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The methods for searching hypervelocity star candidates from the SDSS

Published online by Cambridge University Press:  06 January 2014

Yinbi Li ,
Ali Luo ,
Gang Zhao  and
Youjun Lu
Yinbi Li
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, 100012, Beijing, China email: ybli@bao.ac.cn
Ali Luo
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, 100012, Beijing, China email: ybli@bao.ac.cn
Gang Zhao
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, 100012, Beijing, China email: ybli@bao.ac.cn
Youjun Lu
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, 100012, Beijing, China email: ybli@bao.ac.cn
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Abstract

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Hyper-velocity stars are believed to be ejected out from the Galactic center through dynamical interactions of (binary) stars with the central massive black hole(s). In this paper, we firstly select F and G type main sequence stars from about 370,000 stellar spectra of DR7. Then, we select 369 high velocity stars from main sequence samples using the radial velocity distribution. Finally, we find 13 possible unbound hyper-velocity star candidates from the 369 high velocity stars.

Keywords

Hyper-velocity starsSDSSOrigin
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S298: Setting the scene for Gaia and LAMOST , May 2013 , pp. 421
Copyright
Copyright © International Astronomical Union 2014 

References

Ivezić, Ž., Sesar, Branimir, Jurić, Mario, et al. 2008, ApJ, 684, 287CrossRefGoogle Scholar