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Spectral signature of cosmological infall of gas around the first quasars

机译:第一类星体周围的宇宙气体侵入的光谱特征

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摘要

Recent observations have shown that, only a billion years after the Big Bang, the Universe was already lit up by bright quasars fuelled by the infall of gas onto supermassive black holes. The masses of these early black holes are inferred from their luminosities to be >10~9 solar masses (solar mass), which is a difficult theoretical challenge to explain. Like nearby quasars, the early objects could have formed in the central cores of massive host galaxies. The formation of these hosts could be explained if, like local large galaxies, they were assembled gravitationally inside massive (>10~(12) solar mass) haloes of dark matter. There has hitherto been no observational evidence for the presence of these massive hosts or their surrounding haloes. Here we show that the cosmic gas surrounding each halo must respond to its strong gravitational pull, where absorption by the infalling hydrogen produces a distinct spectral signature. That signature can be seen in recent data.
机译:最近的观察表明,在大爆炸发生仅十亿年之后,宇宙就已经被明亮的类星体照亮了,这些类星体是由气体落入超大质量黑洞所推动的。这些黑洞的质量从其光度推断为> 10〜9太阳质量(太阳质量),这在理论上很难解释。像附近的类星体一样,早期的物体可能已经形成在巨大的宿主星系的中心核心中。如果这些寄主的形成像局部大型星系一样,是通过重力在暗物质的大块(> 10〜(12)太阳质量)晕圈中组装的,则可以解释。迄今为止,还没有观察到证据表明这些块状宿主或其周围的光环的存在。在这里,我们表明,每个光晕周围的宇宙气体必须响应其强大的引力,在此,落入的氢吸收产生明显的光谱特征。可以在最近的数据中看到该签名。

著录项

  • 来源
    《Nature》 |2003年第6921期|p.341-343|共3页
  • 作者

    Rennan Barkana; Abraham Loeb;

  • 作者单位

    School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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