Exploring the timescale for high-mass star formation through deuterium fractionation ratios
Project/Area Number |
23740146
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Astronomy
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Research Institution | The University of Tokyo |
Principal Investigator |
SAKAI Takeshi 東京大学, 大学院・理学系研究科, 特任助教 (20469604)
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Project Period (FY) |
2011 – 2012
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Project Status |
Completed (Fiscal Year 2012)
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Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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Keywords | 電波天文 / 分子雲 / 星形成 / 大質量星 / 重水素 / 星間分子 / ミリ波 / 天文学 / 受信機 / 重水素濃縮 |
Research Abstract |
We have investigated the timescale of high-mass starless core phase from the deuterium fractionation rations in massive clumps. We have observed the HNC and HN13C lines toward the massive clumps, including infrared dark clouds (IRDCs) and high-mass protostellar objects (HMPOs), with the Nobeyama Radio Observatory 45 m telescope. We have found that the DNC/HNC ratio of the massive clumps is lower than that of the low-mass cores. This suggests that the timescale of high-mass starless phase is shorter than that of low-mass starless phase. By comparing with the model calculations, we have found that the timescale of high-mass starless phase is shorter than several times 104 yr.
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Report
(3 results)
Research Products
(12 results)
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[Journal Article] DNC/HNC Ratio of Massive Clumps in Early Evolutionary Stages of High-mass Star Formation2012
Author(s)
Sakai, T., Sakai, N., Furuya, K., Aikawa, Y., Hirota, T., Yamamoto, S.
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Journal Title
The Astrophysical Journal
Volume: Volume 747
Pages: 140-140
Related Report
Peer Reviewed
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[Journal Article] DNC/HNC Ratio of Massive Clumps in Early Evolutionary Stages of High-Mass Star Formation2012
Author(s)
Sakai, T., Sakai, N., Furuya, K., Aikawa, Y., Hirota, T., & Yamamoto, S.
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Journal Title
The Astrophysical Journal
Volume: 747
Issue: 2
Pages: 140-149
DOI
Related Report
Peer Reviewed
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[Presentation] Chemical Compositions of Massive Clumps in Early Evolutionary Stages of High-Mass Star Formation2012
Author(s)
Sakai, T., Sakai, N., Furuya, K., Aikawa, Y., Hirota, T., Yamamoto, S.
Organizer
New Trends in Radio Astronomy in the ALMA Era
Place of Presentation
Hakone, Japan
Related Report
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[Presentation] Deuterium Fractionation in Massive Clumps in Early Evolutionary Stages of High- Mass Star Formation2011
Author(s)
Sakai, T., Sakai, N., Furuya, K., Aikawa, Y., Hirota, T., Yamamoto, S.
Organizer
The Molecular Universe
Place of Presentation
Toledo, Spain
Related Report
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