ULTIMATE-Subaru: Enhancing the Subaru's wide-field capability with GLAO

摘要

ULTIMATE-Subaru is a next large facility instrument project at Subaru telescope. We will develop a 14×14arcmin~2 wide-field near-infrared (1.0-2.5μm) imager and a multi-object spectrograph with the aid of a ground-layer adaptive optics system (GLAO), which will uniformly improve the seeing by a factor of 2 over a wide field ofview up to ～20 arcmin in diameter. The expected spatial resolution by the GLAO correction is about 0.2 arcsecFWHM in K-band under moderate seeing conditions at Subaru telescope. ULTIMATE-Subaru will provide aunique capability to realize wide-field and high spatial resolution survey observations in near infrared in the eraof TMT. In this paper, we introduce the project overview including the GLAO and near-infrared instrumentconceptual design. We also describe the future wide-field strategy at Subaru telescope with ULTIMATE-Subarutogether with HSC and PFS.