We show an outline of a new project named Tokyo Atacama Observatory (TAO) to build a 6.5-m infrared optimized telescope in the Atacama area in northern Chile. Our recent activities on the project, including site-testing studies in these three years, are also presented.Due to the high elevation of the site, that is 5000 -- 5600 m, TAO can provide almost continuous accessibility in infrared wavelengths, which enables us to make almost seamless spectroscopic observations of red objects, such as high redshift galaxies, QSOs, brown dwarfs, circumstellar dust clouds and young stellar objects. Major scientific targets of TAO will include determining the age of the universe using the FeII/MgII line ratio of QSOs at various redshift ranges. Besides IR instruments a wide-field optical instrument will be also be installed to make various survey studies. We have installed a weather monitor station in the Atacama area since September 2001. Univ. of Tokyo and Univ. of Chile are ready to make basic agreements to make collaborative studies for the project. With several universities and institutes in Japan we start to make various levels of collaboration, from instrumentation to science.
8th Asian-Pacific Regional Meeting, Volume II
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