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ASTE 近傍銀河 成果報告

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ASTE 近傍銀河 成果報告. 村岡和幸 (大阪府立大学) & ASTE 近傍銀河 プロジェクトチーム. 近傍銀河観測の目的. ( ミリ波 ) サブミリ波帯の (multi-)line 観測から、 星間物質・分子雲のさまざまな性質や物理量 (質量・密度・温度・金属量・運動・進化段階 etc... )をパラメータとして、 銀河中の星形成則を(総合的に)理解する。 ASTE では、特に高励起の輝線 (J=3-2 以上 ) を使い、高温・高密度の分子ガスの分布や星形成との関係を調べている。  (ただし、 CI( 3 P 1 - 3 P 0 ) の観測も進めている). - PowerPoint PPT Presentation

Text of ASTE 近傍銀河 成果報告

  • ASTE&ASTE

  • ()(multi-)line etc...

    ASTE(J=3-2 )CI(3P1-3P0)

  • 2010 20112010 CATS345 & Band8 QMM 33Magellanic Clouds

    2011 CATS345M 83NGC 6822Magellanic Clouds

  • Magellanic Cloudsd = 50 60 kpcLow-metallicity environmentYoung and massive star forming clusters=> Relation between properties of ISM and star/cluster formationASTE observations:12CO(3-2) & 13CO(3-2)Determination of physical properties (temperature and density) of dense molecular clumpsCI(3P1-3P0)Evolution and/or photo-dissociation effects

  • (1) LMC: 12CO(3-2), 13CO(3-2), & 13CO(1-0) GMC150 pcType I(GMC225)Type II(N206D)Type III(30Dor, N159)HII

    HII

    HII(Fukui 2006, Kawamura et al. 2009)(Minamidani et al. 2008, Minamidani et al. 2011)Tkin (K)n(H2) (cm-3)10010103104

  • (2) SMC: 12CO(3-2), 13CO(3-2)Contour: NANTEN 12CO(1-0)(Mizuno+2001)N12A 12CO(3-2)N12A 13CO(3-2)13CO(1-0) obs.: on-going (with Mopra)Temperature, density
  • (3) Band8QM CI observation: LMCEvolution and/or photo-dissociation effects on dense molecular clumpsObserved four CO peaks (N159W, E, S, GMC225) : total 24hrs=> Detected from all observed peaksRelatively intense CI emission from GMC225 => young phase ?Comparison with models

  • M 33 (D = 840 kpc) OTF Observations

    Target objectM33 GMCHII NGC604Receiver CATS345BAND8 QMLine12CO(3-2)CI(3P1-3P0)Period201069145 (26 )20101112 (3)Velocity resolution2.5 km/s2.5 km/sTsys150 ~ 500 K1500 ~ 5000 KNoise level10 ~ 40 mK (Ta*)70 mK (Ta*)Not detected

  • CO (3-2) & CO(1-0) mapColor: CO(3-2)Grey: CO(1-0)

  • CO(1-0)CO(3-2)CO(3-2)/CO(1-0)GMCGrey: HRed: CO(1-0) contour(Onodera et al. in prep.)

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