Near-infrared study of CIZA J1324.7-5736, the second richest cluster of galaxies in the Great Attractor |
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| Authors: | T Nagayama P A Woudt K Wakamatsu S Nishiyama C Nagashima D Kato T Nagata H Nakaya K Sugitani M Tamura S Sato |
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| Institution: | Department of Astrophysics, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan;Department of Astronomy, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan;Department of Astronomy, University of Cape Town, Rondebosch, 7700, South Africa;Faculty of Engineering, Gifu University, Gifu, 501-1193, Japan;Subaru Telescope, National Astronomical Observatory of Japan, Hilo, HI 96720, USA;Graduate School of Natural Science, Nagoya City University, Mizuho-ku, Nagoya 467-8501, Japan;National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8858, Japan |
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| Abstract: | We present the result of a deep near-infrared survey of the newly identified X-ray luminous cluster of galaxies CIZA J1324.7-5736 in the Great Attractor (GA) region. In a 35 × 35 arcmin2 region, 111 galaxy candidates with r Ks 20 > arcsec are identified. Comparison of the extinction-corrected K s -band luminosity function of CIZA J1324.7-5736 with those of nearby clusters indicates that the richness class of CIZA J1324.7-5736 is almost the same as, or richer than, the Pavo, Centaurus and Hydra clusters but poorer than the Coma, Perseus and Norma clusters. CIZA J1324.7-5736 is possibly the second richest cluster in the GA region following the Norma cluster. The position of CIZA J1324.7-5736 in the ( l , b , v ) space] is close to the Centaurus–Crux cluster and the agglomeration of galaxies detected by the Parkes H i survey. CIZA J1324.7-5736, together with the Centaurus–Crux cluster and the H i galaxy agglomeration, is most likely to be one of the richest local concentrations in the GA overdensity of galaxies. |
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| Keywords: | surveys dust extinction galaxies: clusters: general galaxies: clusters: individual: CIZA J1324 7-5736 galaxies: fundamental parameters infrared: galaxies |
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