ULTIMATE-SUBARU	

Subaru Next-gen AO working Group 	

Presentation by Yusei Koyama (Subaru Telescope/NAOJ)	

Subaru next-gen AO working group + Collaborators	

• Subaru / NAOJ: Yutaka Hayano, Shin Oya, Yosuke Minowa,
Tadayuki Kodama, Nobuo Arimoto, Takashi Hattori, Olivier
Lai, Hideki Takami, Naruhisa Takato, Ichi Tanaka, Yusei Koyama	• Japanese Univ.: Masayuki Akiyama, Yoshito Ono (Tohoku Univ.),
Kentaro Motohara (Univ. of Tokyo)	

• NRC Canada: Alan McConnachie, Luc Simard, David Anderson,John Pazder, David Crampton, et al.	

• Australian Astronomical Observatory / University of Sydney: AndrewSheinis, Chris Lidman, John Lawrence, Andrew Hopkins, et al.	

• ASIAA Taiwan: Shiang-Yu Wang, Wei-Hao Wang, et al.	

ULTIMATE-SUBARU 	= Adaptive M2 + New IR Instruments	

• Adaptive Secondary Mirror	• Seeing Improvement (about 1/2 image size)	

• >10arcmin Field-of-View at Cassegrain	• http://www.naoj.org/Projects/newdev/ngao/	• New Wide-field Near-IR Instrument(s)	

(Mainly for “bright” nights: HSC & PFS are for “Dark” nights)	

• Incremental Development of instrument(s)and GLAO	• Expected start science observations
around beginning of 2020s	

ULTRA-WIDE-FIELD LASER TOMOGRAPHIC
IMAGER and MOS with AO for TRANSCENDENTEXPLORATION by SUBARU TELESCOPE.	

ULTIMATE key specifications: Ground-Layer AO	ULTIMATE key specifications: Ground-Layer AO	

Field of View	

15 arcmin	

Focus	

Cassegrain	

Corrector	

Adaptive secondary, 33 actuators
across the diameter	

Sky Coverage	

Almost all sky	

FWHMs at ‘Moderate’ condition	

GLAO	

Natural	K-band	0.20”	

0.44”	

H-band	0.23”	

0.49”	

J-band	0.27”	

0.51”	

R-band	0.41”	

0.65”	

New IR Instruments under Discussion	

1. Wide-field Imager	

2. Multi-Object Integral Field Spectrograph	

3. Multi-Slit Spectrograph	Possibility-1 : Wide-field Imager	Wavelength coverage	

0.8-2.5um	

Plate scale	0.10”/pix (TBD)	

1pix=15um	

FoV	

4 x 6.8’ x 6.8’ (TBD)	

Separation of 4 areas TBD	Detectors	

4 H4RGs (4k x 4k)	

Possibility-2 : 	

Multi-Object Integral-Field Spectrograph	

Phase 1	Phase 2	Number of Fibres per Bundle	

Spatial Sampling	

Bundle Sky Diameter	

Number of Bundles	

Field of View	

Spectral Resolution	

Detectors	

Wavelength Coverage	

61	

0.2 arcsec/fibre	

1.8 arcsec	

16	

6’ → 13’	~3,000	

2 x H2RG	

0.9 - 2.0μm	

Number of Bundles	

>32	

Field of View	

13’	Detectors	

2 x H4RG? (TBD)	

Primary Science Goals	

• Complete Census of Galaxy Evolution	• ‘Cosmic Noon’ (1<z<3)	

• Galaxy Anatomy	

• Exploring Very High-Redshift Universe	• ‘Cosmic Dawn’ (z>7)	

Primary Science Goals	

• Complete Census of Galaxy Evolution	• ‘Cosmic Noon’ (1<z<3)	

• Galaxy Anatomy	

• Exploring Very High-Redshift Universe	• ‘Cosmic Dawn’ (z>7)	

z=7.7	 z=10.0	 z=11.8	

Primary Science Goals	

• Complete Census of Galaxy Evolution	• ‘Cosmic Noon’ (1<z<3)	

• Galaxy Anatomy	

• Exploring Very High-Redshift Universe	• ‘Cosmic Dawn’ (z>7)	

SINS survey (Foster-Schreiber 2011)

z=7.7	 z=10.0	 z=11.8	

ULTIMATE-SUBARU Study Report 2015	

• 3 years since Study Report 2012. 	

• SR2012 focused on “Which AO is bestfor Subaru”. 	

• Many discussion on new instrument
plans with international collaboration.	

• Most important topic now is “whichinstrument is best for Subaru/GLAO
and for our community” (mainly fromscientific point of views). 	

ULTIMATE Study Report (2012) 	

http://www.naoj.org/Projects/newdev/ngao/	

• We expect completion of Study Report
before Christmas time, and external
review in early 2016. 	

ULTIMATE-Subaru Study Report 2015
Science Authors (as of Sep 14th 2015)	

• High-z galaxy team: Masayuki Akiyama, Masao Hayashi, Ikuru
Iwata, Tadayuki Kodama, Kotaro Kohno, Yusei Koyama, Chris
Lidman (AAO), Yuichi Matsuda, Yosuke Minowa, Takatoshi
Shibuya, Ken-ichi Tadaki	• Low-z galaxy & Galactic team: Masatoshi Imanishi, Daisuke Iono,Yusei Koyama, Kentaro Motohara, Jin Koda, Shogo Nishiyama	ULTIMATE-SUBARU: Strengths	

• Maunakea is an Excellent site for GLAO	• ‘Telescope Upgrade’ - x2 Spatial resolution, x2 Sensitivity	

• ASM benefits to all instruments, including ExAO	• Attractive to External Instrument Developers	

• Well Aligned to Wide-Field Strategy of Subaru	

• Incremental instrument development plan	• GLAO assisted >10’ Capability is Unique in 8-10m Telescopes	

• Strong Synergy with TMT	ULTIMATE-SUBARU: Challenges	

• Funding	• GLAO >$20M - ‘Telescope Upgrade’ after PFS?	

• Instruments - need external funds 	

• Developers / Collaborations	• Discussion with Foreign Institutes for In-kind Contributions	• Science Cases	• Currently preparing science case study report.	

• Need support from wide-range research fields.