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A New Method to Estimate Cosmological Parameters Using the Baryon Fraction of Clusters of Galaxies

Published online by Cambridge University Press:  25 May 2016

Shin Sasaki
Shin Sasaki*
Affiliation:
Department of Physics Tokyo Metropolitan University

Extract

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We propose a new method to estimate cosmological parameters using the baryon fraction of clusters of galaxies for a range of redshifts. The basic assumption is that the baryon fraction of clusters is constant, which is a reasonable assumption when it is averaged within a Mpc scale. We find that the baryon fraction vs. redshift diagram can estimate the cosmological parameters, since the derived value of the baryon fraction from observations depends on the adopted value of cosmological parameters through the angular diameter distance (e.g. Sasaki, S. 1996, PASJ48. L119).

Type
IV. Structure Formation and Dark Matter
Information
Symposium - International Astronomical Union , Volume 183: Cosmological Parameters and the Evolution of the Universe , 1999 , pp. 264
Copyright
Copyright © Kluwer 1999