The Nuclear Dynamics in Nearby Galaxies with Radio Interferometry

• Project/Area Number: 20740108
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Astronomy
• Research Institution: Yamaguchi University
• Principal Investigator: SAWADA Satoko Yamaguchi University, 水沢VLBI観測所, 研究員 (00452631)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: 電波天文学 / 銀河 / 活動銀河核 / 質量降着 / 分子ガス / メーザー

Research Abstract

This research aims at revealing the mass accretion process from galactic scale into a black hole, obtaining the gas dynamics in the galactic nuclear region of galaxies with the interferometry and VLBI. Our observations reveal CO velocity fields within the inner 1kpc of nearby galaxies NGC1097 and Arp220, which show the different rotation axis and velocity from those of their galactic rotation. Our VLBI observations toward the center of Arp220 detected a compact source in 1pc scale with high brightness temperature (>10^6K), and it suggests the existence of active galactic nucleus. Furthermore, our VLBI observations toward the nuclear region of an elliptic galaxy NGC1052 imply that water masers are associated with a circumnuclear plasma torus and such circumnuclear structure could be the source of accretion onto the central engine. We carried out the surveys towards AGN and galaxies as new tracers, and showed no detection.

Research Products

• [Journal Article] Annual Parallax Measurements of an Infrared Dark Cloud MSXDC G034.43+00.24 with VERA (2011)
  • Author(s): Kurayama, T., Nakagawa, A., Sawada-Satoh, S., Sato, K., Honma, M., Sunada, K., Hirota, T., Imai, H.
  • Journal Title: Publications of the Astronomical Society of Japan 63 Pages: 513-525
  • Peer Reviewed
• [Journal Article] Internal Proper Motions of Methanol Masers at 6.7GHz in Massive Star-Forming Region Onsala 1 (2011)
  • Author(s): Sugiyama, K., Fujisawa, K., Doi, A., Honma, M., Isono, Y., Kobayashi, H., Mochizuki, N., Murata, Y., Sawada-Satoh, S., Wajima, K.
  • Journal Title: Publications of the Astronomical Society of Japan 63 Pages: 53-61
  • Peer Reviewed
• [Journal Article] Internal Proper Motions of Methanol Masers at 6.7 GHz in Massive Star Forming Region Onsala 1 (2011)
  • Author(s): Sugiyama, K., Fujisawa, K., Doi, A., Honma, M., Isono, Y., Kobayashi, H., Mochizuki, N., Murata, Y., Sawada-Satoh S., Wajima, K.
  • Journal Title: Publ.Astron.Soc.Japan Volume: 63 Pages: 53-61
  • Peer Reviewed
• [Journal Article] Annual Parallax Measurements of an Infrared Dark Cloud MSXDC G034.43+00.24 with VERA (2011)
  • Author(s): Kurayama, T., Nakagawa, A., Sawada-Satoh S., Sato, K., Honma, M., Sunada, K., Hirota, T., Imai, H.
  • Journal Title: Publ.Astron.Soc.Japan Volume: 63(In press)
  • Peer Reviewed
• [Journal Article] SMA 12CO(J=6-5) and 435 um Interferometric Imaging of the Nuclear Region of Arp 220 (2009)
  • Author(s): Matsushita, S., Iono, D., Petitpas, G.R., Chou, R.C.-Y., Gurwell, M.A., Hunter, T.R, Muller, S., Lim J., Peck, A.B., Sakamoto, K., Sawada-Satoh, S., Wiedner, M.C., Wilner, D.J., Wilson, C.D.
  • Journal Title: The Astrophysical Journal 693 Pages: 56-68
  • Peer Reviewed
• [Journal Article] H_2O maser and a plasma obscuring torus in the radio galaxy NGC 1052 (2009)
  • Author(s): Sawada-Satoh, S., Kameno, S., Nakamura, K.Namikawa, D., Shibata, K.M., Inoue, M.
  • Journal Title: Astronomische Nachrichten 330 Pages: 249-252
  • Peer Reviewed
• [Journal Article] Plasma and Molecular Tori in the Active Galaxy NGC 1052 (2009)
  • Author(s): Nakamura, K., et al.
  • Journal Title: Approaching Micro-Arcsecond Resolution with VSOP-2 : Astrophysics and Technologies ASP Conference Series, proceedings of the conference held 3-7 December, 2007, at ISAS/JAXA, Sagamihara, Kanagawa, Japan. Edited by Yoshiaki Hagiwara, Ed Fomalont, Masato Tsuboi, and Yasuhiro Murata. 402 Pages: 116-119
• [Journal Article] Spatial Distribution of an AGN Plasma Torus with 0.04-parsec Resolution (2009)
  • Author(s): Namikawa, D., et al.
  • Journal Title: Approaching Micro-Aresecond Resolution with VSOP-2 : Astrophysics and Technologies ASP Conference Series, proceedings of the conference held 3-7 December, 2007, at ISAS/JAXA, Sagamihara, Kanagawa, Japan. Edited by Yoshiaki Hagiwara, Ed Fomalont, Masato Tsuboi, and Yasuhiro Murata. 402 Pages: 120-122
• [Journal Article] Structure and Kinematics of CO (2-1) Emission in the Central Region of NGC 4258 (2009)
  • Author(s): Sawada-Satoh, S., et al.
  • Journal Title: Approaching Micro-Arcsecond Resolution with VSOP-2 : Astrophysics and Technologies ASP Conference Series, proceedings of the conference held 3-7 December, 2007, at ISAS/JAXA, Sagamihara, Kanagawa, Japan. Edited by Yoshiaki Hagiwara, Ed Fomalont, Masato Tsuboi, and Yasuhiro Murata. 402 Pages: 123-126
• [Journal Article] Positional Coincidence of H_2O Maser and a Plasma Obscuring Torus in the Radio Galaxy NGC 1052 (2009)
  • Author(s): Sawada-Satoh, S., et al.
  • Journal Title: Approaching Micro-Aresecond Resolution with VSOP-2 : Astrophysics and Technologies ASP Conference Series, proceedings of the conference held 3-7 December, 2007, at ISAS/JAXA, Sagamihara, Kanagawa, Japan. Edited by Yoshiaki Hagiwara, Ed Fomalont, Masato Tsuboi, and Yasuhiro Murata. 402 Pages: 127-130
• [Journal Article] The Kinematics of the Methanol Maser at 6.7 GHz in Cepheus A (2009)
  • Author(s): Sugiyama, K., et al.
  • Journal Title: Approaching Micro-Aresecond Resolution with VSOP-2: Astrophysics and Technologies ASP Conference Series, proceedings of the conference held 3-7 December, 2007, at ISAS/JAXA, Sagamihara, Kanagawa, Japan. Edited by Yoshiaki Hagiwara, Ed Fomalont, Masato Tsuboi, and Yasuhiro Murata. 402 Pages: 392-395
• [Journal Article] H_2O maser and a plasma obscuring torus in the radio galaxy NGC 1052 (2009)
  • Author(s): Sawada-Satoh, S., et.al.
  • Journal Title: Astronomische Nachrichten 330 Pages: 249-252
  • Peer Reviewed
• [Journal Article] SMA 12CO(J=6-5) and 435 um Interferometric Imaging of the Nuclear Region of Arp 220 (2009)
  • Author(s): Matsushita, S., et.al.
  • Journal Title: The Astrophysical Journal 693 Pages: 56-68
  • Peer Reviewed
• [Journal Article] Interferometric 12CO J=2-1 Image of the Nuclear Region of Seyfert 1 Galaxy NGC 1097 (2008)
  • Author(s): Hsieh, P.-Y., Matsushita, S., Lim, J., Kohno, K., Sawada-Satoh, S.
  • Journal Title: The Astrophysical Journal 683 Pages: 70-77
  • Peer Reviewed
• [Journal Article] Positional Coincidence of H_2O Maser and a Plasma-Obscuring Torus in Radio Galaxy NGC 1052 (2008)
  • Author(s): Sawada-Satoh, S., Kameno, S., Nakamura, K.Namikawa, D., Shibata, K.M., Inoue, M.
  • Journal Title: The Astrophysical Journal 680 Pages: 191-199
  • Peer Reviewed
• [Journal Article] Positional Conincidence of H_2O Maser and a Plasma-Obscuring Torus in Radio Galaxy NGC 1052 (2008)
  • Author(s): Sawada-Satoh, S., et.al.
  • Journal Title: The Astrophysical Journal 680 Pages: 191-199
  • Peer Reviewed
• [Journal Article] Interferometric 12CO J=2-1 Image of the Nuclear Region of Seyfert 1 Galaxy NGC 1097 (2008)
  • Author(s): Hsieh, P.-Y., et.al.
  • Journal Title: The Astrophysical Journal 683 Pages: 70-77
  • Peer Reviewed
• [Presentation] AGN における22GHz アンモニア吸収線VLBI 観測 (2010)
  • Author(s): 澤田-佐藤聡子
  • Organizer: 大学VLBI連携・東アジアVLBI 観測網ワークショップ
  • Place of Presentation: 山口大学、山口
  • Year and Date: 2010-11-12
• [Presentation] AGN における22GHzアンモニア吸収線VLBI観測 (2010)
  • Author(s): 澤田-佐藤聡子
  • Organizer: 大学VLBI連携・東アジアVLBI観測網ワークショップ
  • Place of Presentation: 山口大学、山口
  • Year and Date: 2010-11-12
• [Presentation] JVN用天体構造遅延時間効果計算ソフトウェアJADESS (2010)
  • Author(s): 澤田一佐藤聡子
  • Organizer: 日本天文学会
  • Place of Presentation: 広島大学、広島
  • Year and Date: 2010-03-24
• [Presentation] KVN による AGN 周囲の分子トーラス (2010)
  • Author(s): 澤田-佐藤聡子
  • Organizer: ミニワークショップ:KVN-山口アレイで狙うサイエンス
  • Place of Presentation: 山口大学、山口
  • Year and Date: 2010-03-16
• [Presentation] KVNによるAGN周囲の分子トーラス (2010)
  • Author(s): 澤田一佐藤聡子
  • Organizer: ミニワークショップ:KVN-山ロアレイで狙うサイエンス
  • Place of Presentation: 山口大学、山口
  • Year and Date: 2010-03-16
• [Presentation] Methanol Maser Outfolws of UCHII Region S269 (2010)
  • Author(s): Sawada-Satoh, S.
  • Organizer: Great Barriers in High Mass Star Formation
  • Place of Presentation: Townsville, Australia
• [Presentation] JVN Analysis and Display for Effects of Source Structure (JADESS) (2010)
  • Author(s): Sawada-Satoh, S.
  • Organizer: East Asia VLBI Workshop 2010
  • Place of Presentation: 鹿児島大学、鹿児島
• [Presentation] Progress Reports of KVN+VERA Test Observations (2010)
  • Author(s): Sawada-Satoh, S.
  • Organizer: 2010 KVN and TRAO Radio Workshop
  • Place of Presentation: 延世大学、ソウル、韓国(招待講演)
• [Presentation] Methanol Maser Outflows of UCHII Region S269 (2010)
  • Author(s): Sawada-Satoh, S., Fujisawa, K., Wajima, K., Sugiyama, K., Honma, M.
  • Organizer: Great Barriers in High Mass Star Formation
  • Place of Presentation: Townsville, Australia
• [Presentation] 東アジアVLBI観測網(2):初期観測網整備と進捗状況 (2010)
  • Author(s): 澤田-佐藤聡子、宮崎敦史、小林秀行、川口則幸、Lee S.S., Sohn B.W., KVNグループ、沈志強、凌権宝、上海天文台VLBIグループ
  • Organizer: 日本天文学会 2010年秋季年会
  • Place of Presentation: 金沢大学、石川
• [Presentation] Preliminary Imaging of the KVN+VERA Test Observations (2010)
  • Author(s): Sawada-Satoh S., Miyazaki, A., Kobayashi, H., Kawaguchi, N., Lee S.S., Kim K.T., Sohn, B.W., Byun, D.Y., Oh, C.S., Jung T.H.
  • Organizer: The 8^<th> East Asia Meeting on Astronomy
  • Place of Presentation: 上海、中国
• [Presentation] Preliminary Imaging of the KVN+VERA Test Observations (2010)
  • Author(s): 澤田-佐藤聡子, 宮崎敦史, 小林秀行, 川口則幸, Lee S.S.,Kim K.T., Sohn, B.W., Byun, D.Y., Oh, C.S., Jung T.H.
  • Organizer: VLBI懇談会シンポジウム
  • Place of Presentation: 高萩、茨城
• [Presentation] UCHII領域S269の6.7GHzメタノールメーザーアウトフロー (2009)
  • Author(s): 澤田一佐藤聡子
  • Organizer: VLBI懇談会シンポジウム
  • Place of Presentation: 奥州宇宙遊学館、岩手
  • Year and Date: 2009-12-03
• [Presentation] JVN用天体構造遅延時間効果計算ソフトウェア (2009)
  • Author(s): 澤田一佐藤聡子
  • Organizer: VLBI懇談会シンポジウム
  • Place of Presentation: 奥州宇宙遊学館、岩手
  • Year and Date: 2009-12-03
• [Presentation] 高分解能サブミリ波マッピングによる近傍銀河の100pcスケール動力学:銀河円盤と中心核円盤のミッシングリンク (2009)
  • Author(s): 澤田一佐藤聡子
  • Organizer: NROワークショップ:高精度ミリ波・サブミリ波観測と最新理論モデルによる近傍銀河の構造の解明
  • Place of Presentation: 鹿児島大学、鹿児島
  • Year and Date: 2009-11-17
• [Presentation] UCHII領域S269の6.7GHzメタノールメーザーアウトフロー (2009)
  • Author(s): 澤田一佐藤聡子
  • Organizer: 日本天文学会
  • Place of Presentation: 山口大学、山口
  • Year and Date: 2009-09-14
• [Presentation] UCHII領域S269の6.7GHzメタノールメーザーアウトフロー (2009)
  • Author(s): 澤田一佐藤聡子
  • Organizer: 第7回VERAユーザーズミーティング
  • Place of Presentation: 国立天文台三鷹、東京
  • Year and Date: 2009-09-02
• [Presentation] 高分解能サブミリ波マッピングによる近傍銀河の 100pc スケール動力学:銀河円盤と中心核円盤のミッシングリンク (2009)
  • Author(s): 澤田-佐藤聡子
  • Organizer: NRO ワークショップ:高精度ミリ波・サブミリ波観測と最新理論モデルによる近傍銀河の構造の解明
  • Place of Presentation: 鹿児島大学、鹿児島
• [Presentation] 山口32m 望遠鏡による局部銀河群内の6.7GHz メタノールメーザー源探査 (2009)
  • Author(s): 澤田-佐藤聡子
  • Organizer: 日本天文学会
  • Place of Presentation: 大阪府立大学、大阪
• [Presentation] Imaging of 6.7 GHz Methanol Maser Source S 269 with the Japanese VLBI Network (2009)
  • Author(s): Sawada-Satoh, S.
  • Organizer: 2009 East Asia VLBI Workshop.
  • Place of Presentation: 梨花女子大学校, ソウル, 韓国
• [Presentation] 電波銀河NGC 1052の水メーザーとプラズマトーラス (2009)
  • Author(s): 澤田-佐藤聡子
  • Organizer: AGNミニワークショップ
  • Place of Presentation: 北海道大学、北海道
• [Presentation] Imaging of 6.7 GHz Methanol Maser Source S 269 with the Japanese VLBI Network (2009)
  • Author(s): Sawada-Satoh, S.
  • Organizer: 2009 East Asia VLBI Workshop
  • Place of Presentation: 梨花女子大学校, ソウル, 韓国
• [Presentation] 山口32m望遠鏡による局部銀河群内の6.7GHzメタノールメーザー源探査 (2009)
  • Author(s): 澤田-佐藤聡子
  • Organizer: 日本天文学会
  • Place of Presentation: 大阪府立大学、大阪
• [Presentation] Extragalactic Methanol Maser (2008)
  • Author(s): Sawada-Satoh, S.
  • Organizer: East Asia VLBI Mini Workshop Science of the methanol maser.
  • Place of Presentation: 上海天文台、中国
• [Presentation] VSOP-2 で追う近傍AGN の質量降着過程 (2008)
  • Author(s): 澤田-佐藤聡子
  • Organizer: 国立天文台ワークショップ:超高分解能で見る星間メーザー
  • Place of Presentation: 宇宙航空研究開発機構、宇宙科学研究本部、神奈川
• [Presentation] Imaging of 6.7 GHz Methanol Maser Sources with the Japanese VLBI Network (2008)
  • Author(s): Sawada-Satoh, S.
  • Organizer: The 9th European VLBI Network.
  • Place of Presentation: INAF, Bologna, Italy
• [Presentation] H2O maser and a plasma obscuring torus in the radio galaxy NGC 1052 (2008)
  • Author(s): Sawada-Satoh, S.
  • Organizer: The 4th CSS/GPS Workshop.
  • Place of Presentation: Riccione, Italy
• [Presentation] H 2 O maser and a plasma obscuring torus in the radio galaxy NGC 1052 (2008)
  • Author(s): Sawada-Satoh, S.
  • Organizer: The 4th CSS/GPS Workshop
  • Place of Presentation: Riccione, Italy
• [Presentation] VLBAがもたらした近傍銀河中心核の動力学 (2008)
  • Author(s): 澤田-佐藤聡子
  • Organizer: 国立天文台ワークショップ「VLBAと日本のVLBI天文学」
  • Place of Presentation: 国立天文台三鷹、東京
• [Presentation] Imaging of 6.7 GHz Methanol Maser Sources with the Japanese VLBI Network (2008)
  • Author(s): Sawada-Satoh, S.
  • Organizer: The 9th European VLBI Network
  • Place of Presentation: INAF, Bologna, Italy
• [Presentation] VSOP-2で追う近傍AGNの質量降着過程 (2008)
  • Author(s): 澤田-佐藤聡子
  • Organizer: 国立天文台ワークショップ「超高分解能で見る星間メーザー」
  • Place of Presentation: 宇宙航空研究開発機構、宇宙科学研究本部、神奈川
• [Presentation] Extragalactic Methanol Maser (2008)
  • Author(s): Sawada-Satoh, S.
  • Organizer: East Asia VLBI Mini-Workshop-Science of the methanol maser
  • Place of Presentation: 上海天文台、中国
• [Presentation] 山口32m 望遠鏡による局部銀河群内の6.7GHz メタノールメーザー源探査II
  • Author(s): 澤田-佐藤聡子
  • Organizer: 日本天文学会2011年春季年会予稿
  • Place of Presentation: 筑波大学(開催中止)
• [Presentation] 山口32m望遠鏡による局部銀河群内の6.7GHzメタノールメーザー源探査II
  • Author(s): 澤田-佐藤聡子、藤沢健太、輪島清昭、杉山孝一郎、鍋谷絹世、門田晶子、青木望、笠井伸太郎、岸川泰之、志野渚、菅由利恵、杉原恭平、田中真人、宮村太基
  • Organizer: 日本天文学会2011年春季年会
  • Place of Presentation: (開催中止 予稿)