Hubble Space Telescope Trigonometric Parallax of Polaris B, Companion of the Nearest Cepheid

@article{Bond2017HubbleST,
  title={Hubble Space Telescope Trigonometric Parallax of Polaris B, Companion of the Nearest Cepheid},
  author={H. Bond and E. Nelan and N. Evans and G. Schaefer and Dianne Harmer Penn State and Stsci and C. F. Astrophysics and Char{\'a} and Noao},
  journal={arXiv: Solar and Stellar Astrophysics},
  year={2017}
}
Polaris, the nearest and brightest Cepheid, is a potential anchor point for the Leavitt period-luminosity relation. However, its distance is a matter of contention, with recent advocacy for a parallax of ~10 mas, in contrast with the Hipparcos measurement of 7.54+/-0.11 mas. We report an independent trigonometric parallax determination, using the Fine Guidance Sensors (FGS) on the Hubble Space Telescope. Polaris itself is too bright for FGS, so we measured its 8th-magnitude companion Polaris B… Expand
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