Study of gas motion and molecular abundance in the central region of external galaxies using the absorption lines of ammonia

2009 Fiscal Year Final Research Report

• Project/Area Number: 19540243
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: National Astronomical Observatory of Japan
• Principal Investigator: TAKANO Shuro National Astronomical Observatory of Japan, 野辺山宇宙電波観測所, 助教 (00222084)
• Co-Investigator(Kenkyū-buntansha): NAKANISHI Koichiro 国立天文台, 電波研究部, 助教 (60399277) ; NAKAI Naomasa 筑波大学, 数理物質科学研究科, 教授 (80192665) ; TAKANO Toshiaki 千葉大学, 工学研究科, 准教授 (40183058)
• Project Period (FY): 2007 – 2009
• Keywords: 電波観測 / 銀河 / アンモニア

Research Abstract

It is important to study gas motion in the central region of galaxies to understand the possible existence and environment around the central black hole. We selected absorption lines of ammonia for this purpose. In Arp 220 known as an active galaxy we analyzed obtained data. During data acquisition and analysis we considered to increase the reliability of the line width of the absorption lines. The (J,K)=(3,3) line was analyzed in detail, and as a result the full width was derived to be about 600km/s. This value is usual in galaxies, and we concluded that there is no significant violent motion in gas detectable with ammonia in the central region in Arp 220

Research Products

• [Presentation] ラインサーベイチーム、野辺山45m望遠鏡レガシープロジェクト:ラインサーベイ観測(II) (2010)
  • Author(s): 高野秀路, 坂井南美, 山本智, 河野孝太郎, 呂聖元, 他
  • Organizer: 日本天文学会
  • Place of Presentation: 山口大学
  • Year and Date: 2010-09-16
• [Presentation] Nobeyama 45 m Telescope Legacy Projects: Line Survey (2009)
  • Author(s): Takano, S. Aikawa, Y., Chen, V., Hirano, N., Hirota, T., Kamegai, K., Kobayashi, K., Kohno, K., Kuan, Y. -J., Liu, S. -Y., Ohashi, N., Ohishi, M., Ozeki, H., Sakai, N., Sakai, T., Shiba, S., Su, Y. -N., Sugimura, M., Takahashi, S., Takakuwa, S., Umemoto, T., Wang, K. -S., Yamada, M., Yamamoto, S., Zhang, Q. -Z.
  • Organizer: Workshop for Interstellar Matter 2008
  • Place of Presentation: 北海道大学
  • Year and Date: 2009-09-04
• [Presentation] Nobeyama 45m Legacy Project: Line Survey (2009)
  • Author(s): 高野秀路
  • Organizer: The 10th Asian-Pacific Regional IAU Meeting
  • Place of Presentation: Kunming, China
  • Year and Date: 2009-08-05
• [Presentation] ラインサーベイチーム、野辺山45m望遠鏡レガシープロジェクト:ラインサーベイ観測 (2009)
  • Author(s): 高野秀路, 酒井剛, 坂井南美, 山本智, 河野孝太郎, S. -Y. Liu, 他
  • Organizer: 日本天文学会
  • Place of Presentation: 東京
  • Year and Date: 2009-03-24
• [Presentation] Recent astrochemical studies with Nobeyama 45 m telescope and line survey projects from this winter (2008)
  • Author(s): 高野秀路
  • Organizer: 日本分光学会年次講演会
  • Place of Presentation: 東京工業大学(大岡山)
  • Year and Date: 2008-11-14