Processing of ices based on AKARI near-infrared spectroscopy

• Project Area: Evolution of molecules in space: from interstellar clouds to proto-planetary nebulae
• Project/Area Number: 16H00934
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: The University of Tokyo
• Principal Investigator: 尾中 敬 東京大学, 大学院理学系研究科(理学部), 教授 (30143358)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 星間物理 / 星間塵 / 赤外線観測

Outline of Annual Research Achievements

新しい波長較正を適用して「あかり」IRCの銀河面星生成領域を中心とした近赤外線スペクトルの解析を行った。まずIRCのslit-less分光による銀河面サーベイにより発見された2つの若い天体候補の赤外線スペクトルを詳細に解析した。この結果、H2OおよびCO2氷の吸収線の他に、4.6ミクロン帯にみられる幅広い吸収は、150K程度の一酸化炭素のガスの吸収とXCNと同定される物質の吸収でよく説明されることがわかった。これらの特徴は若い天体に固有のものであるが、一方、Herschel衛星による観測では遠赤外線では放射が検出されておらず、近赤外線から遠赤外線にかけてのエネルギー分布は背景星である可能性を示唆する。この2つの天体が存在する領域には、特に星生成領域は検出されていない一方、深い吸収を示すような濃い星間雲も存在せず、若い星か背景星かを確定するには、さらに高い波長分解脳の観測が必要であるとの結論に達した。これらと並行して、新しい波長較正に基づくスペクトルを用い、銀河面内の複数の星生成領域の氷に吸収バンドの解析を行い、星生成過程の進行とともに、CO2氷がH2O氷と比較して減少していく傾向があることを示す結果を得た。さらに3.3, 3.4ミクロンにみられる、芳香族および脂肪族に起因する輝線バンドと進化の関係を調べ、脂肪族が進化とともに減少している傾向があることも得た。星生成の進行とともに、星間の氷および有機物が変成していくことを観測的に初めて示す結果を得た。

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] The Scaly Nuclear Research Center/Instite de Recherche en Astrophysique/Observatoire de Paris(フランス)
• [Int'l Joint Research] Tezpur University(インド)
• [Int'l Joint Research] NASA Ames Research Center(米国)
• [Int'l Joint Research] The Saclay Nuclear Research Center/Instite de Recherche en Astrophysique/Observatoire de Paris(フランス)
• [Int'l Joint Research] Leiden University(オランダ)
• [Int'l Joint Research] Tezpur University(インド)
• [Journal Article] Near-infrared to mid-infrared observations of galaxy mergers: NGC 2782 and NGC 7727 (2018)
  • Author(s): T. Onaka, T. Nakamura, I. Sakon, R. Wu, R. Ohsawa, H. Kaneda, V. Lebouteiller, and T. L. Roellig
  • Journal Title: The Astrophysical Journal Volume: 853 Issue: 1 Pages: 31-31
  • DOI: 10.3847/1538-4357/aaa004
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The State-of-Play of Anomalous Microwave Emission (AME) Research (2018)
  • Author(s): C. Dickinson, Y. Ali-Haimoud, A. Barr, E. S. Battistelli, A. Bell, L. Bernstein, S. Casassus, K. Cleary, B. T. Draine, R.Genova-Santos, S. E. Harper, B. Hensley, J. Hill-Valler, T. Hoang, F. P. Israel, L. Jew, A. Lazarian, J. P. Leahy, J. Leech, C. H. Lopez-Caraballo, I. McDonald, E. J. Murphy, T. Onaka, R. etc.
  • Journal Title: New Astronomy Review Volume: 80 Pages: 1-28
  • DOI: 10.1016/j.newar.2018.02.001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Constraining physical conditions for the PDR region of Trumpler 14 in the Carina Nebula (2018)
  • Author(s): R. Wu, E. Bron, T. Onaka, F. Le Petit, F. Galliano, D. Languignon, T. Nakamura, and Y. Okada
  • Journal Title: Astronomy and Astrophysics Volume: 印刷中
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Mid-infrared multi-wavelength imaging of Ophiuchus IRS 48 transitional disk (2018)
  • Author(s): M. Honda, K. Okada, T. Miyata, G. D. Mulders, J. R. Swearingen, T. Kamizuka, R. Ohsawa, T. Fujiyoshi, H. Fujiwara, M. Uchiyama, and T. Onaka
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 印刷中 Issue: 3 Pages: 44-44
  • DOI: 10.1093/pasj/psy033
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Enhanced dust emissivity power-law index along the western Hα filament of NGC 1569 (2018)
  • Author(s): Suzuki, T., Kaneda, H., Onaka, T., Yamagishi, M., Ishihara, D., Kokusho, T., & Tsuchikawa, T.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 477 Issue: 3 Pages: 2705-2715
  • DOI: 10.1093/mnras/sty800
  • Peer Reviewed / Open Access
• [Journal Article] Faint warm debris disks around nearby bright stars explored by AKARI and IRSF (2017)
  • Author(s): Ishihara, Daisuke; Takeuchi, Nami; Kobayashi, Hiroshi; Nagayama, Takahiro; Kaneda, Hidehiro; Inutsuka, Shu-ichiro; Fujiwara, Hideaki; Onaka, Takashi
  • Journal Title: Astronomy & Astrophysics Volume: 601 Pages: A72-A72
  • DOI: 10.1051/0004-6361/201526215
  • NAID: 120006380356
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] A likely detection of a local interplanetary dust cloud passing near the Earth in the AKARI mid-infrared all-sky map (2017)
  • Author(s): Ishihara D.、Kondo T.、Kaneda H.、Suzuki T.、Nakamichi K.、Takaba S.、Kobayashi H.、Masuda S.、Ootsubo T.、Pyo J.、Onaka T.
  • Journal Title: Astronomy & Astrophysics Volume: 603 Pages: A82-A82
  • DOI: 10.1051/0004-6361/201628954
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A circumstellar disk around HD 169142 in the mid-infrared (N-band) (2017)
  • Author(s): Y. K. Okamoto, H. Kataza, M. Honda, T. Yamashita, T. Fujiyoshi, T. Miyata, S. Sako, H. Fujiwara, I. Sakon, M. Fukagawa, M. Momose, and T. Onaka
  • Journal Title: The Astronomical Journal, Volume: 154 Issue: 1 Pages: 16-16
  • DOI: 10.3847/1538-3881/aa7578
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] VLT/ISAAC infrared spectroscopy of embedded high-mass YSOs in the Large Magellanic Cloud: Methanol and the 3.47 μm band (2016)
  • Author(s): Takashi Shimonishi, Emmanuel Dartois, Takashi Onaka, Francois Boulanger
  • Journal Title: Astronomy and Astrophysics Volume: 585 Pages: 1-20
  • DOI: 10.1051/0004-6361/201526559
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Deuterated Polycyclic Aromatic Hydrocarbons: Revisited (2016)
  • Author(s): Doney, K., D., Candian, A., Mori, T., Onaka, T., and Tielens, A. G. G. M.,
  • Journal Title: Astronomy and Astrophysics Volume: 586 Pages: A65-A65
  • DOI: 10.1051/0004-6361/201526809
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Concurrent Formation of Carbon and Silicate Dust in Nova V1280 Sco (2016)
  • Author(s): Sakon, I., Sako, S., Onaka, T., Nozawa, T., Kimura, Y., Fujiyoshi, T., Shimonishi, T., Usui, F., Takahashi, H., Ohsawa, R., Arai, A., Uemura, M., Nagayama, T., Koo, B-C., and Kozasa, T.
  • Journal Title: The Astrophysical Journal Volume: 817 Issue: 2 Pages: 145-167
  • DOI: 10.3847/0004-637x/817/2/145
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Revised calibration for near- and mid-infrared images from ~4000 pointed observations with AKARI/IRC (2016)
  • Author(s): Egusa, F., Usui, F., Murata, K., Yamashita, T., Yamamura, I., & Onaka, T.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Issue: 2
  • DOI: 10.1093/pasj/psv135
  • Peer Reviewed / Open Access
• [Journal Article] Modeling of the Zodiacal Emission for the AKARI/IRC Mid-infrared All-sky Diffuse Maps (2016)
  • Author(s): Toru Kondo, Daisuke Ishihara, Hidehiro Kaneda, Keichiro Nakamichi, Sachi Takaba, Hiroshi Kobayashi, Takafumi Ootsubo, Jeonghyun Pyo, Takashi Onaka
  • Journal Title: The Astronomical Journal Volume: 151 Issue: 3 Pages: 71-71
  • DOI: 10.3847/0004-6256/151/3/71
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Revised Wavelength and Spectral Response Calibrations for AKARI Near-Infrared Grism Spectroscopy: Cryogenic Phase (2016)
  • Author(s): S. Baba, T. Nakagawa, M. Shirahata, N. Isobe, F. Usui, Y. Ohyama, T. Onaka, K. Yano, C. Kochi
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68(2) Issue: 2
  • DOI: 10.1093/pasj/psw013
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] AKARI/IRC Near-infrared Spectral Atlas of Galactic Planetary Nebulae (2016)
  • Author(s): Ohsawa, R., Onaka, T., Sakon, I., Matsuura, M., & Kaneda, H.
  • Journal Title: The Astronomical Journal Volume: 141 Issue: 4 Pages: 93-93
  • DOI: 10.3847/0004-6256/151/4/93
  • Peer Reviewed / Open Access
• [Journal Article] The Detection of a Hot Molecular Core in the Large Magellanic Cloud with ALMA (2016)
  • Author(s): Shimonishi, T., Onaka, T., Kawamura, A., & Aikawa, Y.
  • Journal Title: The Astrophysical Journal Volume: 827 Issue: 1 Pages: 1-20
  • DOI: 10.3847/0004-637x/827/1/72
  • Peer Reviewed / Open Access
• [Journal Article] AKARI Near-infrared Spectroscopy of the Extended Green Object G318.05+0.09: Detection of CO Fundamental Ro-vibrational Emission (2016)
  • Author(s): Onaka, T., Mori, T., Sakon, I., & Ardaseva, A.
  • Journal Title: The Astrophysical Journal Volume: 829 Issue: 2 Pages: 106-106
  • DOI: 10.3847/0004-637x/829/2/106
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Spatial Variations of PAH Properties in M17SW Revealed by Spitzer/IRS Spectral Mapping (2016)
  • Author(s): Yamagishi, M.; Kaneda, H.; Ishihara, D.; Oyabu, S.; Suzuki, T.; Onaka, T.; Nagayama, T.; Umemoto, T.; Minamidani, T.; Nishimura, A.; Matsuo, M.; Fujita, S.; Tsuda, Y.; Kohno, M.; Ohashi, S.
  • Journal Title: The Astrophysical Journal Volume: 833 Issue: 2 Pages: 163-163
  • DOI: 10.3847/1538-4357/833/2/163
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Mid-infrared vibrational study of deuterium-containing PAH variants (2016)
  • Author(s): Buragohain, M., Pathak, A., Sarre, P., Onaka, T., & Sakon, I.
  • Journal Title: Planetary and Space Science Volume: 133 Pages: 97-106
  • DOI: 10.1016/j.pss.2016.05.001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] 窒素含有炭素質ダストの合成実験 (2018)
  • Author(s): 遠藤いずみ, 左近 樹, 尾中 敬, 木村誠二, 小川奈々子, 大河内直彦, 藪田ひかる, 癸生川陽子, 小林憲正, 和田節子
  • Organizer: 日本天文学会2018年春季年会
• [Presentation] The Stellar Spectroscopic Variabilities Investigated with the AKARI Near-infrared Catalogs of the Large Magellanic Cloud (2018)
  • Author(s): J. Zhang, T. Onaka, I.Sakon, F.Usui, T. Shimonishi, and Yoshifusa Ita
  • Organizer: 日本天文学会2018年春季年会
• [Presentation] Properties of infrared emission of novae detected in AKARI all-sky survey (2017)
  • Author(s): I. Sakon, S. Shimamoto, T. Onaka, R. Ohsawa, D. Ishihara, F. Usui, T. Ootsubo, and Y. Doi
  • Organizer: The Cosmic Wheel and the Legacy of the AKARI Archive: from galaxies and stars to planets and life
  • Int'l Joint Research
• [Presentation] A look at possible microwave dust emission via AKARI infrared all-sky surveys (2017)
  • Author(s): A. Bell, T. Onaka, F. Galliano, R. Wu, Y. Doi, D. Ishihara, H. Kaneda, M.Hammonds, and M. Giard
  • Organizer: The Cosmic Wheel and the Legacy of the AKARI Archive: from galaxies and stars to planets and life
  • Int'l Joint Research
• [Presentation] The AKARI phase 3 near-infrared spectroscopic catalog of the Large Magellanic Cloud and the stellar spectroscopic variability (2017)
  • Author(s): J. Zhang, T. Onaka, I.Sakon, F. Usui, T. Shimonishi, and Y. Ita
  • Organizer: The Cosmic Wheel and the Legacy of the AKARI Archive: from galaxies and stars to planets and life
  • Int'l Joint Research
• [Presentation] Infrared property of nitrogen-including carbonaceous dust produced via microwave discharge and its comparison with the observed unidentified infrared (UIR) bands (2017)
  • Author(s): I. Endo, I. Sakon, T. Onaka, S. Kimura, S. Wada, N. Ogawa, N. Ohkouchi, and H. Yabuta
  • Organizer: The Cosmic Wheel and the Legacy of the AKARI Archive: from galaxies and stars to planets and life
  • Int'l Joint Research
• [Presentation] Analysis of ice absorption features toward YSOs candidates using AKARI (2017)
  • Author(s): T. Kimura, T.Onaka, I. Sakon, and T. Shimonishi
  • Organizer: The Cosmic Wheel and the Legacy of the AKARI Archive: from galaxies and stars to planets and life
  • Int'l Joint Research
• [Presentation] AKARI near- and mid-infrared slitless spectroscopic catalogue (2017)
  • Author(s): M. Yamagishi, T. Mizuki, I. Yamamura, F. Usui, and T. Onaka
  • Organizer: The Cosmic Wheel and the Legacy of the AKARI Archive: from galaxies and stars to planets and life
  • Int'l Joint Research
• [Presentation] Debris Disks and the Zodiacal Light - from AKARI to SPICA (2017)
  • Author(s): D. Ishihara, H. Kaneda, M. Fukagawa, S. Takaba, H. Kobayashi, H. Fujiwara, T. Ootsubo, J. Pyo, A. Higuchi, and T. Onaka
  • Organizer: The Cosmic Wheel and the Legacy of the AKARI Archive: from galaxies and stars to planets and life
  • Int'l Joint Research
• [Presentation] Evolution of the Unidentified Infrared Bands in the Nucleus of the Starburst Galaxy NGC 1097 (2017)
  • Author(s): R. Wu, F. Galliano, and T. Onaka
  • Organizer: The Cosmic Wheel and the Legacy of the AKARI Archive: from galaxies and stars to planets and life
  • Int'l Joint Research
• [Presentation] AKARI/IRC Near-Infrared Point Source Spectral Catalogue (2017)
  • Author(s): F. Usui, T. Onaka, and The AKARI/IRC team
  • Organizer: The Cosmic Wheel and the Legacy of the AKARI Archive: from galaxies and stars to planets and life
  • Int'l Joint Research
• [Presentation] Revised calibration for near- and mid-infrared images from AKARI /IRC pointed observations in Phases 1 and 2 (2017)
  • Author(s): F. Egusa, F. Usui, K. Murata, T. Yamashita, I. Yamamura, and T. Onaka
  • Organizer: The Cosmic Wheel and the Legacy of the AKARI Archive: from galaxies and stars to planets and life
  • Int'l Joint Research
• [Presentation] 近傍銀河 NGC2782, NGC7727の中間赤外線観測 (2017)
  • Author(s): 尾中 敬
  • Organizer: 第34回Grain Formation Workshop
• [Presentation] 大質量星形成領域 S106 の未同定赤外 (UIR) バンドの観測 (2017)
  • Author(s): 木村 智幸, 左近 樹, 尾中 敬
  • Organizer: 日本天文学会2017年秋季年会
• [Presentation] The AKARI Phase 3 Near-infrared Spectroscopic Catalog of the Large Magellanic Cloud and the Stellar Spectroscopic Variability (2017)
  • Author(s): J. Zhang, T. Onaka, I.Sakon, F.Usui, T. Shimonishi, and Yoshifusa Ita
  • Organizer: 日本天文学会2017年秋季年会
• [Presentation] Mid-infrared observations of mergers: NGC2782 and NGC7727 (2017)
  • Author(s): T. Onaka, T. Nakamura, I. Sakon , R. Ohsawa, R. Wu, and H. Kaneda
  • Organizer: 日本天文学会2017年秋季年会
• [Presentation] 大質量星形成領域 S106 の未同定赤外 (UIR) バンドの観測 (2017)
  • Author(s): 木村 智幸, 左近 樹, 尾中 敬
  • Organizer: 日本天文学会2017年春季年会
• [Presentation] AKARI による星生成領域近赤外線氷吸収バンドの観測 (2017)
  • Author(s): 尾中 敬, 左近 樹, 木村 智幸, 下西 隆
  • Organizer: 日本天文学会2017年春季年会
• [Presentation] Analyses of the AKARI Phase 3 Prism Slitless Spectroscopic Data of the Large Magellanic Cloud (2017)
  • Author(s): Zhang, J., Onaka, T. Sakon, I., Usui, F., Shimonishi, T., and Ita, Y.
  • Organizer: 日本天文学会2017年春季年会
• [Presentation] ALMA Observations of a Hot Molecular Core in the Large Magellanic Cloud (2016)
  • Author(s): Shimonishi, T., Onaka, T., Kawamura, A., and Aikawa, Y.
  • Organizer: Molecular Gas in Galactic Environments
  • Int'l Joint Research
• [Presentation] Observations of water and methanol ices in the Large Magellanic Cloud (2016)
  • Author(s): Shimonishi, T., Dartois, E., Onaka, T., and Boulanger, F.
  • Organizer: Water in the Universe: from Clouds to Oceans
  • Int'l Joint Research
• [Presentation] AKARI mid-infrared all-sky survey: A New PAH emission map (2016)
  • Author(s): Onaka, T.
  • Organizer: AME workshop 2016
  • Int'l Joint Research
• [Presentation] The Infrared Detection of Deuterated PAHs in HII Regions (2016)
  • Author(s): Doney, K., Candian, A., Mori, T., Onaka, T., and Tielens, A. G. G. M.
  • Organizer: 71st International Symposium on Molecular Spectroscopy
  • Int'l Joint Research
• [Presentation] Analysis of ice absorption features towards YSOs candidates using AKARI (2016)
  • Author(s): Kimura, T., Onaka, T., Sakon, I., and Shimonishi, T.
  • Organizer: The 9th meeting on Cosmic Dust
  • Int'l Joint Research
• [Presentation] The origin of the broad 22 micron meter dust feature and its association with the molecular gas: a study of the PDR in the Great Nebula in Carina (2016)
  • Author(s): Wu, R., Onaka, T., Nakamura, T., Galliano, F., Le Petit, F., Bron, E., Usui, F., Sakon, I., Mori, T., Ishihara, D., and Okada, Y.
  • Organizer: The 9th meeting on Cosmic Dust
  • Int'l Joint Research
• [Presentation] Observations of a hot molecular core in a nearby low metallicity galaxy (2016)
  • Author(s): Shimonishi, T., Onaka, T., Kawamura, A., and Aikawa. Y.,
  • Organizer: The 9th meeting on Cosmic Dust
  • Int'l Joint Research
• [Presentation] Deuterated organic dust in spac (2016)
  • Author(s): Onaka, T., Mori, T., and Sakon, I.,
  • Organizer: The 9th meeting on Cosmic Dust
  • Int'l Joint Research
• [Presentation] Analysis of Ice absorption features toward YSOs candidates using AKARI (2016)
  • Author(s): Kimura, T., Onaka, T., Sakon, I., and Shimonishi, T.
  • Organizer: Workshop on Interstellar Matter 2016
  • Int'l Joint Research
• [Presentation] AKARI results on PAH emission (2016)
  • Author(s): Onaka, T.
  • Organizer: The Past and Future of AstroPAH Research
  • Int'l Joint Research / Invited
• [Presentation] AKARI を用いた YSO candidates の氷吸収の観測・解析 (2016)
  • Author(s): 木村 智幸, 尾中 敬, 左近 樹, 下西 隆
  • Organizer: 日本天文学会2016年秋季年会
• [Presentation] AKARI near-infrared spectroscopy of interstellar ices in Galactic star-forming regions (2016)
  • Author(s): 尾中 敬
  • Organizer: 第33回Grain Formation Workshop
• [Remarks] 東京大学大学院理学系研究科天文学専攻 尾中研究室
  • URL: http://komatta.astron.s.u-tokyo.ac.jp
• [Funded Workshop] he Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (2017)