On May 31, 2007, Prof. Takashi Ichikawa from Tohoku University presented news from Subaru's Multi-Object Infrared Camera and Spectrograph (MOIRCS) to a group of press and media people at the `Imiloa Astronomy Centre of Hawai`i. It was the last day of the 210th meeting of the American Astronomical Society (AAS) being held in Honolulu, and the group was gathered to hear about recent developments from observatories before heading for a visit to the summit of Maunakea.
Prof. Takashi Ichikawa highlighted features of MOIRCS that make it one of the most advanced and powerful instruments for current 8-10 metre ground-based telescopes. It has the widest field of view (4 arc-minutes x 7 arc-minutes) of all the infrared instruments in the world, and also has an efficient infrared multi-object spectrograph that can observe more than 50 objects at one time. MOIRCS is the first instrument to provide this capability with cooled multi object slits in infrared wavelengths. The instrument has been in open for general use at the Subaru telescope since February 2006. Potential scientific targets for MOIRCS cover various objects: nearby star and planet forming regions to the furthest reach of the universe. The MOIRCS team, led by Prof. Ichikawa, is now undertaking the MOIRCS Deep Survey (MODS), the deepest and widest imaging observations in the GOODS-North region, which covers a wide area that includes the Hubble Deep Field (HDF). They are searching for distant galaxies 10 to 12 billion light years away from us. They are also taking spectra of galaxies detected in the MODS project with the multi-object spectrograph. Spectroscopy of the galaxies will enable them to make a 3-D map of distant galaxies and to understand the nature of star formation in massive galaxies 10 to 12 billion years ago.
Scientists at the University of Tokyo, University of Kyoto, National Astronomical Observatory of Japan, and the University of Hawaii teamed up to obtain the deepest infrared image of an almost empty field in the sky near the celestial pole.
Using Subaru's Adaptive Optics system (AO) and Infrared Camera and Spectrograph (IRCS), they observed the "Subaru Deep Field", an area of the sky well suited for studying the origin and evolution of galaxies. They achieved twice the sensitivity of previous observations at the infrared wavelength of 2.12 micrometers. Thanks to AO technology, the spatial resolution of their data is better than Hubble Space Telescope's at this wavelength, clearly revealing the shapes of distant galaxies.