JTPF

1
JTPF Japanese Terrestrial Planet Finder
M. Tamura (NAOJ) JTPF Working Group
TPF-C coronagraph WS 2006.9.28 1515-1530 (15
min)
2
Exoplanet/Disk Exploration Approaches in Japan
2006
2014
2018
1. Indirect detection of exoplanets Doppler (N2K
survey) Transit ongoing
Ground
ELT/ instrument? 2016?
Subaru/ HiCIAO/ AO188 ExAO 2007-
4. Direct observations of Earth-like planets
2A. Direct imaging of protoplanetary/ debris
disks young massive planets ongoing and
near-future
2B. Disk evolution Exo-zodi - disk late stage -
spectroscopy
SPICA 3.5m 2015?
JTPF 3.5m 2018?
3. Spectroscopy of disks outer planets
Space
AKARI 0.7m 2006
3
JTPF/High Contrast Space Telescope
At present, an optical high contrast space
telescope which realizes clean and stable images
is under main discussions for the JTPF
architecture.

Tele-scope 3.5m off-axis single aperture
Wave-length optical and near-IR (?0.5micron???0.2-5micron) w/ limited UV capability
Launch 2018
Lifetime 5-10 yr
Orbit Sun-Earth L2
Instru-ments Opt-NIR coronagraph
Instru-ments Wide-field NIR/Opt instruments
Instru-ments TBD UV spectrometer
Subaru
ETL
HCST
JWST
JTPF/HCST makes full use of SPICA bus system with
an optimization to shorter wavelengths.
Total FOV15
?Earth at 8pc
4
JTPF formality and collaboration basis

• Project officially approved both by NAOJ and ISAS
• NAOJ/NINS from April 2005, Phase A project
  approved, starting budget from MEXT
  Grant-in-Aids, 9 staff (PI Tamura)
• ISAS/JAXA from 2002, Working Group approved by
  the ISAS Science Steering Committee, 40 members
  (PI Shibai)
• Discussions have been made among both astronomy
  and planetary communities in Japan, and regarded
  one of the next possible programs at OPTICAL-IR
  (others are SPICA, ELT, JASMINE)

5
JTPF formality and collaboration basis

• Pre-Proposal (in Japanese) published in 2005.3

6
JTPF formality and collaboration basis

• Original mission? Collaborations? Which areas?
• Japanese-lead JTPF is probably after SPICA (3.5m,
  MIR-FIR, 2015) mission
• Coronagraph experience
• Subaru telescope NIR coronagraph (CIAO, HiCIAO)
• SPICA MIR coronagraph (Enya, Abe, Tanaka)
• Abe's talk
• Various coronagraph RD (Nishikawa, Baba, Abe,
  Tavrov)
• Nishikawa's talk
• A wide-field option (Subaru prime-focus camera
  team, CCD)
• Interferometer experience
• SPICA cooler (12mW_at_1.7K)
• SPICA mirrors (C/SiC)
• Optical interferometer (MIRA at NAOJ, Nishikawa)
• Balloon FIR interferometer experiments (FITE by
  Shibai team)

7
JTPF formality and collaboration basis

• Original mission? Collaborations? Which areas?
• Science with Subaru (NIR), ASTRO-F (MFIR),
  theories (simulations)
• NIR pre-survey of TPF/Darwin targets with the new
  AO coronagraph (Subaru/HiCIAO)
• see evening session (Tamura, Guyon)
• AKARI's MIR FIR unbiased census of TPF/Darwin
  targets
• Active theoretical groups (Ida, Kokubo,
  Tanaka,,,)
• Good collaborations among observers,
  theoreticians, and dust team are on-going.

8
ESP studies based on an MEXT fund
Grant-in-Aid for Scientific Research on
Priority Areas have started (2004-2008).
Observations
NAOJ
U Tokyo/ISAS
space-based (ASTRO-F)
ground-based (SUBARU)
Composition
Morphology
Theory and Experiments
Tokyo I Tech./NAOJ
Hokkaido U/Nagoya U
Large-scale numerical simulations
Laboratory experiments simulations
Technical developments
ISAS
Detector development exozodi
2006 Dec 11-13 - Intermediate WS 2008 TBD
International WS
Organizing exo-solar planet sciences in Japan