Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2010-03-22
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
8 pages, 7 figures. Invited review at the "7th Agile Meeting and The Bright Gamma-Ray Sky", held in Frascati, Italy, 29 Septem
Scientific paper
Cygnus X-3 is a unique microquasar. Its X-ray emission shows a very strong 4.8-hour orbital modulation. But its mass-donating companion is a Wolf-Rayet star. Also unlike most other X-ray binaries Cygnus X-3 is relatively bright in the radio virtually all of the time (the exceptions being the quenched states). Cygnus X-3 also undergoes giant radio outbursts (up to 20 Jy). In this presentation we discuss and review the flaring behavior of Cygnus X-3 and its various radio/X-ray states. We present a revised set of radio/X-ray states based on Cygnus X-3's hardness-intensity diagram (HID). We also examine the connection of a certain type of activity to the reported AGILE/Fermi gamma-ray detections of Cygnus X-3.
Hannikainen Diana Carina
Koljonen K. I. I.
McCollough Michael L.
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