Evidence of Fanning in the Ophiuchus Stream

@article{Sesar2015EvidenceOF,
  title={Evidence of Fanning in the Ophiuchus Stream},
  author={B. Sesar and A. Price-Whelan and J. Cohen and H. Rix and S. Pearson and K. Johnston and E. Bernard and A. Ferguson and N. Martin and C. Slater and K. Chambers and H. Flewelling and R. Wainscoat and C. Waters},
  journal={The Astrophysical Journal},
  year={2015},
  volume={816}
}
  • B. Sesar, A. Price-Whelan, +11 authors C. Waters
  • Published 2015
  • Physics
  • The Astrophysical Journal
  • The Ophiuchus stellar stream presents a dynamical puzzle: its old stellar populations (~12 Gyr) cannot be reconciled with (1) its orbit in a simple model for the Milky Way potential and (2) its short angular extent, both of which imply that the observed stream formed within the last 230 km s^(−1)) against ~40 other stars: their velocities are comparable to those of the stream, but would be exceptional if they were unrelated halo stars. Their positions and velocities are, however, inconsistent… CONTINUE READING

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