Oral Presentation

Optically-detected clusters of galaxies in the AKARI North Ecliptic Pole field

Author(s): Ting-Chi Huang (SOKENDAI)

Presenter: Ting-Chi Huang (SOKENDAI/ISAS)

A cluster of galaxies is a very important and fundamental astronomical object for studying galaxy evolution and cosmology. However, the search of galaxy clusters in the AKARI North Ecliptic Pole (NEP) field has been limited. In this work, we provide a useful cluster finding method based on the galaxy local density and the friends-of-friends algorithm. As a result, 91 cluster candidates have been selected in the AKARI NEP field. Many cluster candidates show a clear galaxy red sequence in the color-magnitude diagram. Through our method, we also identified the X-ray clusters previously observed by ROSAT and Chandra. Additionally, the reliability of our method has been examined by false detection tests and completeness analyses.