Understanding of massive star formation based on wide-area mappin gsurvey of dense molecular gas toward galaxies in the local group

• Project/Area Number: 22540249
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: Joetsu University of Education
• Principal Investigator: TOSAKI Tomoka 上越教育大学, 大学院・学校教育研究科, 准教授 (40356126)
• Co-Investigator(Kenkyū-buntansha): SAKAI Takeshi 東京大学, 大学院・理学系研究科, 助教 (20469604) ; MURAOKA Kazuyuki 大阪府立大学, 大学院・理学系研究科, 助教 (40571287)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2012: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000); Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2010: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: 星形成 / 星間物質 / サブミリ波 / 超伝導受信機 / 局所銀河群

Research Abstract

We improved the 345 GHz receiver for ASTE 10m telescope, CATS345, using Orthomode transducer. We successfully obtained the wide area map of CO(3-2) in the spiral galaxy M33 in the local group. We find that most GMCs in M33 are associated with star formation activity. The lifetimes of GMCs were found to be 20-40 Myr.

Research Products

• [Journal Article] (2012)
  • Author(s): Miura, R.E., Kohno, K., Tosaki, T.他13名
  • Journal Title: The Astrophysical Journal Volume: 761巻 Pages: 23-23
  • Peer Reviewed
• [Journal Article] NRO M 33 All-Disk Survey of Giant Molecular Clouds (NRO MAGiC). (2012)
  • Author(s): Onodera, S., Kuno, N., Tosaki, T.他9名
  • Journal Title: II Dense Gas Formation, Publication of the Astronomical Society of Japan Volume: 64巻
  • Peer Reviewed
• [Journal Article] 13CO(J =1-0) On-the-Fly Mapping of the Giant H II Region NGC 604 (2012)
  • Author(s): Muraoka, K. Tosaki, T.他6名
  • Journal Title: Publication of the Astronomical Society of Japan Volume: 64巻
  • Peer Reviewed
• [Journal Article] NRO M 33 All-Disk Survey of Giant Molecular Clouds (NRO MAGiC). II Dense Gas Formation (2012)
  • Author(s): Onodera, S., Kuno, N., Tosaki, T. 他9名
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 64 Pages: 133-133
  • NAID: 10031146607
  • Peer Reviewed
• [Journal Article] Giant Molecular Cloud Evolutions in the Nearby Spiral Galaxy M33 (2012)
  • Author(s): Miura, R, E., Kohno, K., Tosaki, T., Espada, D., Hwang, N., Kuno, N., Okumura, S. K., Hirota, A., Muraoka, K., Onodera, S., et al.
  • Journal Title: The Astrophysical Journal Volume: 761 Issue: 1 Pages: 37-37
  • DOI: 10.1088/0004-637x/761/1/37
  • Peer Reviewed
• [Journal Article] ^<13>CO(J=1-0)On-the-Fly Mapping of the Giant H II Region NGC 604 : Variation in Molecular Gas Density and Temperature due to Sequential Star Formation (2012)
  • Author(s): Muraoka, K.Tosaki, T., 他6名
  • Journal Title: Publication of the Astronomical Society of Japan Volume: 64 Pages: 31-39
  • NAID: 10030385844
  • Peer Reviewed
• [Journal Article] NRO M33 All Disk Survey of Giant Molecular Clouds (NRO MAGiC) (2011)
  • Author(s): Tosaki, T.,他12名
  • Journal Title: I. HI to H2 Transition, Publication of the Astronomical Society of Japan Volume: 63巻 Pages: 1171-1179
  • Peer Reviewed
• [Journal Article] Temperature Variations of the Cold Dust in the Triangulum Galaxy M33 (2011)
  • Author(s): Komugi, S., Tosaki, T.,他20名
  • Journal Title: Publication of the Astronomical Society of Japan Volume: 63巻 Pages: 1139-1150
  • NAID: 10029861364
  • Peer Reviewed
• [Journal Article] Temperature Variations of the Cold Dust in the Triangulum Galaxy M33 (2011)
  • Author(s): Komugi, S., Tosaki, T., 他20名
  • Journal Title: Publication of the Astronomical Society of Japan Volume: 63 Pages: 1139-1150
  • NAID: 10029861364
  • Peer Reviewed
• [Journal Article] NRO M33 All Disk Survey of Giant Molecular Clouds (NRO MAGiC) : I. HI to H_2 Transition (2011)
  • Author(s): Tosaki, T., 他12名
  • Journal Title: Publication of the Astronomical Society of Japan Volume: 63 Pages: 1171-1179
  • NAID: 10030385212
  • Peer Reviewed
• [Journal Article] Breakdown of Kennicutt-Schmidt Law at Giant Molecular Cloud Scales in M33 (2010)
  • Author(s): Onodera, S.,Kuno, N., Tosaki, T.,他9名
  • Journal Title: The Astrophysical Journal Letters Volume: 722巻 Pages: 127-131
  • Peer Reviewed
• [Journal Article] NRO LegacyProject : Survey of Giant Molecular Cloudsin M33 (2010)
  • Author(s): Kuno, N., Tosaki, T.他11名
  • Journal Title: Highlights of Astronomy Volume: 15巻 Pages: 416-416
• [Journal Article] Aperture Synthesis Observations of CO, HCN, and 89 GHz Continuum Emission Toward NGC 604 in M33 (2010)
  • Author(s): Miura, R., Okumura, S.K. Tosaki, T.他7名
  • Journal Title: Sequential Star Formation Induced by a Supergiant HII Region,The Astrophysical Journal Volume: 724 Pages: 1120-1132
  • Peer Reviewed
• [Journal Article] Aperture Synthesis Observations of CO, HCN, and 89 GHz Continuum Emission Toward NGC 604 in M33 : Sequential Star Formation Induced by a Supergiant H II Region (2010)
  • Author(s): Miura, R., Okumura, S.K.Tosaki, T., 他7名
  • Journal Title: The Astrophysical Journal Volume: 724 Pages: 1120-1132
• [Journal Article] NRO Legacy Project : Survey of Giant Molecular Clouds in M33 (2010)
  • Author(s): Kuno, N., Tosaki, T., 他11名
  • Journal Title: Highlights of Astronomy Volume: 15 Pages: 416-416
• [Journal Article] Breakdown of Kennicutt-Schmidt Law at Giant Molecular Cloud Scales in M33 (2010)
  • Author(s): Onodera, S., Kuno, N., Tosaki, T., 他9名
  • Journal Title: The Astrophysical Journal Letters Volume: 722 Pages: 127-131
• [Presentation] NRO M33 All Disk Survey ofGiant Molecular Clouds (MAGiC) (2013)
  • Author(s): 濤崎智佳
  • Organizer: 日本文学会春季年会
  • Place of Presentation: 埼玉大学
• [Presentation] NRO M33 All Disk Survey of Giant Molecular Clouds (MAGiC) (2013)
  • Author(s): 濤﨑智佳
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 埼玉大学
• [Presentation] Molecular Gas and Star formation in Giant HII regions of M33, New Trends in Radio Astronomy in theALMA Era (2012)
  • Author(s): Tosaki, T
  • Organizer: The 30th Anniversary ofNobeyama Radio Observatory
  • Place of Presentation: Hakone, Japan
• [Presentation] Molecular Gas and Star formation in Giant HII regions of M33 (2012)
  • Author(s): Tosaki, T.
  • Organizer: New Trends in Radio Astronomy in the ALMA Era: The 30th Anniversary of Nobeyama Radio Observatory
  • Place of Presentation: ザ・プリンス箱根（神奈川県箱根町）
• [Presentation] NRO legacy project : M33 all disk survey of Giant Molecular Clouds (GMCs) with NRO-45m and ASTE-10mtelescopes (2010)
  • Author(s): Tosaki, T
  • Organizer: The 5th Zermatt ISM Symposium "Conditions and impact of star formation : New results with Herschel and beyond"
  • Place of Presentation: Zermatt, Switzerland
  • Year and Date: 2010-09-21
• [Presentation] NRO legacy project : M33 all disk survey of Giant Molecular Clouds (GMCs) with NRO-45m and ASTE-10m telescopes (2010)
  • Author(s): 濤崎智佳
  • Organizer: The 5th Zermatt ISM Symposium "Conditions and impact of star formation : □□New results with Herschel and beyond"
  • Place of Presentation: Zermatt, Switzerland
  • Year and Date: 2010-09-21
• [Remarks]
  • URL: http://www.juen.ac.jp/lab/tosaki/m33data/
• [Remarks]
  • URL: http://www.juen.ac.jp/lab/tosaki/m33/
• [Remarks] NRO M33 All Disk Survey of Giant Molecular Clouds
  • URL: http://www.juen.ac.jp/lab/tosaki/m33data/
• [Remarks]
  • URL: http://www.juen.ac.jp/lab/tosaki/m33/index.html