期刊
NATURE
卷 455, 期 7211, 页码 369-371出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nature07277
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资金
- Polish MNiSW [NN203065933]
- PPARC senior fellowship
- Science and Technology Facilities Council [ST/F002963/1] Funding Source: researchfish
- STFC [ST/F002963/1] Funding Source: UKRI
Active galactic nuclei and quasars are thought to be scaled- up versions of Galactic black hole binaries, powered by accretion onto supermassive black holes with masses of 10(6)-10(9) M., as opposed to the similar to 10 M. in binaries (here M. is the solar mass). One example of the similarities between these two types of systems is the characteristic rapid X- ray variability seen from the accretion flow(1). The power spectrum of this variability in black hole binaries consists of a broad noise with multiple quasi- periodic oscillations superimposed on it. Although the broad noise component has been observed in many active galactic nuclei(2,3), there have hitherto been no significant detections of quasi- periodic oscillations(4-6). Here we report the discovery of an similar to 1- hour X- ray periodicity in a bright active galaxy, RE J1034+396. The signal is highly statistically significant ( at the 5.6 sigma level) and very coherent, with quality factorQ > 16. The X- ray modulation arises from the direct vicinity of the black hole.
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