A candidate sub-parsec supermassive binary black hole system
A candidate sub-parsec supermassive binary black hole system
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DOI：
10.1038/nature07779
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发表时间：
2009-01
期刊：
影响因子：
64.8
通讯作者：
T. Boroson;T. Lauer
中科院分区：
文献类型：
--
作者：
T. Boroson;T. Lauer
The role of mergers in producing galaxies, together with the finding that most large galaxies harbour black holes in their nuclei, implies that binary supermassive black hole systems should be common. Here we report that the quasar SDSS J153636.22+044127.0 is a plausible example of such a system. This quasar shows two broad-line emission systems, separated in velocity by 3,500 km s-1. A third system of unresolved absorption lines has an intermediate velocity. These characteristics are unique among known quasars. We interpret this object as a binary system of two black holes, having masses of 107.3and 108.9solar masses separated by ∼0.1 parsec with an orbital period of ∼100 years.
