Goldfish galaxy

The Goldfish galaxy is classified as an elliptical galaxy with an active galactic nucleus (AGN).^[3] It is a head-tail radio galaxy^[4] or alternatively a Fanaroff-Riley class type I narrow-tailed radio galaxy.^[6][7] When observed, it is found to have a weak tail feature. The head feature on the other hand, is shown little polarized by around 4%.^[4]

Radio imaging made at 1.4 GHz frequencies has found the head of the Goldfish galaxy as clearly resolved with two radio jets on opposite sides, one of them displaying a bend degree towards the east. A compact radio core is detected at 5 GHz frequencies. When imaged at 15 GHz, the nucleus and only the part of the northern jet is found.^[7] The tail feature of the Goldfish galaxy is shown to have an total extension of 261 kiloparsecs and further extended by around 180 kiloparsecs towards the direction of southeast.^[8] Earlier observations depicted the nucleus as unresolved.^[9]

Further observations at sub-arcsecond resolutions have detected traces of radio emission emitting out from the tail region of the Goldfish galaxy. Evidence also found the tail exhibits a helical morphology with jets appearing to spiral around each other before merging back into a single tail feature. A region of increased surface brightness is detected about 170 kiloparsecs away from the core region.^[6]

• Goldfish galaxy on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• Goldfish galaxy on SIMBAD