| Project/Area Number |
05640302
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Astronomy
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| Research Institution | Utsunomiya University |
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Principal Investigator |
TABARA Hiroto Utsunomiya Univ.Faculty of Education, Professor, 教育学部, 教授 (50012878)
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| Co-Investigator(Kenkyū-buntansha) |
KATOU Tatuzi Utsunomiya Univ.Faculty of International Studies, Asociate Professor, 国際学部, 助教授 (30152721)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1994: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1993: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Polarization / Faraday rotation / radio jets / Quasars / Galaxies / interstellar gas / 電波ジェト / 吸収線 / クエーサー / 電波銀河 / 銀河団 / 星形成 / 銀河磁場 |
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| Research Abstract |
1.Multi-channel polarimetry has been performed to detect high rotation measure of 35 sources out of 96 radio source candidates. We found that there exist sources with RM of several thousands rad m^<-2>. Houever, We can not confirm a large rotation measure coused by high densities in CSS sources and in the culster of galaxies.
2.Faraday rotations of the QSO's with strong absorption lines within the QSO itself are significantly higher than that of the QSO whose strong lines originated in the intervening gaseous halo of galaxies. The large rotation measure caused by high density gas and the magnetic field running parallel with the major axis of the radio sources.
3.The observations of the polarization at 43 GHz show that the Galactic center arc region is highly polarized up to 50% and that the magnetic field are well ordered along the vertical filament. The large internal Faraday rotation (3000radm^<-2>) explaines the depolarization properties in the Galactic arc.
4.We have observed the flux density and linear polarization at 3 cm for 93 core-dominated radio sources. Among them, 18 sources were classified as blazars and the remaining 67 sources are considered non-blazars. We conclude that the blazar and non-blazar sources form distinct classes ; that is, not all the core-dominated radio sources are blazars.
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