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Discovery of a large-scale clumpy structure of the Lynx supercluster at z∼1.27

Published online by Cambridge University Press:  06 October 2004

Fumiaki Nakata ,
Tadayuki Kodama ,
Kazuhiro Shimasaku ,
Mamoru Doi ,
Hisanori Furusawa ,
Masaru Hamabe ,
Masahiko Kimura ,
Yutaka Komiyama ,
Satoshi Miyazaki  and
Sadanori Okamura
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Fumiaki Nakata
Affiliation:
Department of Physics, University of Durham, South Road, Durham DH1 3LE, UK email: [email protected] National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan Department of Astronomy, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
Tadayuki Kodama
Affiliation:
National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan Department of Astronomy, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
Kazuhiro Shimasaku
Affiliation:
Department of Astronomy, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
Mamoru Doi
Affiliation:
Institute of Astronomy, University of Tokyo, Mitaka, Tokyo 181-1500, Japan
Hisanori Furusawa
Affiliation:
Subaru Telescope, National Astronomical Observatory of Japan, Hilo, HI 96720, USA
Masaru Hamabe
Affiliation:
Department of Mathematical and Physical Sciences, Faculty of Science, Japan Women's University, Bunkyo-ku, Tokyo 112-8681, Japan
Masahiko Kimura
Affiliation:
Department of Astronomy, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
Yutaka Komiyama
Affiliation:
Subaru Telescope, National Astronomical Observatory of Japan, Hilo, HI 96720, USA
Satoshi Miyazaki
Affiliation:
Subaru Telescope, National Astronomical Observatory of Japan, Hilo, HI 96720, USA
Sadanori Okamura
Affiliation:
Department of Astronomy, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
Masami Ouchi
Affiliation:
Department of Astronomy, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
Maki Sekiguchi
Affiliation:
Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
Masafumi Yagi
Affiliation:
National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan
Naoki Yasuda
Affiliation:
Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
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Abstract

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We report the discovery of a probable large-scale structure composed of many galaxy clumps around the known twin clusters at $z=1.26$ and $z=1.27$ in the Lynx region. Our analysis is based on deep, panoramic, and multi-colour imaging with the Suprime-Cam on the 8.2 m Subaru telescope. We apply a photometric redshift technique to extract plausible cluster members at $z\sim1.27$ down to $\sim M^\ast+2.5$. From the 2-D distribution of these photometrically selected galaxies, we newly identify seven candidates of galaxy groups or clusters where the surface density of red galaxies is significantly high ($>$5$\sigma$), in addition to the two known clusters, comprising the largest most distant supercluster ever identified.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUC195 , March 2004 , pp. 29 - 33
Copyright
© 2004 International Astronomical Union