The space motion of leo I: Hubble space telescope proper motion and implied orbit

@article{Sohn2013TheSM,
  title={The space motion of leo I: Hubble space telescope proper motion and implied orbit},
  author={S. Sohn and G. Besla and R. Marel and M. Boylan-Kolchin and S. Majewski and James S. Bullock STScI and C. University and UC Irvine and U. Virginia},
  journal={The Astrophysical Journal},
  year={2013},
  volume={768},
  pages={139}
}
  • S. Sohn, G. Besla, +6 authors U. Virginia
  • Published 2013
  • Physics
  • The Astrophysical Journal
  • We present the first absolute proper motion measurement of Leo I, based on two epochs of Hubble Space Telescope ACS/WFC images separated by {approx}5 years in time. The average shift of Leo I stars with respect to {approx}100 background galaxies implies a proper motion of ({mu}{sub W}, {mu}{sub N}) = (0.1140 {+-} 0.0295, -0.1256 {+-} 0.0293) mas yr{sup -1}. The implied Galactocentric velocity vector, corrected for the reflex motion of the Sun, has radial and tangential components V{sub rad… CONTINUE READING
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