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首页> 外文会议>Proceedings of the 32nd International Cosmic Ray Conference >Particle acceleration and the origin of gamma-ray emission from Fermi Bubbles
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Particle acceleration and the origin of gamma-ray emission from Fermi Bubbles

机译：费米气泡的粒子加速和伽马射线发射的起源

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摘要

Fermi LAT has discovered two extended gamma-ray bubbles above and below the galactic plane. We propose that their origin is due to the permanent energy release in the Galactic center (GC) as a result of star accretion onto the central black hole. Shocks generated by these processes propagate into the Galactic halo and accelerate particles there. We show that electrons accelerated up to u0018 10 TeV may be responsible for the observed gamma-ray emission of the bubbles as a result of inverse Compton (IC) scattering on the relic photons. We suggest that the Bubble could generate the flux of CR protons at energies > 1015 eV because the shocks in the Bubble have much larger length scales and longer lifetime in comparison with those in SNRs. This may explain the the CR spectrum above the knee.
机译：费米·拉特（Fermi LAT）在银河平面上方和下方发现了两个扩展的伽马射线气泡。我们认为它们的起源是由于恒星在中央黑洞上的积聚而在银河系中心（GC）中永久释放能量。这些过程产生的震动会传播到银河系光环中，并使那里的粒子加速。我们显示，电子加速到u 1018 TeV可能是由于气泡对康普（IC）的反向散射而导致所观察到的气泡的伽马射线发射的原因。我们建议气泡可以在能量> 1015 eV时产生CR质子通量，因为与SNR相比，气泡中的冲击具有更大的长度尺度和更长的寿命。这可以解释膝盖上方的CR频谱。

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  • 来源
  • 会议地点 Beijing(CN)
  • 作者

    D.O. CHERNYSHOV; K.-S. CHENG; V.A. DOGIEL; C.M. KO; W.-H. IP; Y. WANG;

  • 作者单位

    I.E.Tamm Theoretical Physics Division of Lebedev's Physical Institute, Leninskii pr. 53, 119991, Moscow, Russia Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China Institute of Astronomy, National Central University, Jhongli 320, Taiwan;

    Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China;

    I.E.Tamm Theoretical Physics Division of Lebedev's Physical Institute, Leninskii pr. 53, 119991, Moscow, Russia;

    Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China Institute of Astronomy, National Central University, Jhongli 320, Taiwan;

    Institute of Astronomy, National Central University, Jhongli 320, Taiwan;

    Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 宇宙射线强度变化;
  • 关键词

    Galaxy; halo-radiation mechanisms; non-thermal —acceleration of particles — shock waves;

    机译：星系;晕辐射机制；非热-粒子加速-冲击波;

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