The Cluster Gas Mass Fraction as a Cosmological Probe : a Revised Study(Chapter 2. Thermal Structure/Dynamics of Groups and Clusters of Galaxies, The Extreme Universe in the Suzaku Era)

スポンサーリンク

概要

• 論文の詳細を見る

• We present the analysis of the baryonic content of 65 X-ray luminous galaxy clusters observed with Chandra in the redshift range 0.143-1.273. Our study aims at resolving the gas mass fraction in these objects to put constraints on the cosmological parameters Ω_m, Ω_Λ and the ratio between the pressure and density of the "dark" energy, w. By assuming that the galaxy clusters are representative of the cosmic baryon budget, the distribution of the cluster baryon fraction in the hottest (T_<gas>5keV) systems as function of redshift is used to constrain the cosmological parameters. We discuss how our constraints are affected from several systematics, namely the assumed baryon fraction in stars, the depletion parameter, the sample selection.

• 2007-12-19

著者

• Tozzi Paolo

  Inaf Osservatorio Astronomico

• TOZZI Paolo

  INAF, Osservatorio Astronomico di Trieste

• ETTORI Stefano

  INAF, Osservatorio Astronomico di Bologna

• BALESTRA Italo

  MPE

• MORANDI Andrea

  Universita di Bologna

• ETTORI Stefano

  INAF, Osservatorio Astronomico

• Tozzi Paolo

  INAF, Osservatorio Astronomico

関連論文

• The Cluster Gas Mass Fraction as a Cosmological Probe : a Revised Study(Chapter 2. Thermal Structure/Dynamics of Groups and Clusters of Galaxies, The Extreme Universe in the Suzaku Era)
• Evolution in the Iron Abundance of the ICM(Chapter 3. Chemical Structure and Evolution Clusters of Galaxy, The Extreme Universe in the Suzaku Era)

スポンサーリンク