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We report on new VLA radio observations performed at 1.4 GHz and 4.8 GHz withunprecedented sensitivity and angular resolution (~1 arcsec) of the cool corecluster A 2626, which is known to possess a radio mini-halo at its center. Themost unusual features of A 2626 are two elongated radio features detected inprevious observations to the north and south, having morphologies not common tothe typical jet-lobe structures in cool cores. In our new sensitive images thetwo elongated features appears clearly as bright radio arcs, and we discoverthe presence of a new arc to the west. These radio arcs are not detected at 4.8GHz, implying a steep (alpha >1) spectrum, and their origin is puzzling. Aftersubtracting the flux density contributed by these discrete features from thetotal flux measured at low resolution, we estimate a residual 18.0 +/- 1.8 mJyflux density of diffuse radio emission at 1.4 GHz. We therefore confirm thedetection of diffuse radio emission, which appears distinct from the discreteradio arcs embedded in it. Although its radio power is lower (1.4x10^23 W/Hz)than previously known, the diffuse emission may still be classified as a radiomini-halo.

The puzzling radio source in the cool core cluster A 2626