新生SPICAの体制・観測系検討の現状

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1 光赤天連スペース将来計画シンポジウム SPICA 現状報告 1. ESA-JAXA 共同技術検討 (CDF Study) とその後の技術検討 検討結果が確定し公開された その後 サイエンス検討を重ねた結果 検討のベースラインを望遠鏡口径 2.5m 温度 8K 以下に冷却する 横置き (Planck 型 ) 構造をベースラインとすることとした (8-11 ページ参照 ) 以下のチームが核となり ESA の技術検討結果および従来の SPICA の成果などを用いて 衛星全体の設計 冷却系 望遠鏡設計を進めている 来月には一次的な検討結果が得られる予定 2.SPICA CV M5 対応チーム設置 (6/4 所長決定 ) 宇宙研 (JAXA) の ΔMDR SRR のための作業 および ESA の Cosmic Vision 次回 M クラス公募への提案の作業を行うチームを組織し 設置した 宇宙研赤外 国内赤外線天文学研究者 宇宙研宇宙物理学研究系 宇宙研工学 研究開発本部 SE/PO 室 国際調整担当の合同チームチーム長 : 芝井 チーム長代理 : 小川博之 中川貴雄 プリプロジェクト再設置時までのチーム SPICA ステアリンググループ ( 所内外 ) と SPICA タスクフォース ( 所内 ) がチームの活動をウォッチ 1

2 3. SPICA チームの活動 3/25-27 SPICA(SAFARI?) コンソーシアム会議 (Utrecht) M5 提案に向けて最終決断 SAFARI チームが欧州 + カナダ + 米国 ( 一部研究者 ) に拡大 高分散中間赤外線分光機能 および系外惑星大気分光機能を搭載する方向で検討を進める (3 4 ページ参照 ) 3/31 SPICA 全体会 5/18 学術会議天文宇宙分科会にて状況報告 この間 サイエンス検討 深化を進めた (5-7 ページ参照 ) 6/3-5 米国遠赤外コミュニティーワークショップにて講演 6/19 SPICA 科学レビュー ( 宇宙研 ) 7/15 SPICA Science Case International Preview (Paris 宇宙研主催) (13ぺージ参照) 7/31 SPICA 全体会 9 月 SPICAコンソーシアム会議 (Bordeaux SAFARI 主催 ) (12ぺージ参照) 2

3 1. SPICA mission overview SPICA Space Infrared Telescope for Cosmology and Astrophysics SPICA is a space mission optimized for mid- and far-ir astronomy. SPICA unveils the dusty era in the Universe (evolution of galaxies), and finds a route to habitable planets (formation of planetary systems). SPICA is launched at ambient temperature, and cooled down in space. (The cryo-cooler system is a key heritage of JAXA from IRTS and AKARI.) Japanese SMI is a mid-ir spectrometer covering mm. European SAFARI is a far-ir spectrometer covering mm. SPICA is a joint mission of JAXA and ESA with other international partners. SPICA is now in its re-definition phase in JAXA, and will go to the open competition as an M-class mission of the ESA Cosmic Vision program. Baseline specifications Telescope : 2.5 m aperture, cooled below 8 K Core wavelength : mm (+ High-resolution spectrometer at mm, Exoplanet instrument at 5 20 mm) Orbit : S-E L2 Halo Orbit Launcher : JAXA H-3 Vehicle Launch Year :

4 Enrichment of the Universe with metal and dust leading to the formation of habitable worlds O H Mg Si O OO O H D HH H SPICA studies how stars have been formed in galaxies along the history of the Universe (Goal1: evolution of galaxies), and how planets have been formed in a disk around a forming star and evolved to be habitable (Goal2: formation of planetary systems). IR spectroscopy SPICA s unique probes λ (μm) Dust bands HRS (organic matter, mineral, ice) Extinction-free metal lines 3. Molecular hydrogen lines λ (μm) AKARI Mid-IR all-sky map 4

5 大目標 銀河成長と惑星系形成 : 多様で豊かな宇宙を生んだ二大過程の解明 目的 1. 銀河成長 物質進化過程の解明 - ダストに隠された銀河成長最盛期 ( 宇宙論的分光サーベイ 10 平方度 ) - 星生成と物質進化の相互作用 ( 近傍銀河 4000 個 ) 目的 2. 惑星系形成過程の解明 - ガスの精密定量による惑星形成シナリオの検証 - 惑星形成における水と氷の役割 - 惑星系外縁天体の起源

6 IR luminosity density (L / Mpc 3 ) 1. SPICA mission overview Space infrared astronomy: from IRTS, AKARI to SPICA IRTS (Japan) 1995 IRTS Goto+ 2010, A&A 514, 6 AKARI (Japan, Korea, Europe) 2006 ~2011 Spitzer (US) 2003 ~ AKARI survey mid-ir spectroscopy Herschel (Europe, US) far-ir spectroscopy Evolution of galaxies Photometry SPICA Exploration IR galaxy Luminous IR Ultra-luminous IR redshift z=3 Spectroscopy Physics 6

7 1. SPICA mission overview Work-sharing plan Telescope Payload Module Cryocooler Focal Plane Instrument Assembly FIR Spectrometer (SAFARI) NL + European countries + Canada & US MIR Instrument (SMI) SPICA Data Center (NAOJ) Bus Module Launcher Focal Plane Attitude Sensor Science Community JP, Europe, US, KR, TW,,, Exoplanet Spectroscopy (SPEChO) European countries 7

8 Current baseline configuration Planck-type PLM with a 2.5-m, <8K telescope Mirror M1 2.5 mf M2 Support Structure Telescope Baffle Mirror M2 PLM Metering Structure Cryo Warm Electronics SVM Top Panel Telescope Optical Bench Telescope Shield (20 K) Supporting Bipod V-Groove thermal shields AOC StarTracker 1K-JT Compressors 2ST Compressors 1K-JT Compressors 8

9 運用体制 ( 案 ) JAXA 宇宙科学研究所 Operational Ground Segment Science Ground Segment 国立天文台 JAXA JAXA Stations Mission Operation Center (MOC) Science Operation Center (SOC) Science Data Center (SDC) Non- European User Community (Japan) (East Asia) Instrument Control Centers (ICCs) ESA ESA Stations ESA ESA Science Center (ESC) European Data Archive Center (ESDC) TBD European User Community 研究は基本的に共同利用であり データが広い範囲の研究者に公開される 9

10 プロジェクト推進体制 - SPICA コンソーシアム 日本 欧州 M5 Proposal ESA NAOJ JAXA SRON SPICA-J Project SPICA Consortium SAFARI Consortium 遠赤外線観測装置 ( 欧州 +) SMI Consortium 中間赤外観測装置 ( 日本 ) 名大 東大他 Scientists (outside the instrument teams) 装置チーム外研究者 SPEChO Consortium 系外惑星大気分光装置 ( 検討中 ) 10

11 ( 参考 ) 国際評価委員会 目的 SPICA 計画について 科学的観点からの評価を得る 日時 場所 2015 年 7 月 15 日 Paris 評価委員 Michael Rowan-Robinson (UK), Martin Bureau (UK), Anthony Jones (FR) Peter Barthel (NL) Anthony Peter Jones (FR) Martin Harwit (US), George Helou (US) Kazuhisa Mitsuda (JP), ISAS Saku Tsuneta, Masaki Fujimoto, Munetaka Ueno, Ikko Funaki SPICA Hiroshi Shibai (PI), Takashi Onaka (PS), Hidehiro Kaneda (PI 補佐 ), Kotaro Kohno (PS 補佐 ) Daisuke Ishihara, Takehiko Wada, Naoki Isobe, Peter Roelfsema (NL), Bruce Sibthorpe (NL) 11

12 1. SPICA mission overview Space infrared astronomy: from IRTS, AKARI to SPICA IRTS (Japan) 1995 IRTS AKARI (Japan, Korea, Europe) 2006 AKARI survey ~2011 Spitzer (US) 2003 ~ mid-ir spectroscopy SPICA SPICA Formation of planetary systems Herschel (Europe, US) far-ir spectroscopy AU Case study ~1 AU Planet-forming disk Universality 12

13 1. SPICA mission overview Project schedule Reviews & Phases Model & Tests CY JAXA ESA JAXA Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Phase-A Phase-B Phase-C MDR SRR SDR Project Appr. Rev. pre-pdr Sys-PDR pre-cdr Sys-CDR PSR Launch Phase-A PRR Phase-B1 SRR Phase-B2 PDR Phase-C CDR Phase-D QR? AR margin Phase-E1 Phase-D Phase-E 2028 PLM Comp Dev. MCS Comp. Dev. PLM/CRYO Design manufacture MCS Design / Manufacture Manufacture PLM/CRYO-STM MCS FAS PLM/CRYO AI L Launch Operation FAS Design manufacture PLM PLM IVT ESA System IVT System IVT Caption SVM Design manufacture SVM FM SIA IV SIA IVT FPI Warm Elechtronics CQM (FPI) Design STA Manufacture AIV EM/STM STA Design / Manufacture Front Loading FPIA Design IOB-STM MCS-EM FPIA FPIA IVT SMI Consortium SMI Components Developmen SMI Design Manufacture manufacture Detector Modules SMI SMI-CQM SAFARI Consortium + SAFARI Components Devekopment SAFARI Design Manufacture Manufacture SAFARI SAFARI-CQM Operation: 3 Years (Nominal), 5 Years (Goal) 13

14 1. SPICA mission overview Importance of a cryogenically-cooled IR telescope K 10 5 reduction! SPICA (8K) SPICA 14

15 1. SPICA mission overview Dramatic improvement in the sensitivity SOFIA AKARI FIS-FTS Limiting Line Flux (5-1hr) / Wm AKARI IRC R=25000 JWST/MIRI R=3000 Spitzer SPICA 100 Improvement R=300 HERSCHEL SPICA/SAFARI 2010's 2020's ALMA Wavelength / mm 15

16 1. SPICA mission overview SPICA s uniqueness in extra-galactic astronomy Sensitivity (5, 1 hour) of ALMA, SPICA, JWST and TMT, plotted on spectra of typical star-forming galaxies at z = 3 with different dust extinction values (A V = 0.3, 3, 30 mag). SPICA provides unique spectral tools to study physics in dust-obscured galaxies. SPICA A V = 0.3 mag ALMA II Zw 96 TMT JWST SPICA fills the spectral gap between ALMA and JWST. 16

17 2.1. Overview Science goals and objectives Top-level goal Enrichment of the Universe with metal and dust, leading to the formation of habitable worlds [SG1] Evolution of galaxies Science objectives SCIENCE GOALS [SG2] Formation of planetary systems Science objectives [SO1] Star formation of distant galaxies [SO4] Gas dissipation in PPDs [SO2] AGN outflow [SO5] Debris disks to solar system [SO3] Star formation in nearby galaxies [SO6] Exoplanet atmosphere 17

18 3.3. SPICA mission overview Baseline design payload module Planck-type PLM with a 2.5 m, 8 K telescope secondary mirror cryocooler system primary mirror telescope thermal shield V-groove thermal shields telescope baffle instrument optical bench service module Front view Side view 18

19 3.3. SPICA mission overview Telescope Optical design The 2.5 mφ optical design is scaled from the 2.0 mφ CDF study. Optical specifications Telescope type : Ritchey Chrétien Entrance Pupil Diameter : 2.5 m Field of View : 30 arcmin Wave Front Error : <1.4 mm rms Diffraction limited at 20 mm Temperature Launch: Room temperature Operation: < 8 K Fabrication ESA is in charge of the procurement of the telescope. Technical Heritage The mirrors are based on the AKARI and Herschel heritage (SiC mirrors). 19

20 3.3. Configuration and specifications Mechanical cryo-coolers Mechanical cryo-coolers in the baseline design have been developed in Japan. 20K-class two-stage Stirling cooler (2ST) 4K-class J-T cooler (4K-JT) 1K-class J-T cooler (1K-JT) Cooling objectives JT precooling STA + FPIA FPIA (SAFARI+SMI) Cooling power (EOL) 200 mw@20 K, 1000 mw@100 K 40 mw@4.5 K 10 mw@1.7 K Input power < 90 W < 90 W < 75 W Lifetime > 3 years (goal: 5 years) >3 years (goal: 5 years) >3 years (goal: 5 years) Heritage AKARI (2006), JEM/SMILES (2009) ASTRO-H (2015) JEM/SMILES (2009) ASTRO-H (2015) Based on 4 K-JT R&D status TRL6 (ASTRO-H) TRL6 (ASTRO-H) TRL5 Cooling performance & reliability have improved based on AKARI & SMILES (e.g., flexure bearings to support the piston and displacer, inner outgas control, microphonics control). Design lifetime of 1K-JT has improved based on ASTRO-H 4K-JT with enhanced contamination control. These technologies are reflected in the 2ST and 4K-JT coolers. 20

21 3.3. Configuration and specifications Focal-plane instruments SPICA Mid-IR Instrument: SMI (LRS) mm, Si:Sb, prism:10 slit x x10 slit viewer, high mapping speed (MRS) mm, Si:Sb, grating:1 slit + beam-steering mirror, high sensitivity (HRS) mm, Si:As, grating: 6 slit + beam-steering mirror, high resolution SPICA Far-IR Instrument: SAFARI mm, TES, grating: 4 beams + beam-steering mirror, high sensitivity EChO instrument on SPICA: SPEChO 5-20 mm, Si:As, grating, high-stability ( in one eclipse) monitoring Spectral Resolution Line Sensitivity JWST/MIRI-MRS JWST/MIRI-LRS Spitzer/IRS Spitzer/IRS R = R = 1000 SPICA/SMI SPICA/SAFARI R = 3000 R = 300 Wavelength (mm) Wavelength (mm) 21

22 3.3. Configuration and specifications Instrument configuration on the telescope optical bench SPEChO FAS (Focal attitude sensor) SMI SAFARI SMI 22

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