• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Molecular abundance and distribution of the active galaxy with imaging line survey observations

Research Project

Project/Area Number 15K05031
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Astronomy
Research InstitutionNihon University

Principal Investigator

Takano Shuro  日本大学, 工学部, 教授 (00222084)

Co-Investigator(Kenkyū-buntansha) 中島 拓  名古屋大学, 宇宙地球環境研究所, 助教 (90570359)
Research Collaborator KOHNO Kotaro  
Project Period (FY) 2015-10-21 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords銀河 / 活動的銀河中心核 / 爆発的星形成 / セイファート銀河 / 電波天文学 / 電波干渉計 / アルマ(ALMA)望遠鏡 / 星間分子 / 星間化学 / アルマ / ALMA / ラインサーベイ / 電波 / NGC 1068 / ブラックホール / 分子組成 / アルマ望遠鏡
Outline of Final Research Achievements

About 200 molecular species have been detected in interstellar space. So far "line survey observations" have been carried out to observe molecular lines in unbiased way along the frequency axis. This is a powerful method to study physical and chemical conditions of interstellar matter. Here we applied this method to the galaxy NGC 1068 with the ALMA telescope to study the galaxy with an active galactic nucleus (AGN).
As a result, we found molecules with enhanced intensity (HCN etc.) in the gas around the AGN (CND), by comparing gas in the CND and in regions where many high-mass stars are formed. These results suggest that the CND is affected by X-ray radiation from the AGN, and/or that the CND is in high-temperature owing to shock wave.

Academic Significance and Societal Importance of the Research Achievements

本研究では、銀河でしばしばみられるAGNを取り巻くガス領域(CND)と、重い星が多数形成しているガス領域について、それらを網羅的に、かつ空間的に完全に分解し、区別して観測した。その結果、両者の分子組成には、異なる面があることを示した。AGNは一般にダストに深く埋もれ、観測が難しい。今回、分子組成を調べることにより、AGNの存在を電波観測で調べる手がかりを得た。このことは、銀河の性質や進化の研究、また、銀河での星間物質の組成や反応の研究に役立つ。
以上のことを通して、宇宙を構成する重要な要素である銀河の理解が進み、社会的にも関心が高い宇宙やその進化の研究に、微力ながら寄与していると考える。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (17 results)

All 2018 2017 Other

All Int'l Joint Research (7 results) Presentation (10 results) (of which Int'l Joint Research: 5 results)

  • [Int'l Joint Research] Univ. of Virginia(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Academia Sinica Institute of Astronomy(その他の国・地域 台湾)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Univerisity of Virginia(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Institute of Astronomy and Astrophysics(台湾)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] University of Virginia(米国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Institute of Astronomy and Astrophysics(台湾)

    • Related Report
      2015 Research-status Report
  • [Int'l Joint Research] University of Virginia(米国)

    • Related Report
      2015 Research-status Report
  • [Presentation] Investigation of molecular abundance toward the circumnuclear disk in Seyfert 2 Galaxy NGC 1068 with the IRAM 30-m, NRO 45-m, and ALMA2018

    • Author(s)
      T. Nakajima, S. Takano, K. Kohno
    • Organizer
      NOEMA/30m Workshop
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The Molecular Abundance of the Circumnuclear Disk Surrounding an Active Galactic Nucleus in the Seyfert 2 Galaxy NGC 10682018

    • Author(s)
      T. Nakajima, S. Takano, T. Tosaki, K. Kohno, N. Harada, E. Herbst, Y. Tamura, T. Izumi, and A. Taniguchi
    • Organizer
      Workshop on interstellar matter 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Molecular abundances in nearby galaxies2018

    • Author(s)
      S. Takano
    • Organizer
      化学系学協会東北大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] The Molecular Abundance of the Circumnuclear Disk Surrounding an Active Galactic Nucleus in the Seyfert 2 Galaxy NGC 10682018

    • Author(s)
      T. Nakajima, S. Takano, T. Tosaki, K. Kohno, N. Harada, E. Herbst, Y. Tamura, T. Izumi, A. Taniguchi
    • Organizer
      East Asian ALMA Science Workshop 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 野辺山 45 m 望遠鏡による近傍銀河核のラインサーベイ観測I. データ2018

    • Author(s)
      高野秀路, 中島拓,河野孝太郎
    • Organizer
      日本天文学会2018年春季年会
    • Related Report
      2017 Research-status Report
  • [Presentation] 野辺山 45 m 望遠鏡による近傍銀河核のラインサーベイ観測II. 解析2018

    • Author(s)
      中島拓,高野秀路,河野孝太郎,原田ななせ,Eric Herbst
    • Organizer
      日本天文学会2018年春季年会
    • Related Report
      2017 Research-status Report
  • [Presentation] 野辺山 45-m 鏡と ALMA による近傍 銀河に対するラインサーベイ観測2017

    • Author(s)
      中島拓、高野秀路、河野孝太郎、田村陽一、泉拓磨、谷口暁星、安藤亮、濤崎智佳、原田ななせ、Eric Herbst
    • Organizer
      日本天文学会 春季年会
    • Place of Presentation
      九州大学(福岡県福岡市)
    • Year and Date
      2017-03-15
    • Related Report
      2016 Research-status Report
  • [Presentation] Molecular Abundance of the Circumnuclear Disk in Seyfert 2 Galaxy NGC 10682017

    • Author(s)
      T. Nakajima, S. Takano, K. Kohno, N. Harada, and E. Herbst
    • Organizer
      Symposium "Evolution of Molecules in Space"
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] NRO Legacy project: Molecular Line Survey toward External Galaxies2017

    • Author(s)
      中島 拓、高野 秀路、河野 孝太郎、原田ななせ、Herbst, Eric
    • Organizer
      NRO45m/ASTE Single Dish Science Workshop 2017
    • Related Report
      2017 Research-status Report
  • [Presentation] A Complete Imaging Line Survey Observation in the 3-mm Band toward NGC 10682017

    • Author(s)
      T. Nakajima, S. Takano, K. Kohno, N. Harada, and E. Herbst
    • Organizer
      ALMA/45m/ASTE Users Meeting 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2015-10-21   Modified: 2022-08-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi