An elevation of 0.1 light-seconds for the optical jet base in an accreting Galactic black hole system
An elevation of 0.1 light-seconds for the optical jet base in an accreting Galactic black hole system
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吸积银河系黑洞系统中光学喷流基座的高度为 0.1 光秒
DOI:
10.1038/s41550-017-0273-3
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发表时间:
2017
期刊:
影响因子:
14.1
通讯作者:
Gandhi P
中科院分区:
文献类型:
--
作者:
Gandhi P
Relativistic plasma jets are observed in many systems that host accreting black holes. According to theory, coiled magnetic fields close to the black hole accelerate and collimate the plasma, leading to a jet being launched, –. Isolating emission from this acceleration and collimation zone is key to measuring its size and understanding jet formation physics. But this is challenging because emission from the jet base cannot easily be disentangled from other accreting components. Here, we show that rapid optical flux variations from an accreting Galactic black-hole binary are delayed with respect to X-rays radiated from close to the black hole by about 0.1 seconds, and that this delayed signal appears together with a brightening radio jet. The origin of these subsecond optical variations has hitherto been controversial, , , –. Not only does our work strongly support a jet origin for the optical variations but it also sets a characteristic elevation of ≲103Schwarzschild radii for the main inner optical emission zone above the black hole, constraining both internal shock and magnetohydrodynamic models. Similarities with blazars,suggest that jet structure and launching physics could potentially be unified under mass-invariant models. Two of the best-studied jetted black-hole binaries show very similar optical lags,,, so this size scale may be a defining feature of such systems.
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DOI:
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发表时间:
2000
期刊:
影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
2017
期刊:
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DOI:
10.1088/0004-637x/787/2/151
发表时间:
2014
期刊:
The Astrophysical Journal
影响因子:
--
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