Observations of submillimeter water masers with ALMA and VERA

• Project/Area Number: 24684011
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Astronomy
• Research Institution: National Astronomical Observatory of Japan
• Principal Investigator: HIROTA Tomoya 国立天文台, 水沢VLBI観測所, 助教 (10325764)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2012: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
• Keywords: 電波天文学 / 位置天文学 / 電波干渉計 / 星形成 / 星間分子 / メーザー / VERA / ALMA

Research Abstract

The present research carried out observational studies of the nearest massive star-forming region Orion KL by using VERA, a very long baseline interferometer operated by National Astronomical Observatory of Japan, and ALMA, an international millimeter/submillimeter interferometer just started regular operation. The research mainly focused on the centimeter, millimeter, and submillimeter water emission lines. As the result of the present research, some of the water lines were detected for the first time in Orion KL. Furthermore, the highest spatial resolution observations with VERA and ALMA revealed detailed physical, dynamical and chemical properties of a shocked molecular gas called Compact Ridge and a massive protostar Source I.

Research Products

• [Journal Article] A Hot Molecular Circumstellar Disk around the Massive Protostar Orion Source I (2014)
  • Author(s): Hirota T., Kim MK., Kurono Y., Honma M.
  • Journal Title: The Astrophysical Journal Letters Volume: 782 Issue: 2 Pages: L28-L28
  • DOI: 10.1088/2041-8205/782/2/l28
  • Peer Reviewed
• [Journal Article] VERAとALMAによるオリオンKLの詳細観測 (2013)
  • Author(s): 廣田朋也
  • Journal Title: 天文月報 Volume: Vol107, No7 Pages: 491-496
  • NAID: 10031184451
• [Journal Article] High-Resolution Observations of Centimeter/ (Sub)Millimeter H2O Masers in Orion KL with VERA and ALMA (2013)
  • Author(s): Hirota, T. et al ( authors)
  • Journal Title: ASP Conference Series Volume: 476 Pages: 327-328
• [Journal Article] High-Resolution Observations of Centimeter/(Sub)Millimeter H2O Masers in Orion KL with VERA and ALMA (2013)
  • Author(s): Hirota, T., Tsuboi, M., Fujisawa, K., Honma, M., Kawaguchi, N., Kim, M. K., Kobayashi, H., Kurono, Y., Imai, H., Omodaka, T., Shibata, K. M., Shimoikura, T., Yonekura, Y.
  • Journal Title: ASP Conference Series Volume: 476 Pages: 327-328
• [Journal Article] The First Detection of the 232 GHz Vibrationally Excited H2O Maser in Orion KL with ALMA (2012)
  • Author(s): Hirota, T., Kim, M. K., Honma, M.
  • Journal Title: The Astrophysical Journal Letters Volume: 757 Issue: 1 Pages: L1-L1
  • DOI: 10.1088/2041-8205/757/1/l1
  • Peer Reviewed
• [Presentation] Recent results of millimeter/ submillimeter observations of H2O and CH3OH masers (2014)
  • Author(s): Hirota, T.
  • Organizer: Workshop on Insterstellar Medium and Masers
  • Place of Presentation: 鹿児島大学(鹿児島県)
  • Year and Date: 2014-03-28
• [Presentation] ALMAによるオリオンKL電波源Iにおける星周ガス円盤の観測 (2014)
  • Author(s): 廣田朋也、金美京、黒野泰隆、本間希樹
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 国際基督教大学(東京都)
  • Year and Date: 2014-03-21
• [Presentation] ALMAによるオリオンKL天体の分子輝線観測 (2014)
  • Author(s): 廣田朋也
  • Organizer: 日本分光学会中部支部北陸ブロック富山大学講演会
  • Place of Presentation: 富山大学(富山県)
  • Year and Date: 2014-02-21
  • Invited
• [Presentation] Recent results of millimeter/submillimeter observations of H2O and CH3OH masers (2014)
  • Author(s): Hirota, T.
  • Organizer: Workshop on Insterstellar Medium and Masers
  • Place of Presentation: Kagoshima, Japan
• [Presentation] ALMA によるオリオンKL 天体の分子輝線観測 (2014)
  • Author(s): 廣田朋也
  • Organizer: 日本分光学会中部支部北陸ブロック
  • Place of Presentation: 富山、日本
  • Invited
• [Presentation] ALMAによるオリオンKL電波源Iにおける星周ガス円盤の観測 (2014)
  • Author(s): 廣田朋也、金美京、黒野泰隆、本間希樹
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 東京、日本
• [Presentation] ALMA Cycle 0 Observation of Orion Radio Source I (2013)
  • Author(s): Hirota, T.
  • Organizer: Orion Nebula Cluster as a Paradigm of Star Formation workshop
  • Place of Presentation: STScI(ボルチモア、アメリカ)
  • Year and Date: 2013-10-15
• [Presentation] ALMA Observations of the Millimeter/Submillimeter H2O Masers in Orion KL (2013)
  • Author(s): Hirota, T.
  • Organizer: Asia-Pacific regional URSI conference (AP-RASC)
  • Place of Presentation: Howard International House (台北、台湾)
  • Year and Date: 2013-09-05
• [Presentation] Observational Studies of H2O Maser Burst in Orion-KL with VERA and ALMA (2013)
  • Author(s): Hirota, T.
  • Organizer: A Neapolitan of Masers : Variability, Magnetism and VLBI
  • Place of Presentation: Sydney, Australia (CSIRO, シドニー, オーストラリア)
  • Year and Date: 2013-05-20
  • Invited
• [Presentation] ALMA cycle 0でのOrion KL領域スペクトル線観測の紹介 (2013)
  • Author(s): 廣田朋也
  • Organizer: 2012年度ALMA Workshop「宇宙と生命」
  • Place of Presentation: 国立天文台(東京都)
  • Year and Date: 2013-03-14
• [Presentation] ALMA cycle OでのOrion KL領域スペクトル線観測の紹介 (2013)
  • Author(s): 廣田朋也
  • Organizer: 2012年度ALMA Workshop 「宇宙と生命」
  • Place of Presentation: 国立天文台(東京都)
  • Year and Date: 2013-03-14
• [Presentation] ALMA early science of H2O masers in Orion KL (2013)
  • Author(s): Hirota, T.
  • Organizer: VERA-KVN science workshop
  • Place of Presentation: ソウル大学(ソウル、韓国)
  • Year and Date: 2013-01-30
• [Presentation] ALMA early science of H20 masers in Orion KL (2013)
  • Author(s): Hirota, T.
  • Organizer: VERA-KVN science workshop
  • Place of Presentation: ソウル大学(ソウル、韓国)
  • Year and Date: 2013-01-30
• [Presentation] ALMA Cycle 0 Observation of Orion Radio Source I (2013)
  • Author(s): Hirota, T.
  • Organizer: Orion Nebula Cluster as a Paradigm of Star Formation workshop
  • Place of Presentation: Baltimore, MD, USA
• [Presentation] ALMA Observations of the Millimeter/Submillimeter H2O Masers in Orion KL (2013)
  • Author(s): Hirota, T.
  • Organizer: Asia-Pacific regional URSI conference (AP-RASC)
  • Place of Presentation: Taipei, Taiwan
• [Presentation] Observational Studies of H2O Maser Burst In Orion-KL With VERA And ALMA (2013)
  • Author(s): Hirota, T.
  • Organizer: A Neapolitan of Masers: Variability, Magnetism and VLBI
  • Place of Presentation: Sydney, Australia
  • Invited
• [Presentation] Observations of the centimeter/ (sub)millimeter H2O masers in Orion KL with ALMA and VERA (2012)
  • Author(s): Hirota, T.
  • Organizer: The First Year of ALMA Science
  • Place of Presentation: Hotel Cumbres Patagonicas(プエルト・バラス、チリ)
  • Year and Date: 2012-12-13
• [Presentation] Observations of the centimeter/(sub)millimeter H20 masers 1n Orion KL with ALMA and VERA (2012)
  • Author(s): Hirota, T.
  • Organizer: The First Year of ALMA Science
  • Place of Presentation: Hotel Cumbres Patagonicas(フェルト・バラス、チリ)
  • Year and Date: 2012-12-13
• [Presentation] VLBI studies of nearby star-forming regions (2012)
  • Author(s): Hirota, T.
  • Organizer: NRO workshop Star Formation 2012
  • Place of Presentation: 国立天文台(東京都)
  • Year and Date: 2012-12-10
  • Invited
• [Presentation] VLBI studies of nearby star-forming regions (2012)
  • Author(s): Hirota, T.
  • Organizer: NRO workshop Star Formation 2012
  • Place of Presentation: 国立天文台(東京都)(招待講演)
  • Year and Date: 2012-12-10
• [Presentation] High-resolution Observations of Centimeter/(Sub)millimeter H2O masers in Orion KL with VERA and ALMA (2012)
  • Author(s): Hirota, T.
  • Organizer: New Trends in Radio Astronomy in the ALMA Era -The 30th Anniversary of Nobeyama Radio Observatory -
  • Place of Presentation: プリンス箱根(神奈川県)
  • Year and Date: 2012-12-03
• [Presentation] High-resolution Observations of Centimeter/(Sub)millimeter H2O masers in Orion KL with VERA and ALMA (2012)
  • Author(s): Hirota, T.
  • Organizer: New Trends in Radio Astronomy in the ALMA Era The 30th Anniversary of Nobeyama Radio Observatory
  • Place of Presentation: プリンス箱根(神奈川県)
  • Year and Date: 2012-12-03
• [Presentation] Observations of the millimeter/ submillimeter H2O masers in Orion KL (2012)
  • Author(s): Hirota, T.
  • Organizer: ALMA-J User's Meeting 2012
  • Place of Presentation: 国立天文台(東京都)
  • Year and Date: 2012-11-21
  • Invited
• [Presentation] Observations of the millimeter/submillimeter H2O masers in Orion KL (2012)
  • Author(s): Hirota, T.
  • Organizer: ALMA-U User's Meeting 2012
  • Place of Presentation: 国立天文台(東京都)(招待講演)
  • Year and Date: 2012-11-21
• [Presentation] VERA+ALMA Observations of the H2O Maser Burst in Orion KL (2012)
  • Author(s): Hirota, T.
  • Organizer: The 11th European VLBI Network Symposium
  • Place of Presentation: Chambre de Commerce et d'Industrie de Bordeaux(ボルドー、フランス)
  • Year and Date: 2012-10-09
• [Presentation] VERA+ALMA observations of the H2O maser burst in Orion KL (2012)
  • Author(s): Hirota, T.
  • Organizer: The 11the European VLBI Network Symposium
  • Place of Presentation: Chambre de Commerce et d Industrie de Bordeaux(ボルドー、フランス)
  • Year and Date: 2012-10-09
• [Presentation] ALMA cycle 0におけるオリオンKL領域の観測 (2012)
  • Author(s): 廣田朋也、本間希樹、金美京、黒野泰隆、坪井昌人、藤沢健太、今井裕、下井倉ともみ、米倉覚則
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 大分大学(大分県)
  • Year and Date: 2012-09-19
• [Presentation] ALMA Cycle 0におけるオリオンKL領域の観測 (2012)
  • Author(s): 廣田朋也、本間美樹、金美京、黒野泰隆、坪井昌人、藤沢健太、今井裕、下井倉ともみ、米倉覚則
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 大分大学(大分県)
  • Year and Date: 2012-09-19
• [Presentation] Orion KL領域SVデータ解析の例 (2012)
  • Author(s): 廣田朋也
  • Organizer: 2012年度ALMA Workshop「宇宙と生命」
  • Place of Presentation: 国立天文台(東京都)
  • Year and Date: 2012-06-21
• [Presentation] ALMA cycle 1におけるサブミリ波水メーザー観測案 (2012)
  • Author(s): 廣田朋也
  • Organizer: 2012年度ALMA Workshop「ミリ秒角の高空間分解能観測による新たなサイエンスの開拓」
  • Place of Presentation: 国立天文台(東京都)
  • Year and Date: 2012-06-07
• [Presentation] VERA+ALMA observations of the H2O maser burst in Orion KL (2012)
  • Author(s): Hirota, T.
  • Organizer: East Asia VLBI Workshop 2012
  • Place of Presentation: 台湾中央研究院天文及天文物理研究所(台北、台湾)
  • Year and Date: 2012-06-01
• [Remarks]
  • URL: http://alma.mtk.nao.ac.jp/j/news/pressrelease/201210236888.html
• [Remarks]
  • URL: http://www.miz.nao.ac.jp/vera/content/pr/pr20140304/c01
• [Remarks] 大質量星もガス円盤から誕生？～大質量星を回る高温水蒸気のガス円盤を発見
  • URL: http://www.miz.nao.ac.jp/vera/content/pr/pr20140304/c01
• [Remarks]
  • URL: http://alma.mtk.nao.ac.jp/j/news/pressrelease/201210236888.html