2MASX J22550681+0058396

2MASX J22550681+0058396 or known as PGC 1180817, is a type E-S0 lenticular galaxy located in constellation Pisces. It is located 733 million light-years from the Solar System and has an approximate diameter of 95,000 light-years.

Characteristics
2MASX J22550681+0058396 has an active galactic nucleus (AGN). It is a LINER galaxy whose nucleus presents an emission spectrum characterized by broad lines of weak ion atoms. This is an interesting object since not only it represents the most numerous active galactic nuclei population but the link between normal and active galaxies suggested by low-X-ray luminosity.

Moreover, 2MASX J22550681+0058396 is a post-starburst galaxy which is caused by end product of galaxies that have merged within the past billion years. The merger event had caused the gas to drive up to the center and created an abundance of new stars, of which the brightest are visible in the remanent galaxy's core. This might be due to burst duration increasing with stellar mass, from 120 to 250 Myr, indicating there is enough molecular gas available in close pairs to fuel the burst.

Visible shells and tails surrounding 2MASX J22550681+0058396, are also caused in which the shells are formed through radial merger events while tails are remnants of circular merger infall, suggesting that the orbital angular momentum plays a more crucial role in transforming the host galaxy as expected.