AKARI observation of interstellar ice

• Project/Area Number: 19740103
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Astronomy
• Research Institution: Kobe University
• Principal Investigator: AIKAWA Yuri 神戸大学, 理学研究科, 准教授 (40324909)
• Project Period (FY): 2007 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥2,680,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥480,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2008: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2007: ¥600,000 (Direct Cost: ¥600,000)
• Keywords: 星間物質 / 赤外線天文学 / 天文学 / 星間化学 / 星形成 / 分子雲

Research Abstract

We performed spectroscopic observation towards (1) edge-on YSOs and (2) field stars behind the molecular clouds at 2-5 micron with the resolution of δλ/λ~100. AKARI can observe ice bands which cannot be observed from the ground, such as 4micron CO_2 band. We have detected H_2O, CO_2 and CO ice absorptions. The CO_2/H_2O ratio is consistent with the previous studies which used CO2 band at longer wavelength. We also detected strong absorption which coincides with XCN band towards edge-on YSOs. It could be formed by photolysis via UV radiation from YSO. Towards the molecular cloud L1517A, we derived spectrum towards more than 10 field stars. We show that H_2O column density correlate well with extinction (Av).

Research Products

• [Journal Article] AKARI observations of ice absorption bands towards edge-on young stellar object (2012)
  • Author(s): Aikawa, Y., Kamuro, D., Sakon, I., Itoh, Y., Terada, H., Noble, J. A., Pontoppidan, K. M., Fraser, H. J., Tamura, M., Kandori, R., Kawamura, A., Ueno, M.
  • Journal Title: Astronomy & Astrophysic Volume: 538 Pages: 57-68
  • Peer Reviewed
• [Journal Article] AKARI observations of ice absorption bands towards edge-on young stellar objects (2012)
  • Author(s): Aikawa, Y., Kamuro, D., Sakon, L., Itoh, Y., Terada, H., Noble, J.A., Pontoppidan, K.M., Fraser, H.J., Tamura, M., Kandori, R., Kawamura, A., Ueno, M.
  • Journal Title: Astronomy and Astrophysics Volume: 538 Pages: 57-68
  • Peer Reviewed
• [Journal Article] Carbon Isotope and Isotopomer Fractionation in Cold Dense Cloud Cores (2011)
  • Author(s): Furuya, K., Aikawa, Y., Sakai, N., Yamamoto, S.
  • Journal Title: The Astrophysical Journal Volume: (in press)
  • Peer Reviewed
• [Journal Article] 2D mapping of ice species in molecular cores (2010)
  • Author(s): Noble, J.A., Fraser, H., Pontoppidan, K.M., Aikawa, Y., Sakon, I.
  • Journal Title: Highlights of Astronomy Volume: 15 Pages: 730-730
• [Journal Article] Observation of interstellar and circumstellar ice (2009)
  • Author(s): Aikawa, Y., Noble, J. A., Sakon, I., Kamuro, D., Irimichi, N., Pontoppidan, K. M., Fraser, H., Tamura, M., Terada, H.; Ueno, M. and AFSAS Team
  • Journal Title: Astronomical Society of the Pacific, Cenference Serie Volume: 418 Pages: 47-54
• [Journal Article] Probing the Chemistry of Molecular Cores: 2.5-5□m AKARI Grism Spectroscopy of Young Stellar Objects in B35 (2009)
  • Author(s): Noble. J.A., Aikawa, Y., Fraser, H.J., Pontoppidan, K.M., & Sakon, I
  • Journal Title: Astronomical Society of the Pacific, Cenference Series Volume: 418 Pages: 411-414
• [Journal Article] Observation of interstellar and circumstellar ice (2009)
  • Author(s): Aikawa, Y., et al. (10authors)
  • Journal Title: Astronomical Society of the Pacific, Cenference Series 418 Pages: 47-54
• [Journal Article] Probing the Chemistry of Molecular Cores: 2. 5-5μm AKARI Grism Spectroscopy of Young Stellar Objects in B35A (2009)
  • Author(s): Noble. J.A., Aikawa, Y., Fraser, H.J., Pontoppidan, K.M., Sakon, I.
  • Journal Title: Astronomical Society of the Pacific, Cenference Series 418 Pages: 411-414
• [Presentation] AKARI observations of ice absorption bands towards edge-on YSOs (poster) (2011)
  • Author(s): Aikawa, Y.
  • Organizer: IAU Symposium 280: The Molecular Universe
  • Place of Presentation: Toledo, Spain
• [Presentation] AKARI observations of ice absorption bands towards edge-on YSOs (2011)
  • Author(s): Aikawa, Y.
  • Organizer: IAU Symposium 280 : The Molecular Universe
  • Place of Presentation: Toledo, Spain
• [Presentation] Ice observation towards low-mass edge-on YSOs and background stars (2011)
  • Author(s): 相川祐理
  • Organizer: あかりによる我々の銀河系及び系外銀河の星間物質の研究会
  • Place of Presentation: 東京大学本郷キャンパス(招待講演)
• [Presentation] 赤外線天文衛星AKARIによる星間氷の空間分布観測 (2011)
  • Author(s): 相川祐理
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 筑波大学(茨城県)(口頭・ポスター発表)
• [Presentation] AKARI observations of ice absorption bands towards edge-on YSOs (2010)
  • Author(s): Aikawa, Y.
  • Organizer: Small Discussion Meeting on Astrochemistry
  • Place of Presentation: 東京大学(東京都)(口頭発表)
  • Year and Date: 2010-08-18
• [Presentation] 星・惑星系形成過程におけるガス・氷組成 (2010)
  • Author(s): 相川祐理
  • Organizer: ALMA-Subaru Workshop 2010 (宇宙・銀河・星・惑星・生命の誕生)
  • Place of Presentation: 国立天文台(三鷹)
• [Presentation] 「あかり」による低質量YSO周囲の星間氷観測 (2010)
  • Author(s): 相川祐理
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 広島大学(口頭発表)
• [Presentation] Astrochemistry in low-mass star formation (2010)
  • Author(s): Aikawa, Y.
  • Organizer: ISM2010
  • Place of Presentation: Nagoya Univ(invited)
• [Presentation] Reaction network models and astrochemistry in star-forming regions (2010)
  • Author(s): Aikawa, Y.
  • Organizer: International Workshop on Merged-Beam Experiments
  • Place of Presentation: 首都大学東京(東京都)(invited talk)
• [Presentation] Hydrocarbon chemistry in star-forming regions and protoplanetary disks (2010)
  • Author(s): Aikawa, Y.
  • Organizer: The Methane Balance : Formation and Destruction Processes on Planets, their Satellites and in the Interstellar Medium
  • Place of Presentation: International Space Science Institute (Bern)(oral)
• [Presentation] AKARI Observations of Ice Absorption Bands towards Edge-on YSOs (2010)
  • Author(s): Aikawa, Y.
  • Organizer: Workshop on Interstellar Matter 2010
  • Place of Presentation: 北海道大学低温研究所(北海道)(ポスター発表)
• [Presentation] 星・惑星系形成過程におけるガス・氷組成 (2010)
  • Author(s): Aikawa, Y.
  • Organizer: ALMA-Subaru Workshop 2010(宇宙・銀河・星・惑星・生命の誕生)
  • Place of Presentation: 国立天文台(東京都)(招待講演)
• [Presentation] 赤外線天文衛星「あかり」による原始惑星系円盤の氷観測 (2009)
  • Author(s): 鹿室大、相川祐理、伊藤洋一, ほか
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 大阪府立大学(口頭+ボスター)
  • Year and Date: 2009-03-26
• [Presentation] AKARI, a light to illuminate the misty Universe (2009)
  • Author(s): Aikawa, Y.
  • Organizer: Observation of interstellar and circumstellar ice(invited)
  • Place of Presentation: 東京大学
• [Presentation] Workshop on Chemical Diagnostics of Star and Planet Formation (2009)
  • Author(s): Aikawa, Y.
  • Organizer: AKARI Observation of Interstellar Ice
  • Place of Presentation: Univ of Tokyo(invited)
• [Presentation] Observation of interstellar andcircumstellar ice (2009)
  • Author(s): Aikawa, Y.
  • Organizer: AKARI, a light to illuminate the misty Universe
  • Place of Presentation: Univ of Tokyo(invited)
• [Presentation] Observation of interstellar and circumstellar ice (2009)
  • Author(s): Aikawa, Y.
  • Organizer: AKARI, a light to illuminate the misty Universe
  • Place of Presentation: 東京大学(招待講演)
• [Presentation] AKARI Observation of Interstellar Ice (2009)
  • Author(s): Aikawa, Y.
  • Organizer: Workshop on Chemical Diagnostics of Star and Planet Formation
  • Place of Presentation: 東京大学(招待講演)
• [Presentation] 『あかり』による原始惑星形成円盤の氷観測 (2008)
  • Author(s): 鹿室大, 相川祐理, 伊藤洋一, 寺田宏
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 国立オリンピック記念青少年総合センター
• [Presentation] AFSASチーム「『あかり』による星間氷吸収バンドの観測」 (2008)
  • Author(s): 相川祐理、鹿室大、入道直樹
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 国立オリンピック記念青少年総合センター
• [Presentation] 『あかり』による星間氷吸収バンドの観測 (2008)
  • Author(s): 相川祐理、鹿室大、入道直樹、AFSASチーム
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 国立オリンピック記念青少年総合センター
• [Presentation] 「あかり」による原始惑星形成円盤の氷観測 (2008)
  • Author(s): 鹿室大、相川祐理、伊藤洋一、寺田宏
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 国立オリンピック記念青少年総合センター
• [Presentation] AKARI Observation of Interste11ar Ice (2008)
  • Author(s): Aikawa, Y.
  • Organizer: Workshop for Interstellar Matter 2008
  • Place of Presentation: 北海道大学低温科学研究所(ポスター)
• [Presentation] 「あかり」による原始惑星系円盤の氷観測 (2008)
  • Author(s): 鹿室大, 相川祐理, 伊藤洋一, ほか
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 岡山理科大学(口頭+ポスター)
• [Presentation] 星間雲での主要な分子組成と同位体分別 (2008)
  • Author(s): 相川祐理
  • Organizer: 日本地球化学会年会
  • Place of Presentation: 東京大学(招待講演)