Interferometric Astrometry of Proxima Centauri and Barnard's Star Using HUBBLE SPACE TELESCOPE Fine Guidance Sensor 3: Detection Limits for Substellar Companions*

@article{Benedict1999InterferometricAO,
  title={Interferometric Astrometry of Proxima Centauri and Barnard's Star Using HUBBLE SPACE TELESCOPE Fine Guidance Sensor 3: Detection Limits for Substellar Companions*},
  author={G. Benedict and B. Mcarthur and D. Chappell and E. Nelan and W. Jefferys and W. V. Altena and J.Lee and D. Cornell and P. Shelus and P. Hemenway and O. Franz and L. Wasserman and R. L. Duncombe and D. Story and A. Whipple and L.W.Fredrick},
  journal={The Astronomical Journal},
  year={1999},
  volume={118},
  pages={1086-1100}
}
We report on a substellar-companion search utilizing interferometric fringe-tracking astrometry acquired with Fine Guidance Sensor 3 on the Hubble Space Telescope. Our targets were Proxima Centauri and Barnard's star. We obtain absolute parallax values of πabs = 07687 ± 00003 for Proxima Cen and πabs = 05454 ± 00003 for Barnard's star. Once low-amplitude instrumental systematic errors are identified and removed, our companion detection sensitivity is less than or equal to one Jupiter mass for… Expand
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