ASTRONOMY A black hole changes its feeding habits

Editorial Material

关键词: ACTIVE GALACTIC NUCLEI;    REFERENCE SURVEY CARS;    LOOK QUASARS;    SEYFERT 1;    VARIABILITY;    SHADOWS;    SEARCH;    SDSS;   

DOI  :  10.1038/nature20480

来源: SCIE

【 摘 要 】

In the 1980s, the gas surrounding a black hole in a nearby galaxy began to emit much more radiation than before. This change has unexpectedly reversed in the past five years, questioning our understanding of these extreme phenomena.

【 授权许可】

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