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.

Variable Very-High-Energy Gamma-Ray Emission from the Microquasar LS I +61 303 / Albert, J., Aliu, E., Anderhub, H., Antoranz, P., Armada, A., Asensio, M., Baixeras, C., Barrio, J.A., Bartelt, M., Bartko, H., Bastieri, D., Bavikadi, S.R., Bednarek, W., Berger, K., Bigongiari, C., Biland, A., Bisesi, E., Bock, R.K., Bordas, P., Bosch Ramon, V., et al.. - In: SCIENCE. - ISSN 0036-8075. - STAMPA. - 312:(2006), pp. 1771-1773. [10.1126/science.1128177]

Variable Very-High-Energy Gamma-Ray Emission from the Microquasar LS I +61 303

LONGO, FRANCESCO;
2006-01-01

Abstract

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2498553
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