Formulation of gas-star balance in galaxies

• Project/Area Number: 25800114
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: Kogakuin University (2014-2015); National Astronomical Observatory of Japan (2013)
• Principal Investigator: Komugi Shinya 工学院大学, 公私立大学の部局等, 准教授 (90548934)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 星形成 / 電波観測 / 国際研究者交流 / 分野横断 / 多波長天文学

Outline of Final Research Achievements

Star formation in galaxies proceed in and around discrete molecular clouds. It has not been known what physical parameters are responsible for triggering and driving star formation. This study aims at parameterizing physical quantities related to star formation, and finding the "equations" which rule the procession of star formation, via a multi-variable analysis. We obtained multi-wavelength datasets for ~100 molecular clouds in nearby galaxies, each with information on the star formation rate, stellar mass, dust density, low-density molecular gas mass, high-density molecular gas mass, and the age of the molecular clouds. Using these six parameters and applying a principal component analysis, we reduce the 6 quantities into two sets of relations each with six variables. These comprise two fundamental "planes", which express the bounding relations that molecular clouds must fulfill.

Research Products

• [Journal Article] Ground-based Pa α Narrow-band Imaging of Local Luminous Infrared Galaxies. I. Star Formation Rates and Surface Densities (2015)
  • Author(s): 舘内謙、小西真広、本原顕太郎, 他33人
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 217 Issue: 1 Pages: 1-26
  • DOI: 10.1088/0067-0049/217/1/1
  • Peer Reviewed / Open Access
• [Journal Article] The Pa-alpha Luminosity Function of HII Regions in Nearby Galaxies from HST/NICMOS (2013)
  • Author(s): L., Guilin, C., Daniela, R.C., Kennicutt Jr., E., Schinnerer, Y., Sofue, S., Komugi, F., Egusa, N.Z. Scoville
  • Journal Title: The Astrophysical Journal Letters Volume: 772 Issue: 1 Pages: 27-27
  • DOI: 10.1088/0004-637x/772/1/27
  • Peer Reviewed
• [Journal Article] The Schmidt-Kennicutt Law of Matched-Age Star Forming Regions (2013)
  • Author(s): Komugi, S., et al.
  • Journal Title: Proceedings of the International Astronomical Union Volume: 292 Issue: S292 Pages: 331-331
  • DOI: 10.1017/s1743921313001579
• [Journal Article] Fundamental Planes of the Interstellar Medium (2013)
  • Author(s): S., Komugi, R., Miura, S., Onodera, N., Kuno, T., Tosaki, NRO MAGIC Team
  • Journal Title: Astronomical Society of the Pacific Conference Series Volume: 476 Pages: 57-57
• [Journal Article] NRO M33 All-Disk Survey of Giant Molecular Clouds (NRO MAGiC): Properties of Giant Molecular Clouds in M33 (2013)
  • Author(s): S., Onodera, N., Kuno, T., Tosaki, K., Muraoka, R., Miura, K., Kohno, K., Nakanishi, T., Sawada, S., Komugi, H., Kaneko, A., Hirota
  • Journal Title: Astronomical Society of the Pacific Conference Series Volume: 476 Pages: 303-303
• [Presentation] Molecular Gas Excitation and Chemistry in Nearby LIRGs with ALMA (2015)
  • Author(s): Saito, Toshiki; Iono, Daisuke; Ueda, Junko; Nakanishi, Kouichiro; Imanishi, Masatoshi; Hagiwara, Yoshiaki; Yun, Min S.; Kaneko, Hiroyuki; Komugi, Shinya; Espada, Daniel; Sugai, Hajime; Motohara, Kentaro; Lee, Minju; Kawabe, Ryohei; Yamashita, Takuji
  • Organizer: IAU General Assembly, Meeting #29, id.2254284
  • Place of Presentation: Honolulu, Hawaii, USA
  • Year and Date: 2015-08-03
  • Int'l Joint Research
• [Presentation] The Nobeyama 45 m 12CO(J=1-0) Survey of local Luminous Infrared Galaxies (2015)
  • Author(s): Yamashita, Takuji; Komugi, Shinya; Matsuhara, Hideo; Armus, Lee; Inami, Hanae; Ueda, Junko; Iono, Daisuke; Kohno, Kotaro; Stierwalt, Sabrina; Arimatsu, Ko; Evans, Aaron
  • Organizer: IAU General Assembly, Meeting #29, id.2256489
  • Place of Presentation: Honolulu, Hawaii, USA
  • Year and Date: 2015-08-03
  • Int'l Joint Research
• [Presentation] Confirmation of the ISM Fundamental Plane (2014)
  • Author(s): Shinya Komugi
  • Organizer: ALMA high-z nearby galaxy workshop
  • Place of Presentation: 国立天文台三鷹
  • Year and Date: 2014-10-20 – 2014-10-21
• [Presentation] Development of the Multi-Parameter Star Formation Law (2014)
  • Author(s): Shinya Komugi
  • Organizer: 日本天文学会2014年度秋季年会
  • Place of Presentation: 山形大学
  • Year and Date: 2014-09-11
• [Presentation] MOPRAによるNGC300の広域サーベイ (2014)
  • Author(s): 小麥真也
  • Organizer: 国立天文台野辺山ユーザーズミーティング
  • Place of Presentation: 国立天文台野辺山宇宙電波観測所
  • Year and Date: 2014-07-22
• [Presentation] Fundamental Relations of the ISM and Star Formation at Giant Molecular Cloud Scales (2014)
  • Author(s): Shinya Komugi
  • Organizer: East Asia ALMA Workshop
  • Place of Presentation: 韓国、チェジュ島
  • Year and Date: 2014-06-15
• [Presentation] GEISHA プロジェクト：SWIMSとALMAでつなぐ系内外の星形成の統計研究 (2013)
  • Author(s): S., Komugi
  • Organizer: SWIMS Science Workshop
  • Place of Presentation: 東京大学理学系研究科天文学研究教育センター（東京都）
  • Invited
• [Remarks] 工学院大学・宇宙物理学研究室ホームページ
  • URL: http://www.ns.kogakuin.ac.jp/~wwa1061/
• [Funded Workshop] ALMA Workshop for Large Proposals on Nearby Galaxies (2015)
  • Place of Presentation: 国立天文台三鷹キャンパス
  • Year and Date: 2015-08-25