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Jet acceleration of the fast molecular outflows in the Seyfert galaxy IC 5063

机译：塞弗特星系IC 5063中快速分子流出的喷气加速

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摘要

Massive outflows driven by active galactic nuclei are widely recognized to have a key role in the evolution of galaxies, by heating the ambient gas, expelling it from the nuclear regions, and thereby affecting the star-formation histories of the galaxy bulges. It has been proposed that the powerful jets of relativistic particles (such as electrons) launched by some active nuclei can both accelerate and heat the molecular gas, which often dominates the mass budgets of the outflows. Clear evidence for this mechanism, in the form of detailed associations between the molecular gas kinematics and features in the radio-emitting jets, has however been lacking. Here we report that the warm molecular hydrogen gas in the western radio lobe of the Seyfert galaxy IC 5063 is moving at high velocities-up to about 600 kilometres per second-relative to the galaxy disk. This suggests that the molecules have been accelerated by fast shocks driven into the interstellar medium by the expanding radio jets. These results demonstrate the general feasibility of accelerating molecular outflows in fast shocks driven by active nuclei.
机译：人们广泛认为，由活跃的银河核驱动的大量流出通过加热环境气体，将其从核区域排出，从而影响星系凸起的恒星形成历史，从而在星系的演化中起关键作用。有人提出，由一些活跃的原子核发射的相对论粒子（例如电子）的强大射流可以加速和加热分子气体，而分子气体通常在流出物的总预算中占主导地位。然而，尚缺乏以分子气体运动学与放射射流中的特征之间的详细联系形式的这种机制的明确证据。在这里，我们报告说，塞弗特星系IC 5063的西部无线电波中的温暖分子氢气正以相对于星系盘每秒约600公里的高速度移动。这表明分子已经被不断扩大的射流驱动进入星际介质的快速冲击所加速。这些结果证明了在由活性核驱动的快速激波中加速分子流出的一般可行性。

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  • 来源
    《Nature》 |2014年第7510期|440-443|共4页
  • 作者

    C. Tadhunter; R. Morganti; M. Rose; J. B. R. Oonk; T. Oosterloo;

  • 作者单位

    Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK;

    ASTR0N, The Netherlands Institute of Radio Astronomy, PO Box 2,7990 AA, Dwingeloo The Netherlands,Kapteyn Astronomical Institute, University of Groningen, PO Box 800,9700 AV Groningen, The Netherlands;

    Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge Massachusetts 02138 USA;

    ASTR0N, The Netherlands Institute of Radio Astronomy, PO Box 2,7990 AA, Dwingeloo The Netherlands;

    ASTR0N, The Netherlands Institute of Radio Astronomy, PO Box 2,7990 AA, Dwingeloo The Netherlands,Kapteyn Astronomical Institute, University of Groningen, PO Box 800,9700 AV Groningen, The Netherlands;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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