The Baryon content of the Universe

  title={The Baryon content of the Universe},
  author={Massimo Persic and Paolo Salucci},
  journal={Monthly Notices of the Royal Astronomical Society},
  • M. Persic, P. Salucci
  • Published 1 September 1992
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We estimate the baryon mass density of the Universe due to the stars in galaxies and the hot gas in clusters and groups of galaxies. The galaxy contribution is computed by using the Efstathiou, Ellis & Peterson luminosity function, together with van der Marel and Persic & Salucci’s mass-to-light versus luminosity relationships. We find stars ≃ 0.002. For clusters and groups we use the Edge et al. X -ray luminosity function, and Edge & Stewart and Kriss, Cioffi & Canizares’ (gas mass… 

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