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1997 Fiscal Year Final Research Report Summary

Cosmological Observations with A Multi-Beam Receiver at mm-Wave

Research Project

Project/Area Number 07404006
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionIbaraki University

Principal Investigator

TSUBOI Masato  Ibaraki Uiversity, Faculty of Science, Associate Professor, 理学部, 助教授 (10202186)

Co-Investigator(Kenkyū-buntansha) NOGUCHI Takashi  Nobeyama Radio Observatory, Associate Professor, 電波天文学研究系, 助教授 (90237826)
Project Period (FY) 1995 – 1997
KeywordsHubble constant / cosmological observation / receiver at mm-wave
Research Abstract

We developed a tunerless Q-band SIS mixer. The mixer is operating in the frequency range from 40 to 50 GHz with mixer bias voltage and LO power tunings. The frequency range of the mixer is available from 1 to 7 GHz. We also developed a 2*3 beam multi-feed SIS receiver for the Nobey ama 45-m telescope, in which the mixers are installed. The receiver system is designed as a sophisticated tool for the continuum mapping observation of Sunyaev-Zel'dovich effect toward clusters of galaxies. The receiver noise temperature is below 20-30 K and the instantaneous bandwidth is 700 MHz when the IF frequency is 1.5 GHz. The receiver system was located on the focal plane platform of the 45-m telescope in April 1997. In addition, the mixer was installed in the 40 GHz band VLBI receiver for the kashima 34-m telescope.
We performed a millimeter-wave pbservation of the Sunyaev-Zel'dovich effect toward a moderately distant cD cluster of galaxies, Abell, 2218, at 36 GHz using the Nobeyama 45-m telescope and a single-beam receiver. The antenna temperature decrement of the cosmic microwave background radiation (CMB) was measured be DELTAT<@D2A@>D2<@D1*@>D1 =-0.52(]SY.+-。[)0.15 mK at the central peak position of X-ray emission in the cluster. Assuming that the hot gas in the cluster has isothemality, spherical symmetry, and the beta-model density distribution, the Sunyaev-Zel'dovich effect is enferred to be DELTAT<@D2ORJ@>D2 =0.68(]SY.+-。[)0.19 mK at the Ray leigh-Jeans limit. A combination of this Sunyaev-Zel'dovich effect and X-ray surface brightness suggests that the Hubble constant is H<@D2O@>D2(q=0.5)=54<@D1+51@>D1<@D2-21@>D2kmS<@D1-1@>D1 MpS<@D1-1@>D1.
We have started the project of S-Z effect observetion with the 2*3 beam multi-feed SIS receiver and the Nobeyama 45-m telescope. Our scientific goal is reliable measurment of of S-Z effect toward many clusters. We had already observed a cluster in March 1998.
However, the weather condition was poor.

  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] M, Tsuboi: "Measurment of the Sunyaev-Zeldovich Effect toward Abell2218 at 36GHz" Publications of the Astronomical Society of Japan. 50. 169-173 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M, Tsuboi: "An Expanding Shell-like Molecular Cloudnear the Galadic Center Arc" Astrophysical Journal. 481. 263-266 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M, Tsuboi: "Sunyaev-Zeldoich Effect Observation Project with the Nobeyama 45-m teleway" Proceedings of IAU188. (in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T, Noguchi: "Twin Janction SIS Mixer with an Inductance made of a Coplaner Strip" IEEE Trans Appl Supercond. 7. 2570-2573 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T, Noguchi: "Twin Janction SIS Mixers for the 230GHz band" Applied Supercondnctivity. 158. 381-384 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tsuboi, M., Miyazaki, A., Kasuga, T.Matuso, H., and Kubo, N.: ""Measurment of the Sunyaev-Zel'dovich Effect toward Abell 2218 at 36 GHz"" PASJ. Vol.50(1). 169-173 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuboi, M., Miyazaki, A., Kasuga, T., Sakamoto, A., and Noguchi, T.: ""40-50 GHz Array Receiver with Tunerless SIS Mixers"" TWAA'96. 99-103 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuboi, M., Kawabata, T., Kasuga, T., and Kato, T.: ""Galactic Center Arc-Polarized Plumes Complex at 43 GHz"" PASJ. Vol.47(6). 829-836 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuboi, M., Ukita, N., and Handa, T.: ""An Expanding Shell-like Molecular Cloud near the Galactic Center Arc"" APJ. Vol.481. 263-266 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuboi, M., Ohta, E., Kasuga, T., Murata, Y., and Handa, T.: ""Highly Polarized ^<28>SiO Maser Emission in J=1-0, v=0 from Orion-KL IR_C"" APJ,Lett.Vol.461. 107-110 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuboi, M., Ukita, N., and Handa, T.: ""Dence Molecular Clouds in the Galactic Center Region"" APJ,Suppl.(submitted). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sunada, K., Noguchi, T.Tsuboi, M.and Inatani, J.: ""A Focal Plane Array Receiver for the NRO 45-m Telescope"" ASP Conf.Vol.75. 230-237 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuboi, M., Ohno T., Miyasaki, A., Kasuga, T., Sakamoto, A,and Noguchi, T.: ""Sunyaev-Zel'dovich Effect Observation Project with the Nobeyama 45-m Telescope"" IAU188, Kluwer A.P. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Noguch, H.Iwashita, and S.-C.Shi: ""Twin-Junction SIS Mixer with an Inductance made of a Coplanar Stripline"" IEEE Trans.Appl.Supercond.Vol.7. 2570-2573 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Noguchi, S.-C.Shi and H.Iwashita: ""Twin-junction SIS mixers for the 230 GHz band"" Inst.Phys.Conf.Ser. No.158. 381-384 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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