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My name is Jun Toshikawa. I am a postdoctoral researcher in Optical and Infrared Division at National Astronomical Observatory of Japan (NAOJ). My research interests include galaxy evolution in high dense environment and formation of large-scale structure. I am presently working on search for protoclusters beyond z~3 by using wide-field imaging of the Hyper Suprime-Cam (HSC). The HSC survey will provide large sample of protoclusters, allowing us address how galaxies assemble and when environmental effects start to affect galaxy evolution.

In our previous researches, we discovered a protocluster at z=6.01 in the Subaru Deep Field, which is the highest-redshift protocluster known to date with sufficient spectroscopic confirmation (press release). The picture shows the central region of the protocluster and marks z~6 galaxies with circles. Currently, I mainly use the Subaru telescope, and I would like to use other telescopes — e.g., the HST and ALMA.

Contact Information
Email: jun.toshikawa "at" nao.ac.jp
Office: Room 528, Subaru building 2F,
National Astronomical Observatory of Japan

Last updated: 15 May 2015