EDP Sciences
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Volume 439, Number 1, August III 2005
Page(s) 279 - 285
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361:20053041

A&A 439, 279-285 (2005)
DOI: 10.1051/0004-6361:20053041

Possible hot spots excited by the relativistic jets of Cygnus X-3

J. Martí1, D. Pérez-Ramírez1, J. L. Garrido1, P. Luque-Escamilla2 and J. M. Paredes3

1  Departamento de Física, EPS, Universidad de Jaén, Campus Las Lagunillas s/n, Edif. A3, 23071 Jaén, Spain
    e-mail: [jmarti;dperez;jlg]@ujaen.es
2  Dpto. de Ing. Mecánica y Minera, EPS, Universidad de Jaén, Campus Las Lagunillas s/n, Edif. A3, 23071 Jaén, Spain
    e-mail: peter@ujaen.es
3  Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Av. Diagonal 647, 08028 Barcelona, Spain
    e-mail: jmparedes@ub.edu

(Received 10 March 2005 / Accepted 27 April 2005)

We present the results of a deep search for associated radio features in the vicinity of the microquasar Cygnus X-3. The motivation behind is to find out evidence for interaction between its relativistic jets and the surrounding interstellar medium, which could eventually allow us to perform calorimetry of the total energy released by this microquasar during its flaring lifetime. Remarkably, two radio sources with mJy emission level at centimeter wavelengths have been detected in excellent alignment with the position angle of the inner radio jets. We propose that these objects could be the hot spots where the relativitic outflow collides with the ambient gas in analogy with Fanaroff-Riley II radio galaxies. These candidate hot spots are within a few arc-minutes of Cygnus X-3 and, if physically related, the full linear extent of the jet would reach tens of parsecs. We discuss here the evidence currently available to support this hypothesis based on both archival data and our own observations.

Key words: stars: individual: Cygnus X-3 -- radio continuum: stars -- X-rays: binaries

SIMBAD Objects

© ESO 2005