As far as I can tell the big deal is they are completely sure it came from Str A*.
It is also moving too fast to be easily explainable, but for now I would bet on this simply being a very extreme event. The set of hyper velocity stars is rather small at the moment, something like ~20 in total, so I don't think there is any reason to believe we have an unbiased sample.
Amusingly they do use it to measure the position of the _sun_!
It is also moving too fast to be easily explainable, but for now I would bet on this simply being a very extreme event. The set of hyper velocity stars is rather small at the moment, something like ~20 in total, so I don't think there is any reason to believe we have an unbiased sample.
Amusingly they do use it to measure the position of the _sun_!
Preprint at: https://arxiv.org/abs/1907.11725