miniTAO/MAX38 Summary Report

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Presentation transcript:

miniTAO/MAX38 Summary Report T. Kamizuka (IoA/UT) miniTAO/MAX38 team miniTAO team 2013/03/14-15 miniTAO 1m 望遠鏡サイエンスワークショップ @ 東大天文センター

miniTAO/MAX38 MAX38 = Mid-infrared Astronomical eXplorer Mid-infrared instrument on miniTAO Imaging and Spectroscopy 30-micron band imaging 30-μm band open! Explore it ! Atmospheric Transmittance at 4200/5600m altitude miniTAO/MAX38

miniTAO/MAX38 Specifications Imaging N-band Spectroscopy Detector Si:Sb BIB MF-128 (DRS) Format 128 x 128 (Img: 64x128) FoV 1.3 arcmin x 2.5 arcmin Pixel Scale 1.26 arcsec/pix Specifications Imaging (L’, ) N, Q, 30μm-bands Diffraction limited imaging (λ>8.9 μm) N-band Spectroscopy λ= 7.2-12.7 μm Low-res. grism spc. (R~50) ※Details available in Asano + 2012 and MAX38 HP Detector Specifications Filter name Wave-length (μm) Band-width 1σ1s Sensitivity (Jy) Spatial Resol. (asec) 8.9μm 8.9 0.77 1.7 2.4 9.8μm 9.8 0.91 2.8 2.7 12.2μm 12.2 0.75 3.1 3.2 18.7μm 18.7 0.9 2.2 4.9 24.7μm 24.7 2.0 ? MMF-31 31.7 28 7.6 MMF-37 37.3 70 8.5 MIR-band imaging properties

Operation History Operation team First Light: 2009/11 Miyata-Lab. member & TAO member First Light: 2009/11 Science Observations 2009/11, 2010/9-10, 2011/5, 2011/10-11, 2012/10 ~280h observations Struggling against machine troubles and bad weather… Miyata-san and Asano-san installing MAX38 Galactic center 31μm-image Snow storm at Chajnantor

Observation Programs 30-micron Imaging Luminous blue variables (Nakamura-san) Planetary nebulae (Asano-san) Massive star forming regions (Uchiyama-san) N-band Imaging Volcano on Io (Yoneda-san) Asymptotic Giant Stars (Kamizuka) Asteroid (Miyata-san) N-band Spectroscopy Earth atmosphere (Hayashi-san) LBV η Car Io PN Mz3

Asteroid Asteroid 2005 YU55 Near earth asteroid Close Earth-approach on 2011/11/08 ～0.85 lunar distance Detailed observations in many wavelengths MAX38 got thermal infrared data temperature variation thermal inertia Observations + Thermo-Physical-Model High thermal inertia = Rubble-pile asteroid like Itokawa ? Paper is coming soon 5sec 7sec Moving asteroid on MAX38 image MIR Light Curve obtained by MAX38 Itokawa taken by Hayabusa

Asymptotic Giant Branch Stars AGB Stars Dying low/intermediate-mass stars Dust forming from ejected materials Good targets to probe dust formation Objects restarted dust formation Dust forming region observable directly Dust formation can be detected easily Search with MAX38 One object, T Col, shows clear spectral change (10 targets observed) T Col possibly restarted dust formation in last 20-30 years Mass-loss and dust formation around AGB star MIR spectrum of T Col

Future Plan Completion of MIMIZUKU required Operation of MIMIZUKU@Subaru needed MIMIZUKU = MIR instrument for TAO Parallel operation is difficult MAX38 will/may be closed in late 2013 Your strong request or help may extend the MAX38 life. Please give your opinion at the night session etc. MIMIZUKU Current schedule plan

Summary MAX38 has been conducted about 280h observations since 2009/11. Many kind of objects are observed. Dust formation around dying stars Star forming regions Solar system objects Earth atmosphere Many presentations in this workshop MAX38 will be closed in late 2013. Please give your comments on this.