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Título:	Faint arc-minute extended radio emission around Cygnus X-3
Autor/a:	Sánchez-Sutil, J. R.; Martí Ribas, Josep; Combi, J. A.; Luque-Escamilla, P. L.; Muñoz-Arjonilla, A. J.; Paredes i Poy, Josep Maria; Pooley, G.
Otros autores:	Universitat de Barcelona
Abstract:	Aims.We revisit the vicinity of the microquasar Cygnus X-3 at radio wavelengths. We aim to improve our previous search for possible associated extended radio features/hot spots in the position angle of the Cygnus X-3 relativistic jets focusing on shorter angular scales than previously explored. Methods.Our work is mostly based on analyzing modern survey and archive radio data, mainly including observations carried out with the Very Large Array and the Ryle Telescopes. We also used deep near-infrared images that we obtained in 2005. Results.We present new radio maps of the Cygnus X-3 field computed after combining multi-configuration Very Large Array archive data at 6 cm and different observing runs at 2 cm with the Ryle Telescope. These are probably among the deepest radio images of Cygnus X-3 reported to date at cm wavelengths. Both interferometers reveal an extended radio feature within a few arc-minutes of the microquasar position, thus making our detection more credible. Moreover, this extended emission is possibly non-thermal, although this point still needs confirmation. Its physical connection with the microquasar is tentatively considered under different physical scenarios. We also report on the serendipitous discovery of a likely Fanaroff-Riley type II radio galaxy only away from Cygnus X-3.
Materia(s):	-Quàsars -Estels binaris de raigs X -Radioastronomia -Astrofísica -Quasars -X-ray binaries -Radio astronomy -Astrophysics
Derechos:	(c) Springer Verlag, 2008
Tipo de documento:	Artículo Artículo - Versión aceptada
Editor:	Springer Verlag
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