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We report the discovery of a very unusual, predominantly one-sided radiogalaxy CGCG049-033. Its radio jet, the largest detected so far, emits stronglypolarized synchrotron radiation and can be traced all the way from the galacticnucleus to the hot spot located ~440 kpc away. This jet emanates from anextremely massive black-hole (mass > 10^9 times solar mass) and forms astrikingly compact radio lobe. To a surface brightness contrast of at least 20no radio lobe is detected on the side of the counter-jet, which is similar tothe main jet in brightness upto the scale of tens of kpc. Thus, contrary to thenearly universal trend, the brightness asymmetry in this radio galaxy increaseswith distance from the nucleus. With several unusual properties, including apredominantly toroidal magnetic field, this Fanaroff-Riley type II (FR-II)mega-jet is an exceptionally useful laboratory for testing the role of magneticfield in jet stabilization and radio lobe formation.

A giant radio jet of very unusual polarization in a single-lobed radio galaxy