1999 Fiscal Year Final Research Report Summary
Far-Infrared Spectroscopic Study of Interstellar Medium and Star-formation Rate in the Galactic Center
| Project/Area Number |
09440093
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | The Institute of Space and Astronautical Science |
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Principal Investigator |
NAKAGAWA Takao ISAS, Space Astrophysics, Professor, 宇宙圏研究系, 教授 (20202210)
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| Co-Investigator(Kenkyū-buntansha) |
KANEDA Hidehiro ISAS, Space Astrophysics, Research Fellow, 宇宙圏研究系, 教授 (30301724)
MURAKAMI Hiroshi ISAS, Space Astrophysics, Professor, 宇宙圏研究系, 教授 (40135299)
MATSUMOTO Toshio ISAS, Space Astrophysics, Professor, 宇宙圏研究系, 教授 (60022696)
KAWADA Mitsunobu Nagoya Univ. Department of Physics, Lecturer, 大学院・理学研究科, 講師 (50280558)
SHIBAI Hiroshi Nagoya Univ. Department of Physics, Professor, 大学院・理学研究科, 教授 (70154234)
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| Project Period (FY) |
1997 – 1999
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| Keywords | Galactic Center / Far-Infrared Spectroscopy / Far-Infrared [CII] line / balloon-borne telescope / Star-Formation Rate / Photo-dissociation Region / Inter Stellar Matter / Inter Stellar Radiation Field |
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| Research Abstract |
We made large-scale survey observations of the far-infrared [CII] spectral line from the Galactic plane, and found that the [CII] line is anomalously weak toward the Galactic center. We attribute this weakness to the soft interstellar radiation field in the Galactic center region. If it is the case, our observations suggest that the current star-formation rate in the Galactic center region is relatively low.
In order to check the above suggestion, we planned high spatial observations of the [CII] line emission from the Galactic center using the TIFR (TATA Institute of Fundamental Research, India) 1m balloon-borne telescope, and made the first observation with this system successfully during the campaign in 1999. We could not observe the Galactic center in this campaign, but we are now planning to observe the region on the basis of the experience gained during this campaign.
We also observed the Galactic center region with the space-borne telescope ISO (infrared Space Observatory). Although we could not observe the whole region, we could cover the whole far-infrared region spectroscopically, and this observation is complement with balloon-borne observations.
We also made theoretical calculations of far-infrared emission from photo-dissociation regions to interpret the above observations.
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[Publications] S. Arimura, H. Shibai, M. Kawada, A. Ito, M. Tanaka, T. Nakagawa, M.Narita, H. Kaneda, M. Tanaka, T. Tohya, S. Makiuti, Y. Okamura, Y. Doi, H. Okuda, T. N. Reagarajan: "New balloon-borne telescope for Far-Infrared astronomy"SPIE Proceedings. 4014(印刷中).
Description
「研究成果報告書概要(和文)」より
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[Publications] S.Arimura, H.Shibai, M.Kawada, A.Ito, M.Tanaka, T.Nakagawa, M.Narita, H.Kaneda, M.Tanaka, T.Tohya, S.Makiuti, Y.Okamura, Y.Doi, H.Okuda, T.N.Rengarajan: "New balloon-borne telescope for far-infrared astronomy"SPIE Proceedings. 4014(in press).
Description
「研究成果報告書概要(欧文)」より
