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A Study of Highly Excited Interstellar Molecules.

Research Project

Project/Area Number 63490011
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 広領域
Research InstitutionUniversity of Toyama

Principal Investigator

AKABANE Kenji  Toyoma Univ. Dept. Sci., Prof., 理学部, 教授 (00012790)

Co-Investigator(Kenkyū-buntansha) 海部 宣男  国立天文台, 電波天文研究系, 教授 (50011630)
MATUSHIMA Fusakazu  Toyama Univ. Dept. Sci., Assist. Prof., 理学部, 助教授 (40142236)
TUNEKAWA Shozo  Toyama Univ. Dept. Sci., Assist. Prof., 理学部, 助教授 (40018982)
TAKAGI Kojiro  Toyama Univ. Dept. Sci., Prof., 理学部, 教授 (60018976)
OHISHI Masatoshi  National Astron. Obs., Res. Assist. (00183757)
Project Period (FY) 1988 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 1990: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1989: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1988: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsInterstellar matter / Molecular spectroscopy / Microwave spectroscopy / Laser spectroscopy / Infrared spectra / 星間物質(分子,ダスト) / 分子分光学 / マイクロウェーブ分光学 / レーザ分光学
Research Abstract

1. Laboratory microwave Spectroscopy of molecules in the ground and excited torsional states. (S. Tsunekawa and K. Akabane) Laboratory microwave specyra have been studied for the methanole, methyl-mercaptan, and methylamine molecules, which have been detected in interstellar clouds. These three molecules are characterized by the large amplitude torsional motions of their methyl groups. The spectra in their ground and excited torsional states have been studied. Furthermore, the microwave spectrum of CH_3OH in the V_<co>=1 state has been studied. The assigned transitions are a-type R branch transitions, J<3 in the A and E-species. For the E-species, several bーtype R or P branch transitions and the Q-branch transitions with K=0 <- -1, and K=1 <-0 have been assigned.
2. (2A) Laser Stark Spectroscopy with a Wide Stark Tuning Range. (K. Takagi and F. Matsushima) A laser Stark spectroscopy with a tuning range up to 30kv/mm has been developed by using a Stark cell with a plate spacing of 0.1mm. … More The wide range tunability has been demonstrated by observing lines of the CH_3F and D_2O in the excited vibrational levels. This spectrometer has been successfully used to carry out Dopplar-free spectroscopy. (2B) Diode Laser Spectroscopy in the near Infrared Region. (K. Takagi and F. Matsushima) Diode lasers in the near infrared region are used to observe band transitions of the HI molecule. The quadrupole coupling constants in the v=3, and 6 vibrational states have been determined.
3. A study of interstellar molecules by radio telescops (M. Ohishi and N. Kaifu) 1) ^<29>Si O maser line, in addition to normal ^<28>Si O line, was observed in the circumstellar envelope of red giants. 2) PS radical was examined in the laboratory and was tried to be detected in the interstellar space, but only an upper limit of the brightness was given. 3) CH_2CN radical was detected in TMC-1 with reference to the laboratory cooperative work by S. Saito et al.. 4) Detection of HC_2CHO (Propynal) in the cold cloud of TMC-1. Abundance of HC_2CHO in interstellar space is almost the same as that of C_3O. 5) Detection of C_4Si in interstellar space. An existence of new species of carbon-chain linear molecules as C _n S _i was proposed. 6) HCOOH (Formic acid) was detected in the cold dark cloud of L134N. 7) Detection of the v _t =2 transitions of CH@<D23@>D2OH in massive star forming regions. Excition temperature for _t =2 level was estimated to be as high as 500 to 700 K.
4. Detection of Cocoon-Nebulae (Stars) (K. Akabane) HII free-free spectra were observed within the NGC7538-IRSI as an extremely compact mm-wave source. The source may consist of several cocoon nebulae surrounding O-B stars which were predicted by Davidson and Harwit (1967). Less

Report

(4 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • 1988 Annual Research Report
  • Research Products

    (41 results)

All Other

All Publications (41 results)

  • [Publications] Shozo Tsunekawa,: "Microwave Spectrum of CH_3SD" J.Mol.Spectrosc.134. 63-71 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Nobuaki Ohhashi: "Microwave Spectrum of Methyl Amine: Assignment and Analysis of First Torsional State" J.Mol.Spectrosc.137. 33-46 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Hashinami: "Laser Stark Spectrscopy with a Wide Stark Tuning Range" J.Mol.Spectrosc.132. 1-12 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] F.Tawa: "Laser Stark Spectroscopy with a Wide Stark Tuning Range" J.Mol.Spectrosc.145. 192-193 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M.Ohishi,: ""Detection of A New Circumstellar Carbon Chain Molecule,C_4Si"" Astrophys.J.(Letters),. 345. L83-L86 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Akabane,K.: "“Continuum Observations of M17, W49A, and W51A"" Publ.Astron.Soc.Japan. 41. 809-822 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 赤羽 賢司,海部 宣男、田原 博人:"『宇宙電波天文学』" 共立出版株式会社、, 396 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 高木 光司郎:田隅 三生編: ""レ-ザ-シュタルク分光" 実験化学講座 6,分光I" (丸善,), 32 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tunekawa, S., Taniguch. I., Tambo. A., Nagai, T., Kojima, T., and Nakagawa, K.: "Microwave Spectrum of CH_3SD" J. Mol. Spectrosc.134,. 63-71, (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Ohashi, N., Tunekawa, S., Takagi, K., and Haugen, J.: "Microwave Spectrum of Methyl Amine : Assignment and analysis of the First torsional State" J. Mol. Spectrosc.137,. 33-46, (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Hashinami, S., Mito, H., Matsushima, F., and takagi, K.: "Laser Stark Spectroscopy with a wide Stark Tuning Range" J. Mol. Spectrosc.132. 1-12 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tawa, F., Morimoto, K., Nagasaki, H., Matsushima, F., and Takagi, K.: "Laser Stark Spectroscopy with a wide Stark Tuning Range" J. Mol. Spectrosc.145,. 192-199 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Ohshi, N., Tkagi, K., Hougen, T., Olson, W. B., and lafferty, W. J.: "Far-Infrared spectrum of methyl amine ----Assignment and Analysis of the First Torsional State" J. Mol. Spectrosc.132,. 242, (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Matsushima, F., Kakihata, S., Takahgi, K.: "Quadrupole Hyperfine Structure of V=3 <-0, 6<-0 overtone Band Spectral Lines of HI Observed with Near Infrared Diode Lasers" J. Chem. Phys.(94,)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Ohishi, M., Yamaoto, S., Saito, S., Suzuki, Hi., Kaifu. N., Ishikawa, S., Takano, S., Tsuji, T., and Unno, W.: "The Laboratory Spectrum of the PS Radical and Related Astronomical Search" Astrophys. J.329,. 511, (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Ohishi, M., Kaifu, N., Kawaguchi, K., Murakami, A., Saito, S., Yamamoto, S., Ishikawa, S., Fujita, Y., Shiratori, Y., and Irvine, W. M.: "Detection of A new Circumstellar Carbon chain Molecule, C_4Si" Astrophys. J. (Letters). 345,. L83-L86 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Irvine, W, M., Brown, R. D., Cragg, D. M., Friberg, P., Godfrey, P. D., Kafu, N., Mattews, H. E, Ohishi, M., Suzuki, H., and Takeo, H.: "A New Interstellar Polyatomic Molecule : Detection of Propynal in the Cold Cloud TMC-1" Astrophys. J. (Letters). 335,. L89 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Akabane, K., Sofue, Y., Hirabayashi, H., Morimoto. M., Inoue, M., and Downes, D.: "Continuum Observation of Sagittarius B2 at 23 and 43 GHz" Publ. Astron. Soc. Japan. 40,. 459-474, (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Akabane, K., Sofue, Y., Hirabayashi, H., and Inoue, M: "Continuum Observations of M17, W49A, and W51A" Publ. Astron. Soc. Japan. 41,. 809-822, (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Akabane, K., Inoue, M., Kawabe, R., Ohashi, N., Kameya, O., Ishiguro, M., and Sofue, Y.: "Radio Continuum around NGC7538-IRSI" Proceedings of the 5th Asian-Pacific Regional Meeting (IAU). (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Shozo Tsunekawa,: "Microwave Spectrum of CH_3SD" J.Mol.Spectrosc.134,. 63-71 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] Nobuaki Ohhashi: "Microwave Spectrum of Methyl Amine:Assignment and Analysis of the First Torsional State" J.Mol.Spectrosc.137,. 33-46 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Hashinami: "Laser Stark Spectroscopy with a Wide Stark Tuning Range" J.Mol.Spectrosc.132. 1-12 (1988)

    • Related Report
      1990 Annual Research Report
  • [Publications] F.Tawa: "Laser Stark Spectroscopy with a Wide Stark Tuning Range" J.Mol.Spectrosc.145. 192-199 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] M.Ohishi,: "“Detection of A New Circumstellar Carbon Chain Molecule,C_4Si"" Astrophys.J.(Letters),. 345. L83-L86 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] Akabane,K.: "“Continuum Observations of M17,W49A,and W51A"" Publ.Astron.Soc.Japan. 41. 809-822 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] 赤羽 賢司、海部 宣男、田原 博人: "宇宙電波天文学" 共立出版株式会社, 396 (1988)

    • Related Report
      1990 Annual Research Report
  • [Publications] 高木 光司郎:田隅 三生編: ""レ-ザ-シュタルク分光"実験化学講座6,分光I" 丸善, 32 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Akabane,K.et al.: "Continuum Observation of M17,W49A,and W51A at 43 GHz" Publ.Astron.Soc.Japan. 41. 809-820 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Akabane,K.et al.: "Radio Continuum Around the NGC7538-IRSI" Publ.Astron.Soc.Japan.

    • Related Report
      1989 Annual Research Report
  • [Publications] Tsunekawa,S.et al: "Microwave Spectrum of CH_3SD" Journal Molecular Spectroscopy. 134. 63-71 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Ohishi,M.et al.: "Detection of a New Circumstellar Carbon-Chain Molecule" Astrophys.J.(Letters). 345. 83 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Ohishi,M.(Yamamoto,S.et al.): "Laboratory Microwave Spectroscopy of the Linear C_3H and C_3D Radicals and Related Astronomical Observation" Astrophys.J.348. 363 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Kaifu,N.(Saito,S.et al): "The Microwave Spectrum of the CP Radical and Its Astronomical Search" Astrophys.J.341. 1114 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Akabane,K.;et al: Publ.Astron.Soc.Japan. 40. 459-474 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Hashinami,S.;et al: J.Mol.Spectrosc.132. 1-5 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Tsunekawa,S.;et al: Journal Molecular Spectroscopy(in press). (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] Ohishi,M.;et al: Astrophys.Journal. 329. 151-155 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Ohishi,M.;et al: Astrophys.Journal(Letters). 335. L89-L93 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Kaifu,N.;et al: Astrophys.Journal(Letters). 334. L113-L116 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 赤羽賢司 共著: "宇宙電波天文学" 共立出版, 0-396 (1988)

    • Related Report
      1988 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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