2017MNRAS.467.2234D

Hybrid morphology radio sources (HyMoRS) are a class of radio galaxies having the lobe morphology of a Fanaroff-Riley (FR) type I on one side of the active nucleus and of an FR type II on the other. The origin of the different morphologies between FR I and FR II sources has been widely discussed in the past 40 yr, and HyMoRS may be the best way to understand whether this dichotomy is related to the intrinsic nature of the source and/or to its environment. However, these sources are extremely rare (<=1 per cent of radio galaxies), and only for a few of them, a detailed radio study that goes beyond the morphological classification has been conducted. In this paper, we report the discovery of one new HyMoRS; we present X-ray and multifrequency radio observations. We discuss the source morphological, spectral and polarization properties and confirm that HyMoRS are intrinsically bimodal with respect to these observational characteristics. We notice that HyMoRS classification based just on morphological properties of the source is hazardous.