Cosmological Parameters from the Comparison of the 2MASS Gravity Field with Peculiar Velocity Surveys

  title={Cosmological Parameters from the Comparison of the 2MASS Gravity Field with Peculiar Velocity Surveys},
  author={Robert Pike and Michael J Hudson},
  journal={The Astrophysical Journal},
We compare the peculiar velocity field within 65 h-1 Mpc predicted from 2MASS photometry and public redshift data to three independent peculiar velocity surveys based on Type Ia supernovae, surface brightness fluctuations in elliptical galaxies, and Tully-Fisher distances to spiral galaxies. The three peculiar velocity samples are each in good agreement with the predicted velocities and produce consistent results for βK = Ω/bK. Taken together, the best-fit βK = 0.49 ± 0.04. We explore the… Expand

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