Oral Presentation

Growth of the brightest cluster galaxy NGC 1275 in the cool-core Perseus cluster

Author(s): Youichi Ohyama (ASIAA), Michael C. H. Yeung, Emily Wong, Jeremy Lim (Hong Kong University, HK)

Presenter: Youichi Ohyama (ASIAA)

NGC 1275 is the brightest cluster galaxy (BCG) in the cool-core Perseus cluster, and hosts an AGN. It shows a powerful radio jet and cavity in X-ray-emitting intra-cluster medium around the jet, and is considered to be a local prototype of radio-mode feedback in action in a theory of cosmological evolution of galaxies. Like many other BCGs within the cool-core clusters (showing reduced cooling flow rate due to re-heating by central AGNs), this galaxy shows distinct properties, such as a spectacular multi-phased filamentary nebula at >50 kpc scale. Its stellar body is also complex, being composed of so-called high-velocity system, central blue spiral, and system of both young and old globular clusters, as well as the main body of the BCG. We will review our recent detailed studies of NGC 1275, and discuss its growth history.