Heartbeat of an active galaxy

Phil Uttley

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Heartbeat of an active galaxy

机译：活跃星系的心跳

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Active galaxies are thought to be the supermassive cousins of binary systems in our Galaxy that contain black holes. Observations of an unusual active galaxy provide compelling evidence that these systems are indeed related. "Black holes have no hair." This famous comment by John Wheeler encapsulates the idea that black holes are inherently simple objects, specified only by their mass, spin and electric charge. It also extends to their nearby environments. The superheated, X-ray-emitting gas that is pulled in, or 'accreted', from a black hole's surroundings is predicted to show the same behaviour whether it is torn from a normal star by a ten-solar-mass black-hole companion - a system known as an X-ray binary - or accreted from the innermost regions of an 'active' galaxy by a central, supermassive black hole (of 10~6-10~9 solar masses).

机译：活跃星系被认为是我们银河系中包含黑洞的双星系统的超大规模近亲。对异常活跃银河系的观察提供了令人信服的证据，证明这些系统确实是相关的。 “黑洞没有头发。”约翰·惠勒（John Wheeler）的这一著名评论概括了这样一种观念，即黑洞本质上是简单的对象，仅由其质量，自旋和电荷来指定。它还扩展到他们附近的环境。预测从黑洞周围被吸入或“积聚”的过热的X射线气体，无论是被质量为10太阳质量的黑洞伴星从正常恒星中撕裂，都表现出相同的行为。 -被称为X射线双星的系统-或由中央“超大质量黑洞”（太阳质量为10〜6-10〜9）从“活动”星系的最内层吸积。

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《Nature》 |2008年第7211期|p.294-295|共2页
作者
Phil Uttley;
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作者单位

Joseph Stokes Jr. Research Institute, The Children's Hospital of Philadelphia, 517 Abramson Research Center, Philadelphia, Pennsylvania 19104-4318, USA;

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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;
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4. Active Galaxies and Clusters of Galaxies [C] . Biman B. Nath Asian-Pacific Regional International Astronomical Union meeting . 2009

机译：活跃的星系和星系簇的簇
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机译：活跃星系的心跳

Heartbeat of an active galaxy

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