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- W2288036434 abstract "We study accretion rates during the gravitational wave-driven merger of a binary supermassive black hole embedded in an accretion disc, formed by gas driven to the centre of the galaxy. We use 3D simulations performed with phantom, a smoothed particle hydrodynamics code. Contrary to previous investigations, we show that there is evidence of a ‘squeezing phenomenon’, caused by the compression of the inner disc gas when the secondary black hole spirals towards the primary. This causes an increase in the accretion rates that always exceed the Eddington rate. We have studied the main features of the phenomenon for a mass ratio q = 10−3 between the black holes, including the effects of numerical resolution, the secondary accretion radius and the disc thickness. With our disc model with a low aspect ratio, we show that the mass expelled from the orbit of the secondary is negligible (<5 per cent of the initial disc mass), different to the findings of previous 2D simulations with thicker discs. The increase in the accretion rates in the last stages of the merger leads to an increase in luminosity, making it possible to detect an electromagnetic precursor of the gravitational wave signal emitted by the coalescence." @default.
- W2288036434 created "2016-06-24" @default.
- W2288036434 creator A5003341742 @default.
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- W2288036434 date "2016-01-27" @default.
- W2288036434 modified "2023-10-01" @default.
- W2288036434 title "Gas squeezing during the merger of a supermassive black hole binary" @default.
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- W2288036434 doi "https://doi.org/10.1093/mnras/stw034" @default.
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