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Nearby Low-Mass Hypervelocity Stars

Published online by Cambridge University Press:  17 July 2015

Y.Q. Zhang ,
M.C. Smith  and
J.L. Carlin
Y.Q. Zhang*
Affiliation:
Shanghai Astronomical Observatory
M.C. Smith*
Affiliation:
Shanghai Astronomical Observatory
J.L. Carlin
Affiliation:
Rensselaer Polytechnic Institute, Troy & Earlham College, Richmond, USA
*
e-mail: zhangyq@shao.ac.cn
e-mail: msmith@shao.ac.cn
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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.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 68: The Milky Way Unravelled by Gaia: GREAT Science from the Gaia Data Releases , 2014 , pp. 255 - 259
Copyright
© EAS, EDP Sciences, 2015

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References

Bond, N.A., Ivezić, Ž., Sesar, B., et al., 2010, ApJ, 716, 29CrossRef
Bramich, D.M., Vidrih, S., Wyrzykowski, L., et al., 2008, MNRAS, 386, 887CrossRef
Brown, W.R., Geller, M.J., Kenyon, S.J., & Kurtz, M.J., 2005, ApJ, 622, L33CrossRef
Brown, W.R., Geller, M.J., & Kenyon, S.J., 2014, ApJ, 787, 89CrossRef
Gies, D.R., 1987, ApJS, 64, 545CrossRef
Hills, J.G., 1988, Nature, 331, 687CrossRef
Ivezić, Ž., Sesar, B., Jurić, M., et al., 2008, ApJ, 684, 287CrossRef
Kepler, S.O., Pelisoli, I., Koester, D., et al., 2015, MNRAS, 446, 4078CrossRef
Koposov, S.E., Belokurov, V., & Evans, N.W., 2013, ApJ, 766, 79CrossRef
Li, Y., Luo, A., Zhao, G., et al., 2012, ApJ, 744, L24CrossRef
Palladino, L.E., Schlesinger, K.J., Holley-Bockelmann, K., et al., 2014, ApJ, 780, 7CrossRef
Piff, T., Scannapieco, C., Binney, J., et al., 2014, A&A, 562, A91
Ramspeck, M., Heber, U., & Edelmann, H., 2001, A&A, 379, 235
Schlegel, D.J., Finkbeiner, D.P., Davis, M., 1998, ApJ, 500, 525CrossRef
Schönrich, R., 2012, MNRAS, 427, 274CrossRef
Sesar, B., Ivezić, Ž., Lupton, R.H., Jurić, M., et al., 2007, AJ, 134, 2236CrossRef
Smith, M.C., Evans, N.W., & An, J.H. 2009a, ApJ, 698, 1110CrossRef
Smith, M.C., Evans, N.W., Belokurov, V., et al., 2009b, MNRAS, 399, 1223CrossRef
Smith, M.C., Whiteoak, S.H., & Evans, N.W., 2012, ApJ, 746, 181CrossRef
Stone, R.C., 1991, AJ, 102, 333CrossRef
Vickers, J.J., Smith, M.C., & Grebel, E.K., 2015, AJ, submitted
Vidrih, S., Bramich, D.M., Hewett, P.C., et al., 2007, MNRAS, 382, 515CrossRef
Watkins, L.L., Evans, N.W., Belokurov, V., et al., 2009, MNRAS, 398, 1757CrossRef
Zheng, Z., Carlin, J.L, Beers, T.C., et al., 2014, ApJ, 785, L23CrossRef
Zhong, J., Li, C., Liu, C., et al., 2014, ApJ, 771, 118