The Dense Plasma Torus around the Nucleus of an Active Galaxy NGC1052

Kameno Seiji; Sawada-Satoh Satoko; Inoue Makoto; Shen Zhi-Qiang; Wajima Kiyoaki

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The Dense Plasma Torus around the Nucleus of an Active Galaxy NGC1052

机译：活跃银河系NGC1052核周围的密集等离子体圆环

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Asubparsec-scaledenseplasmatorusaroundanactivegalacticnucleusisunveiled.Wereportonvery-long-baselineinterferometry(VLBI)observationsat2.3,8.4,and15.4a€‰GHztowardstheactivegalaxyNGC1052.Theconvexspectraofthedouble-sidedjetsandthenucleusimplythatsynchrotronemissionisobscuredthroughfreea€“freeabsorption(FFA)bytheforegroundcolddenseplasma.AtrichromaticimagewasproducedtoillustratethedistributionoftheFFAopacity.Wefoundacentralcondensationoftheplasmawhichcoversabout0.1a€‰pcand0.7a€‰pcoftheapproachingandrecedingjets,respectively.Asimpleexplanationfortheasymmetricdistributionistheexistenceofathickplasmatorusperpendiculartothejets.WealsofoundanambientFFAabsorber,whosedensityprofilecanbeascribedtoasphericaldistributionoftheisothermalKingmodel.Thecoexistenceoftorus-likeandsphericaldistributionsoftheplasmasuggestsatransitionfromradialaccretiontorotationalaccretionaroundthenucleus.

机译：Asubparsec-scaledenseplasmatorusaroundanactivegalacticnucleusisunveiled.Wereportonvery-长baselineinterferometry（VLBI）observationsat2.3,8.4，and15.4a€‰GHztowardstheactivegalaxyNGC1052.Theconvexspectraofthedouble-sidedjetsandthenucleusimplythatsynchrotronemissionisobscuredthroughfreea€“freeabsorption（FFA）bytheforegroundcolddenseplasma.AtrichromaticimagewasproducedtoillustratethedistributionoftheFFAopacity.Wefoundacentralcondensationoftheplasmawhichcoversabout0.1a€‰pcand0.7a€‰pcoftheapproachingandrecedingjets，一个不对称分布的简单解释是存在垂直于喷射器的厚幅等离子体。

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《PASJ: Publications of the Astronomical Society of Japan》 |2001年第2期|共页
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Kameno Seiji; Sawada-Satoh Satoko; Inoue Makoto; Shen Zhi-Qiang; Wajima Kiyoaki;
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7. The Dense Plasma Torus around the Nucleus of an Active Galaxy NGC1052 [O] . Seiji Kameno, Satoko Sawada-Satoh, Makoto Inoue, 2001

机译：围绕活性星系NGC1052的核的致密等离子体圆环

The Dense Plasma Torus around the Nucleus of an Active Galaxy NGC1052

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