The X-ray/SZ view of the virial region. II. Gas mass fraction

@article{Eckert2013TheXV,
  title={The X-ray/SZ view of the virial region. II. Gas mass fraction},
  author={Dominique Eckert and Stefano Ettori and Silvano Molendi and Franco Vazza and St{\'e}phane Paltani},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  year={2013}
}
Several recent studies used the hot gas fraction of galaxy clusters as a standard ruler to constrain dark energy, which provides competitive results compared to other techniques. This method, however, relies on the assumption that the baryon fraction in clusters agrees with the cosmic value Omega_b/Omega_m, and does not differ from one system to another. We test this hypothesis by measuring the gas mass fraction over the entire cluster volume in a sample of local clusters. Combining the SZ… 

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