moa-ii 1.8m 望遠鏡の現状と将来
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
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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
住 貴宏 (大阪大学)
MOA collaboration
住 貴宏 (大阪大学)
MOA collaboration
1,Galactic Dark Matter (LMC & SMC)
2,Galactic structure (the Bulge)
3,Exoplanets (the Bulge)
4, GRB
5, Guest Obervation
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Gravitational MicrolensingGravitational MicrolensingGravitational MicrolensingGravitational Microlensing starstar
observerobserver lenslens
distortion of space due to gravity distortion of space due to gravity
100100arcsec.arcsec. If a lens is a star, elongation of images is an order of 100arcsecarcsec.
Just see a star magnified
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MOA (since 1995)
( Microlensing Observation in Astrophysics )( New Zealand/Mt. John Observatory, Latitude : 44S, Alt: 1029m )
MOA (since 1995)
( Microlensing Observation in Astrophysics )( New Zealand/Mt. John Observatory, Latitude : 44S, 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)
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)
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MOA-II1.8m telescope( New Zealand/Mt. John Observatory at NZ, 44S )
Mirror : 1.8m (F=2.91)CCD : 8k x 10k pix. (MOA-cam3) FOV : 2.2 deg.2
Mirror : 1.8m (F=2.91)CCD : 8k x 10k pix. (MOA-cam3) FOV : 2.2 deg.2
First lightFirst light :: 3/20053/2005Survey startSurvey start : : 4/20064/2006
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MOA-cam3CCD : 8k x 10k pix. (10 E2V CCD4482)
Pixel size: 0.58 arcsec/pix (15μm) FOV : 2.2 deg.2
Read out : 32 sec
CCD : 8k x 10k pix. (10 E2V CCD4482)
Pixel size: 0.58 arcsec/pix (15μm) FOV : 2.2 deg.2
Read out : 32 sec
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MOA-II filterMOA-II filter
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Observation by MOAObservation by MOA
•50 deg.2(50Mstars)
1obs./night.(>M1obs./night.(>MJupJup))
•1obs./95min.(Mjup)
1obs./47min. (Mnep)
1obs./15min. (M)
•50 deg.2(50Mstars)
1obs./night.(>M1obs./night.(>MJupJup))
•1obs./95min.(Mjup)
1obs./47min. (Mnep)
1obs./15min. (M)600600events (2010)events (2010)
http://www.massey.ac.nz/~iabond/alert/alert.html
G.C.
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Real-time Anomaly check at Mt.JohnReal-time Anomaly check at Mt.JohnThe planet found
on 11/9/2009
anomalyanomaly
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10 events with timescale tE< 2 days10 events with timescale tE< 2 days
tE=1.2days ~Jupiter mass
1day
€
tE =RE (M,D)
v t~ M /MJ day
M : lens massMJ: Jupiter massD : distancevt: velocity
timescaletimescale ::
474 events in 2 years
~ 20 days for stars
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Timescale tE distributionTimescale tE distribution
Sumi et al. 2011, Nature, 473, 7347, 349-352
474events
Planetary-massobjects
Known objects
Black hole
Neutron star
White dwarf
Main sequence
Brown dwarf
€
N planet =1.8−0.8+1.7Nstar
M planet =1.1−0.6+1.2MJ
abundance :~1.8 as common as starsMass : 〜 Jupiter mass
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Observational time&Operation rateObservational time&Operation rate
Operation rate = observation time / night time ≒ clear time
BulgeBulge
ゲスト観測32時間(2010−2011)
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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
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
様々な天体の二色図 (Y-J vs. I-Y) 。
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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~)
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MOA-cam4 planMOA-cam4 plan• 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
• 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
2011
240mm
343mm
現在
現在 計画 観測効率
CCD 読み出し時間
32sec 16sec 1.14 倍 (60 秒露出時 )
量子効率( fully depleted CCD )
長波長感度高い
1.40 倍 (Red-band)
CCD( 視野 )
10 枚(2.2 平方度 )
32 枚(7.0 平方度 )
3.20 倍
合計 5.10 倍
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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)
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The WFIRST Microlensing The WFIRST Microlensing Exoplanet Survey: Exoplanet Survey:
Recommended by ASTRO 2010 Recommended by ASTRO 2010 Decadal reportDecadal report
WFIRST
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Kepler Kepler vs. WFIRSTWFIRST
Figures from B. MacIntosh of the ExoPlanet Task Force Figures from B. MacIntosh of the ExoPlanet Task Force
WFIRST – w/ extended mission
Complete the census of planetary systems in the Galaxy
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WFIRST’s Predicted Discoveries
~3000 exoplanets~300 sub Earth-mass Planets,>25 habitable planets( 0.5-10 MEarh 、 0.72-2.0 AU ) around FGK stars
~3000 exoplanets~300 sub Earth-mass Planets,>25 habitable planets( 0.5-10 MEarh 、 0.72-2.0 AU ) around FGK stars
~2000 FFP !~190 sub Eath-mass FFP!(>30 Earth-mass FFP ! )
Free-floating rocky planets may have liquid water, Stevenson (1999)