• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical journal >THE BLAZAR MAIN SEQUENCE
【24h】

THE BLAZAR MAIN SEQUENCE

机译：BLAZAR主序列

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We propose a sequence (the blazar main sequence: BMS) that links the two main components of the blazar class, namely, flat-spectrum radio quasars (FSRQs) and BL Lac objects, and yields all their distinctive features in a correlated way. In this view, both types of sources are centered on a supermassive Kerr hole close to maximal spin and observed pole-on. However, the FSRQs are energized by accretion at rates m ～1-10, and are dominated by disk components (thermal and electrodynamic jetlike components) that provide outputs in excess of L ～10~(46) ergs s~(-1). On the other hand, accretion levels m 1 are enough to energize BL Lac objects; here the radiation is highly nonthermal, and the power is partly provided by the rotational energy of the central Kerr hole, with the latter and the disk together sustaining a typical L ～10~(44) ergs s~(-1) for several gigayears. If so, we expect the BL Lac objects to show quite different evolutionary signatures from the FSRQs, and in particular, number counts close to the Euclidean shape, or flatter if the sources make a transition to a BL Lac from an FSRQ mode. In addition, for lower m along the BMS, we expect the large-scale electric fields to be less screened out and to accelerate fewer particles to higher energies radiating at higher frequencies; so in moving from FSRQs to BL Lac objects, these nonthermal radiations will peak at frequencies inversely correlated with the disk output. For the BL Lac objects, such a dependence implies increased scatter when one tries a correlation with the total output. At its endpoint, the BMS suggests widespread objects that are radiatively silent but still efficient in accelerating cosmic rays to ultrahigh energies.
机译：我们提出了一个序列（blazar主序列：BMS），该序列将blazar类的两个主要组成部分联系在一起，即平谱无线电类星体（FSRQ）和BL Lac对象，并以相关的方式产生了它们的所有独特特征。在此视图中，两种类型的源都集中在一个超大质量的Kerr孔上，该孔接近最大自旋并观察到极化。但是，FSRQs会以m〜1-10的速率增生，并以磁盘组件（热和电动喷气类组件）为主导，这些组件提供的输出超过L〜10〜（46）ers s〜（-1）。另一方面，吸积水平m 1足以激发BL Lac对象。这里的辐射是高度非热的，功率部分由中心Kerr孔的旋转能量提供，中心Kerr孔和磁盘共同维持典型的L〜10〜（44）ergs s〜（-1）数千兆年。 。如果是这样，我们希望BL Lac对象显示出与FSRQ完全不同的进化特征，尤其是计数接近欧几里得形状，或者如果源从FSRQ模式过渡到BL Lac则更平坦。另外，对于沿BMS的较低m，我们希望可以减少对大型电场的屏蔽，并可以将较少的粒子加速为以较高频率辐射的较高能量。因此，从FSRQ移到BL Lac对象时，这些非热辐射的峰值将与磁盘输出成反比。对于BL Lac对象，当人们尝试与总输出相关时，这种依赖性意味着分散性增加。在其终点，BMS提出了广泛的物体，这些物体辐射无声，但在加速宇宙射线到超高能量方面仍然有效。

著录项

  • 来源
    《The Astrophysical journal》 |2002年第1期|p.226-233|共8页
  • 作者

    A. CAVALIERE; V. DELIA;

  • 作者单位

    Astrofisica, Dipartimento di Fisica, Univerista degli Studi di Roma Tor Vergata, Via Ricerca Scientifica 1, Rome I-00133, Italy;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 天文学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号