTITUTO ARGENTINO DE RADIOASTRONOMIA
Unidad Ejecutora - UE
artículos
Título:
Variable Very-High-Energy Gamma-Ray Emission from the Microquasar LS I +61 303
Autor/es:
J. ALBERT; G.E ROMERO; AND 146 ADDITIONAL AUTHORS IN ALPHABETICAL ORDER
Revista:
SCIENCE
Editorial:
American Association for the Advancement of Science
Referencias:
Lugar: Washington; Año: 2006 vol. 312 p. 1771 - 1773
ISSN:
0036-8075
Resumen:
Microquasars are binary star systems with relativistic radio-emitting jets. They are potential sources of cosmic rays and can be used to elucidate the physics of relativistic jets. We report the detection of variable gamma-ray emission above 100 gigaelectron volts from the microquasar LS I +61 303. Six orbital cycles were recorded. Several detections occur at a similar orbital phase, which suggests that the emission is periodic. The strongest gamma-ray emission is not observed when the two stars are closest to one another, implying a strong orbital modulation of the emission or absorption processes.