Lessons from the curious case of the ‘fastest’ star in Gaia DR2

Gaia DR2 5932173855446728064 was recently proposed to be unbound from the Milky Way based on the −614.3 ± 2.5 km s−1 median radial velocity given in Gaia DR2. We obtained eight epochs of spectroscopic follow-up and find a very different median radial velocity of −56.5 ± 5.3 km s−1. If this differenc...

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Bibliographic Details
Main Authors: Boubert, D, Strader, J, Aguado, D, Seabroke, G, Koposov, SE, Sanders, JL, Swihart, S, Chomiuk, L, Evans, NW
Format: Journal article
Language:English
Published: Oxford University Press 2019