A stream of hypervelocity stars from the Galactic Center. (arXiv:2005.10267v1 [astro-ph.GA])

A stream of hypervelocity stars from the Galactic Center. (arXiv:2005.10267v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Generozov_A/0/1/0/all/0/1">Aleksey Generozov</a>

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 young (few million years 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 letter, we predict S5-HVS1 is part of a larger stream, and use
observationally motivated N-body simulations to predict its spatial and
velocity distribution.

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 young (few million years 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 letter, 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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