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A stream of hypervelocity stars from the Galactic Center
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A stream of hypervelocity stars from the Galactic Center
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Recent observations have found a 1700 km/s star [S5-HVS1] that was ejected from the Galactic Center approximately five million years ago. This star was likely produced by tidal disruption of a binary. In particular, the Galactic Center contains a few million year old stellar disk that could excite binaries to nearly radial orbits via a secular gravitational instability. Such binaries would be disrupted by the central supermassive black hole, and would also explain the observed cluster of B stars ~0.01 pc from the Galactic Center. In this paper we predict S5-HVS1 is part of a larger stream, and use observationally motivated N-body simulations to predict its spatial and velocity distribution.
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Cited by 1 Pith paper
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Binary disruptions driven by massive disks around massive black holes
Disk torques can drive stellar binaries around a massive black hole to tidal disruption, and the Milky Way's young stellar disk likely caused ~10^2 such events ~5 Myr ago.
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