Nearby Low-Mass Hypervelocity Stars. Issue 67 (17th July 2015)

• Record Type: Journal Article
• Authors: Zhang, Y.Q.; Smith, M.C.; Carlin, J.L.
• Editors: Walton, N.A.; Figueras, F.; Balaguer-Núñez, L.; Soubiran, C.
• Is Part Of: EAS publications series. Issue 67/68(2014)
• Page Start: 255
• Page End: 259
• Publication Date: 2015-07-17
• Subjects: Astronomy -- Periodicals; 520
• DOI: 10.1051/eas/1567046
• Languages: English
• ISSNs: 1633-4760

Abstract

Abstract : Hypervelocity stars are those that have speeds exceeding the escape speed and are hence unbound from the Milky Way. We investigate a sample of low-mass hypervelocity candidates obtained using data from the high-precision SDSS Stripe 82 catalogue, which we have combined with spectroscopy from the 200-inch Hale Telescope at Palomar Observatory. We find four good candidates, but without metallicities it is difficult to pin-down their distances and therefore total velocities. Our best candidate has a significant likelihood that it is escaping the Milky Way for a wide-range of metallicities.