subaru telescope

“Subaru instruments, science, & future”, M. Iye (NAOJ), 25.07.2009 @ La Palma

Subaru Instruments, Science, & Future Masanori Iye (National Astron. Obs.) 1990(Site for Subaru),1995(GTC review),1997(Obs WHT), 2009

1 ） Subaru Intrument Suite - Parameter space coverage, - Operational Aids　 2 ） Science Achievements - Probing the cosmic dawn – - Study on GRB – Hypernovae connection　 3 ） LGSAO and Wide field instruments - Subaru’s future in the ELT era


Subaru Telescope History ・ Design Study : 1984-1990 ・ Construction : 1991-1999 ・ Engineering FL : Jan.1999 ・ Open operation : Dec.2000-Cost ･ ~300MEuro for construction,

~20MEuro/yrScience (last five years) ・ proposal award rate 1/3 => 80

refereed papers/yr


Subaru Telescope image size statistics 　　　　　　　　　

FWHM size distribution

すばる　　　　　　　　　岡山

Best image w/o AO

▼

　 0.“65 Median

Okayama 2.“2

Kiso 2.”7

1 arcsec = 5 μradλ ／ D=0.06 arcsec (@λ=2μ) =0.015arcsec(@λ=0.5μ)

Miyashita et al.

Best image ～ 0”2 （ K 、R ） Median seeing ～ 0”6 (R) 　


Instrument Phase Space (2009)

Wavelength

Wav

elen

gth

res

olu

tio

n


Operational Aids8 instruments at 4 foci, 5(7) top units : 4 M2s, Suprime-Cam, (LGSLT, FMOS)

Semi-robotic Exchangers

Suprime-Cam, (FMOS)

AO188, IRCS, (HiCIAO)

FOCAS, MIRCS, CIAO, COMICS

HDS

M2 (Opt-Cs, Opt-Ns, IR-Ns, IR tip-tilt)

Many massive components

to exchange!


Cassegrain Instrment Exchanger


Top Unit Exchanger System

show Exchange_topunit_256.wmv


2. Science Achievements

1) High redshift galaxies Narrow-band imaging to survey for Lyman Alpha Emitters

2) Hypernova – GRB connection Spectrophotometry of core-collapse SNe


４ m telescopes

redshift８ m telescope

CCD

World record of the most distant galaxies

IOK-1 （ Iye et al. Nature 2006)

R

edsh

ift


The most distant galaxy 12.8 Gyr ago (z=6.964).Iye et al. 2006, Nature, 443, 186

1 / 41,533


　　　　 Guinness record (for 1052 days ）＊ New record will arrive at 95% confidence level at earliest in 27 days and at latest in 112 years.

@July 25, 2009


Cosmic Dawn

LAEs are decreasing in number from z=5.7, z=6.6, to z=7.0 　＝＞　 Due to intergalactic absorption fo Lyman α photons by neutral hydrogen.

End of re-inoization

Beginning of reionization


Connection of GRB and Hypernovae

SN 2002apNo GRBHypernovaPolarized SED

shows high velocity

Asymmetric Explosion

jet

GRB

Jet

SN 2003dh/GRB 030329

SN 2002ap

Polarized Scattered Light

SN 2003dh/GRB 030329 Jet along the l-o-s.Hypernova epoch

back-dating coincided with GRB event

No polarization

Jet visible only from its direction

Kawabata, Mazzali,….

Polarimetric Spectroscopy


Adaptive Optics and Subaru’s

future


188 element AO: first NGSAO image

θ1 Ori C

With 188 NGSAO (2006)

Orion Trapezium IR image

Without AO (1999)

6M$ LGSAO improved the image quality of 400M$ telescope by 10 times.


Subaru LGSAO system


Sum-frequency laser

13.5W(1064)+5.0W(1319)=>PPMgO:SLT=> 6.4W(NaD2)


LGSAO 2nd light movie

LGSAO-video : replay from 08:20


Wide Field Instruments


Hyper Suprime Cam (HSC) : 1.5d FOV


FMOS : 400 fibers in NIR


WFMOS: 4000 fibers, optical

ASPEN intiativeWide field multi 103.5 fiber spectrograph for cosmology and Galactic archeology. (BAO, Dark energy,..)

Gemini borad cancellation of WFMOS funding

NAOJ fund raising effort for HFMOS …


Subaru Synergy with TMT・ TMT chose MK.・ Subaru is

prepared to strengthen its wide field survey capability with HSC (+HFMOS?) for the ELT era.・ Time sharing

among 8m class telescopes to be arranged.

subaru telescope

Documents

subaru instruments

hfmos subaru synergy

wide field survey capability

image quality

hsc hfmos

guinness record

daysnew record

future masanori iye