A study of the magnetic flotation loops in the Galactic centre

2010 Fiscal Year Final Research Report

• Project/Area Number: 20244014
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: Nagoya University
• Principal Investigator: FUKUI Yasuo 名古屋大学, 大学院・理学研究科, 法人,教授 (30135298)
• Co-Investigator(Kenkyū-buntansha): MATSUMOTO Ryoji 千葉大学, 理学研究科, 教授 (00209660) ; NOZAWA Satoshi 茨城大学, 理工学研究科, 准教授 (10261736) ; KAWAMURA Akiko 名古屋大学, 理学研究科, 准教授 (30377931) ; MIZUNO Norikazu 名古屋大学, 理学研究科, 助教 (20372526)
• Co-Investigator(Renkei-kenkyūsha): MACHIDA Mami 九州大学, 理学研究院, 助教 (50455200) ; TORII Kazufumi 名古屋大学, 大学院・理学研究科, 研究員 (20444383)
• Project Period (FY): 2008 – 2010
• Keywords: 電波天文台 / 星間分子雲 / 理論天文学 / 銀河中心 / 磁気浮上グループ

Research Abstract

Observations of high transition CO line have been carried out toward Galactic molecular loops 1 and 2 in the Galactic center with NANTEN2 and ASTE telescope. Physical parameters such as temperature, density and kinematics of molecular clouds associated to the loops are revealed. This indicates that foot points of the loops are possibly one of origins of high temperature and high velocity dispersion of the clouds in the Galactic center region. In addition, 13 loops candidates are identified by large scale search toward the Galactic center. Numerical simulation has revealed the process of formation, nature and distribution of the loops.

Research Products

• [Journal Article] Stochastic Acceleration of Cosmic Rays in the Central Molecular Zone of the Galaxy (2011)
  • Author(s): Amano, T., Torii, K., Hayakawa, T., Fukui, Y.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol.63 Pages: 63-66
  • Peer Reviewed
• [Journal Article] High Excitation Molecular Gas in the Galactic Center Loops ;^<12> CO(J=2. 1 and J=3. 2) Observations (2011)
  • Author(s): Kudo, N.(1番目), Torii, K.(2番目), Machida, M.(3番目), Kawamura, A.(10番目), Nozawa, S.(19番目), Matsumoto, R.(20番目), Fukui, Y.(21番目), 総著者数=21名
  • Journal Title: Publications of the Astronomical Society of Japan Volume: vol.63 Pages: 171-197
  • Peer Reviewed
• [Journal Article] Supershells as Molecular Cloud Factories : Parsec Resolution Observations of H I and^<12> CO(J=1-0) in GSH 287+04-17 and GSH 277+00+36 (2011)
  • Author(s): Dawson, J. R., McClure-Griffiths, N. M., Kawamura. A., Mizuno, N., Onishi, T, , Mizuno, A., Fukui, Y.
  • Journal Title: The Astrophysical Journal Volume: Vol.728 Pages: 127
  • Peer Reviewed
• [Journal Article] A Detailed Observational Study of Molecular Loops 1 and 2 in the Galactic Center (2010)
  • Author(s): Torii, K.(1番目), Kawamura, A.(6番目), Machida, M.(10番目), Nozawa, S.(12番目), Matsumoto, R.(13番目), Fukui, Y.(14番目), 総著者数=14名
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol.62 Pages: 1307-1332
  • Peer Reviewed
• [Journal Article] Molecular Clouds in Nearby Galaxies (2010)
  • Author(s): Fukui, Y., Kawamura, A.
  • Journal Title: Annual Review of Astronomy and Astrophysics Volume: vol.48 Pages: 547-580
  • Peer Reviewed
• [Journal Article] Temperature and Density in the Foot Points of the Molecular Loops in the Galactic Center ; Analysis of Multi-J Transitions of12CO(J=1-0, 3-2, 4-3, 7-6), 13CO(J=1-0) and C18O(J=1-0) (2010)
  • Author(s): Torii, K.(1番目), Kawamura, A.(7番目), Machida, M.(10番目), Nozawa, S.(12番目), Matsumoto, R.(13番目), Fukui, Y.(25番目), 総著者数=25名
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol.62 Pages: 675-695
• [Journal Article] Molecular and Atomic Gas in the Large Magellanic Cloud. II. Three-dimensional correlation Between CO and HI (2009)
  • Author(s): Fukui, Y.(1番目), Kawamura, A.(2番目), 総著者数=13名
  • Journal Title: TheAstrophysical Journal Volume: Vol.705 Pages: 144-155
  • Peer Reviewed
• [Journal Article] The Second Survey of the Molecular Clouds in the Large Magellanic Cloud by NANTEN. II. Star Formation (2009)
  • Author(s): Kawamura, A., Mizuno, Y., Minamidani, T., Filipovi., M. D., Staveley-Smith, L., Kim, S., Mizuno, N., Onishi, T., Mizuno, A., Fukui, Y.
  • Journal Title: The Astrophysical Journal Supplement Volume: Vol.184 Pages: 1-17
  • Peer Reviewed
• [Journal Article] A Peculiar Jet and Arc of Molecular Gas toward the Rich and Young Stellar Cluster Westerlund 2 and a TeV Gammma Ray Source (2009)
  • Author(s): Fukui, Y.(1番目), Kawamura, A.(11番目), 総著者数=15名
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol.61 Pages: 23-27
  • Peer Reviewed
• [Journal Article] Discovery of Molecular Loop 3 in the Galactic Center : Evidence for a Positive-Velocity Magnetically Floated Loop towards L=355°-359° (2009)
  • Author(s): Fujishita, M.(1番目), Torii, K.(2番目), Kawamura, A.(6番目), Machida, M.(10番目), Nozawa, S.(12番目), Matsumoto, R.(13番目), Fukui, Y.(14番目), 総著者数=14名
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol.61 Pages: 1039-1053
  • Peer Reviewed
• [Journal Article] Similarity between the Molecular Loops in the Galactic Center and the Solar Chromospheric Arch Filaments (2009)
  • Author(s): Takahashi, K., Nozawa, S., Matsumoto, R., Machida, M., Fukui, Y., Kudo, N., Torii, K., Yamamoto, H., Fujishita, M.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol.61 Pages: 957-969
  • Peer Reviewed
• [Journal Article] Fomation of Galactic Center Magnetic Loops (2009)
  • Author(s): Machida, M., Matsumoto, R., Nozawa, S., Takahashi, K., Fukui, Y., Kudo, N., Torii, K., Yamamoto, H., Fujishita, N., Tomisaka, K.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: Vol.61 Pages: 411-420
• [Presentation] 星間ガスの加熱・冷却を考慮した分子雲ループ形成シミュレーション (2011)
  • Author(s): 鈴木宏聡
  • Organizer: 日本天文学会2011年春季年会
  • Place of Presentation: 筑波大学
  • Year and Date: 2011-03-18
• [Presentation] Molecular loops in the Galactic Center (2010)
  • Author(s): Fukui, Y.
  • Organizer: Star formation under extreme conditions ; the Galactic center
  • Place of Presentation: Besancon Observatory
  • Year and Date: 2010-12-07
• [Presentation] 星間ガスの加熱・冷却を考慮したParker不安定性による分子雲ループ形成シミュレーション (2010)
  • Author(s): 鈴木宏聡
  • Organizer: 日本天文学会2010年秋季年会
  • Place of Presentation: 金沢大学
  • Year and Date: 2010-09-22
• [Presentation] Large molecular loops in the Galactic center ; Evidence for Parker instability (2010)
  • Author(s): Fukui, Y.
  • Organizer: The 5^<th> Zermatt ISM-Symposium Conditions and Impact of Star Formation ; New resuls with Herchel and beyond
  • Place of Presentation: Grand Hotel Zermatterhof
  • Year and Date: 2010-09-21
• [Presentation] 分子雲による粒子加速機構の追求:銀河系中心部とガンマ線 (2010)
  • Author(s): Fukui, Y.
  • Organizer: SNR GCOE研究会「粒子加速研究会」
  • Place of Presentation: 名古屋大学
  • Year and Date: 2010-06-18
• [Presentation] 「なんてん」による分子雲観測とFermiガンマ線源 (2010)
  • Author(s): Fukui, Y.
  • Organizer: 日本天文学会2010年春季年会
  • Place of Presentation: 広島大学
  • Year and Date: 2010-03-25
• [Presentation] Molecular clouds and SNRs (2010)
  • Author(s): Fukui, Y.
  • Organizer: Exploring Supernova Remnants and Pulsar Wind Nebulae in X-rays : before and after ASTRO-H
  • Place of Presentation: 宇宙科学研究所(相模原)
  • Year and Date: 2010-02-19
• [Presentation] Molecular loops in the Galactic center (2009)
  • Author(s): Fukui, Y.
  • Organizer: The Galactic Center : A Window to the Nuclear Environment of disk Galaxies
  • Place of Presentation: Shanghai
  • Year and Date: 20090819-23
• [Presentation] Molecular Loops in the Galactic Center : Detailed Observations of the Footpoint of the Loops (2009)
  • Author(s): Torii, K.
  • Organizer: The Galactic Center : A Window to the Nuclear Environment of disk Galaxies
  • Place of Presentation: Shanghai
  • Year and Date: 20090819-23
• [Presentation] Molecular Loops in the Galactic Center (2009)
  • Author(s): Kudo, N.
  • Organizer: The Physical Condition in the Whole Loops, The Galactic Center : A Window to the Nuclear Environment of disk Galaxies
  • Place of Presentation: Shanghai
  • Year and Date: 20090819-23
• [Presentation] Three-Dimensional Global MHD Simulations of the Magnetic Loop Structures in our Galactic Center (2009)
  • Author(s): Machida, M.
  • Organizer: The Galactic Center : A Window to the Nuclear Environment of disk Galaxies
  • Place of Presentation: Shanghai
  • Year and Date: 20090819-23
• [Presentation] 銀河系中心部磁気浮上ループ-CO高励起線を用いた詳細観測- (2009)
  • Author(s): 鳥居和史
  • Organizer: 日本天文学会2009年秋季年会
  • Place of Presentation: 山口大学
  • Year and Date: 2009-09-14
• [Presentation] 冷却を考慮した銀河ガス円盤の3次元磁気流体数値実験 (2009)
  • Author(s): 町田真美
  • Organizer: 日本天文学会2009年秋季年会
  • Place of Presentation: 山口大学
  • Year and Date: 2009-09-14
• [Presentation] Molecular gas and dust in high mass star forming regions (2009)
  • Author(s): Fukui, Y.
  • Organizer: Dust grains and gas : from the ISM to the Solar system
  • Place of Presentation: soul
  • Year and Date: 2009-07-10
• [Presentation] Correlation between high energy objects and molecular clouds in the Galaxy (2009)
  • Author(s): Fukui, Y.
  • Organizer: The Fnergetic Cosmos : from Suzaku to ASTRO-H
  • Place of Presentation: 小樽
  • Year and Date: 2009-07-01