HD 140283: A Star in the Solar Neighborhood that Formed Shortly after the Big Bang

  title={HD 140283: A Star in the Solar Neighborhood that Formed Shortly after the Big Bang},
  author={H. Bond and E. Nelan and D. A. Vandenberg and G. Schaefer and Dianne Harmer Pennsylvania State University and S. Institute and U. Victoria and Chara Array and G. S. University and Noao},
  journal={The Astrophysical Journal},
  • H. Bond, E. Nelan, +7 authors Noao
  • Published 2013
  • Physics
  • The Astrophysical Journal
  • HD 140283 is an extremely metal-deficient and high-velocity subgiant in the solar neighborhood, having a location in the Hertzsprung-Russell diagram where absolute magnitude is most sensitive to stellar age. Because it is bright, nearby, unreddened, and has a well-determined chemical composition, this star avoids most of the issues involved in age determinations for globular clusters. Using the Fine Guidance Sensors on the Hubble Space Telescope, we have measured a trigonometric parallax of 17… CONTINUE READING

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