NGC 6185
NGC 6185, also called UGC 10444, is a LINER and spiral galaxy of morphological type Sa. It is at redshift z = 0.034304, equivalent to away, in the constellation of Hercules, and has an apparent B magnitude of 14.5. The galaxy was discovered in April 1827 by British astronomer John Herschel.
Physical properties
NGC 6185 is a massive spiral Sa galaxy in the galaxy cluster Abell 2199. It is across based on an angular diameter of 1.2 arcmin and a distance of away. It has a stellar mass of and is believed to be a starburst galaxy.It has an active galactic nucleus that is also classified as a quasar and is estimated to be extremely bright with a luminosity of. The active galactic nucleus of NGC 6185 is powered by a 600-million- black hole accreting matter that is ejected far beyond the physical galaxy, forming its immense radio lobes. The central black hole mass is high; however, it is expected for giant radio galaxies and is comparable to similar spiral-hosted radio galaxies such as J2345-0449. It is possible that the active galactic nucleus is inactive and the radio structure is a remnant.
In 2016, an ultraluminous X-ray source was discovered in NGC 6185. It was designated CXOU J163317.7+352018 and has an estimated luminosity of 57.9 million.
In 2022, it was found in the LOFAR Two-metre Sky Survey for giants that NGC 6185 generated radio lobes spanning ~2.54 megaparsecs, making it the largest known spiral galaxy-hosted radio galaxy. It greatly surpasses the previous largest spiral radio galaxy, J2345-0449, which has an extent of ~1.63 megaparsecs. The radio structure is a Fanaroff-Riley class II radio galaxy which are edge-brightened and far more luminous than their counterpart, and it is also a double lobed radio galaxy, so it is technically classified as a spiral DRAGN. The total exact length of the radio structure is, comparable to the Local Group and other small galaxy clusters. This estimate is based on an angular diameter of 60 arcmin, which is the second-largest of any GRG.