The local density of matter mapped by hipparcos

@article{Holmberg2000TheLD,
  title={The local density of matter mapped by hipparcos},
  author={J. Holmberg and C. Flynn},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2000},
  volume={313},
  pages={209-216}
}
  • J. Holmberg, C. Flynn
  • Published 2000
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • We determine the velocity distribution and space density of a volume-complete sample of A and F stars, using parallaxes and proper motions from the Hipparcos satellite. We use these data to solve for the gravitational potential vertically in the local Galactic disc, by comparing the Hipparcos measured space density with predictions from various disc models. We derive an estimate of the local dynamical mass density of 0.102±0.010 pc−3, which may be compared with an estimate of 0.095 M⊙ pc−3 in… CONTINUE READING

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