On the Origin of Two Modes of Star Formation : Isolated Formation vs. Clustered Formation

2009 Fiscal Year Final Research Report

• Project/Area Number: 20740113
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Astronomy
• Research Institution: National Astronomical Observatory of Japan
• Principal Investigator: FURUYA Ray, S. National Astronomical Observatory of Japan, ハワイ観測所, 研究員 (60455201)
• Research Collaborator: KITAMURA Yoshimi 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 准教授 (30183792) ; SHINNAGA Hiroko カリフォルニア工科大学, Caltechサブミリ波天文台(U.S.A.), Staff Scientist ; CESARONI Riccardo Istituto Nazionale di Astrofisica, Osservatorio Astrofisico di Arcetri (Italy), Astronomo associato
• Project Period (FY): 2008 – 2009
• Keywords: 分子雲コア / 重力収縮 / 環境条件 / 質量降着 / 原始星形成 / 回転トロイド / 分裂過程 / 星団形成

Research Abstract

We studied the origin of two modes of star formation : "isolated" vs. "clustered" ; the former mostly represents low-mass star formation and the latter high-mass. In this context, we searched for extremely young protostar(s) as well as cluster of such (proto)stars over a wide range of stellar masses, and investigated physical properties of their natal molecular gas, focusing on accretion onto central star(s).

Research Products

• [Journal Article] Infall, outflow, and rotation in the G19. 61-0. 23 hot molecular core (2010)
  • Author(s): Furuya, R.S., Cesaroni, R., Shinnaga, H.
  • Journal Title: Astronomy & Astrophysics
  • Peer Reviewed
• [Journal Article] VLBI study of maser kinematics in high-mass SFRs. II. G23. 01-0. 41 (2010)
  • Author(s): Sanna, A., Moscadelli, L., Cesaroni, R., Tarchi, A., Furuya, R.S., Goddi, C.
  • Journal Title: Astronomy & Astrophysics (印刷中)
  • Peer Reviewed
• [Journal Article] Class I and Class II methanol masers in high-mass star forming (2010)
  • Author(s): Fontani, F., Cesaroni, R., Furuya, R.S.
  • Journal Title: (印刷中)
• [Journal Article] VLBI study of maser kinematics in high-mass SFRs. I. G16. 59-0. 05 (2010)
  • Author(s): Sanna, A., Moscadelli, L., Cesaroni, R., Tarchi, A., Furuya, R.S., Goddi, C.
  • Journal Title: Astronomy & Astrophysics (印刷中)
  • Peer Reviewed
• [Journal Article] Looking for high-mass young stellar objects: H2O and OH masers in ammonia cores (2010)
  • Author(s): Codella, C., Cesaroni, R., Lopez-Sepulcre, A., Beltran, M.T., Furuya, R., Testi, L.
  • Journal Title: Astronomy & Astrophysics 510巻 Pages: A86-A102
  • Peer Reviewed
• [Journal Article] arm Extended Dense Gas at the Heart of a Cold Collapsing Dense Core (2009)
  • Author(s): Shinnaga, Hiroko, Phillips, Thomas G., Furuya, Ray S., Kitamura, Yoshimi
  • Journal Title: Astrophysical Journal Letters 706巻 Pages: L226-L229
  • Peer Reviewed
• [Journal Article] High-velocity Molecular Outflow in CO J = 7-6 Emission from the Orion Hot Core (2009)
  • Author(s): Furuya, Ray S., Shinnaga, Hiroko
  • Journal Title: Astrophysical Journal 703巻 Pages: 1198-1201
  • Peer Reviewed
• [Journal Article] Spectroscopic Evidence for Gas Infall in GF 9-2 (2009)
  • Author(s): Furuya, Ray S., Kitamura, Yoshimi, Shinnaga, Hiroko
  • Journal Title: Astrophysical Journal Letters 692 Pages: L96-L99
  • Peer Reviewed
• [Journal Article] Submillimeter Observations of the Isolated Massive Dense Clump IRAS 20126+4104 (2008)
  • Author(s): Shinnaga, Hiroko, Phillips, Thomas G., Furuya, Ray S., Cesaroni, Riccardo
  • Journal Title: Astrophysical Journal 682巻 Pages: 1103-1113
  • Peer Reviewed
• [Journal Article] Low-Mass Star-Forming Cores in the GF9 Filament (2008)
  • Author(s): Furuya, Ray S., Kitamura, Yoshimi, Shinnaga, Hiroko
  • Journal Title: Pub. of the Astronomical Society of Japan 60巻 Pages: 421-428
  • Peer Reviewed
• [Journal Article] 原始星(ファーストコア)誕生後数千年を捉えた! (2008)
  • Author(s): 古屋玲
  • Journal Title: 天文月報(日本天文学会) Pages: 727-740
• [Journal Article]
  • Journal Title: Astronomy & Astrophysics
  • Peer Reviewed