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MOA-II 1.8m 望遠鏡の現状と将来

MOA-II 1.8m 望遠鏡の現状と将来. 1,Galactic Dark Matter (LMC & SMC) 2,Galactic structure (the Bulge) 3,Exoplanets (the Bulge) 4, GRB 5, Guest Obervation. 住 貴宏　（大阪大学） MOA collaboration. 100 arcsec. Gravitational Microlensing. star. If a lens is a star, elongation of images is an

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MOA-II 1.8m 望遠鏡の現状と将来

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  1. MOA-II 1.8m望遠鏡の現状と将来 1,Galactic Dark Matter (LMC & SMC) 2,Galactic structure (the Bulge) 3,Exoplanets (the Bulge) 4, GRB 5, Guest Obervation 住貴宏　（大阪大学） MOA collaboration

  2. 100arcsec. Gravitational Microlensing star • If a lens is a star, • elongation of images is an • order of 100arcsec. • Just see a star magnified lens observer distortion of space due to gravity

  3. MOA (since 1995)（Microlensing Observation in Astrophysics）（ New Zealand/Mt. John Observatory, Latitude：44S, Alt: 1029m） 1995~1998:MOA-0:0.6m,MOA-cam1(9Mpix) 1999~2005:MOA-I:0.6m,MOA-cam2(24Mpix) 2005~ :MOA-II:1.8m,MOA-cam3(80Mpix)

  4. MOA-II1.8m telescope（New Zealand/Mt. John Observatory at NZ, 44S） Mirror : 1.8m (F=2.91) CCD : 8kx10k pix. (MOA-cam3) FOV : 2.2 deg.2 First light： 3/2005 Survey start：　4/2006

  5. MOA-cam3 CCD 　: 8kx10k pix. (10 E2V CCD4482) Pixel size: 0.58 arcsec/pix (15μm) FOV 　: 2.2 deg.2 Read out　: 32 sec

  6. MOA-II filter

  7. Observation by MOA • 50 deg.2(50Mstars) • 1obs./night.(>MJup) • 1obs./95min.(Mjup) • 1obs./47min. (Mnep) • 1obs./15min. (M) G.C. 600events (2010) http://www.massey.ac.nz/~iabond/alert/alert.html

  8. Real-time Anomaly check at Mt.John The planet found on 11/9/2009 anomaly

  9. 10 events with timescale tE<２days ４７４events in 2 years M：lens mass MJ: Jupiter mass D：distance vt: velocity timescale： ~２０days for stars tE=1.2days ~Jupiter mass 1day

  10. Timescale tE distribution abundance:~1.8 as common as stars Mass ： 〜Jupiter mass Known objects 474events Main sequence White dwarf Brown dwarf Neutron star Planetary-mass objects Black hole Sumi et al. 2011, Nature, 473, 7347, 349-352

  11. Observational time&Operation rate ゲスト観測３２時間（２０１０−２０１１） Bulge Operation rate = observation time / night time≒ clear time

  12. ゲスト観測（松岡氏、名大） UKIDSS 赤外カタログフィールドをMOA-wideRed で観測 5分 x 347 = 32時間　（２０１０−２０１１夏） • High z QSO 探査ー＞宇宙再電離 • L, T型褐色矮星探査 様々な天体の二色図 (Y-J vs. I-Y)。 各赤方偏移にあるクエーサーの放射に対する銀河間空間透過率

  13. 将来計画 • Option A: カメラアップグレード • Option B: アフリカ、南米に新望遠鏡 • WFIRST衛星(2020~)

  14. MOA-cam4 plan 2011 • FOV 7~10 deg.2 • Pixel size ~0.5 arcsec/pix • Fully depleted CCD • ~256M pixels (32x2kx4kCCD)= 7.04deg2 • ~320M pixels (40x2kx4kCCD)= 8.8deg2 • ~384M pixels (48x2kx4kCCD)=10.56deg2 現在 240mm 343mm

  15. Cherenkov Telescope Array　(CTA) • GRB追観測用光学望遠鏡と連携　 　（ナミビアor アルゼンチン）

  16. The WFIRST Microlensing Exoplanet Survey: Recommended by ASTRO 2010 Decadal report WFIRST

  17. Kepler vs. WFIRST WFIRST – w/ extended mission Figures from B. MacIntosh of the ExoPlanet Task Force Complete the census of planetary systems in the Galaxy

  18. WFIRST’s Predicted Discoveries ~2000 FFP！ ~190 sub Eath-mass FFP! (>30 Earth-mass FFP！) Free-floating rocky planets may have liquid water, Stevenson (1999) ~3000 exoplanets ~300 sub Earth-mass Planets, >25 habitable planets （0.5-10 MEarh、0.72-2.0 AU） around FGK stars

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