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Astron. Astrophys. 323, 876-880 (1997)

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Particle injection in the Circinus X-1 radio outbursts

J. García-Sánchez 1, 2 and J.M. Paredes 1

1 Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Av. Diagonal 647, E-08028 Barcelona, Spain
2 Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA

Received 17 June 1996 / Accepted 14 January 1997


A particle injection model has been applied to the radio outbursts of the X-ray binary Circinus X-1. The radio outbursts of this system have often been observed to exhibit a double peaked structure, i.e., with two apparent consecutive maxima. We show here that particle injection models can account for such observed behaviour provided that a time variable particle injection rate is adopted. Several possible time dependences are assumed and the corresponding predicted radio light curves compared with multi-frequency observations collected from the literature.

Key words: stars: individual: Cir X-1 – radio continuum: stars – X-rays: stars

Send offprint requests to: J.M. Paredes

© European Southern Observatory (ESO) 1997

Online publication: May 26, 1998