Cosmological Constraints From the Intracluster Gas Fraction
نویسندگان
چکیده
منابع مشابه
Constraints on Scalar - Field Dark Energy from Galaxy Cluster Gas Mass Fraction versus Redshift
We use the Allen et al. (2004) Chandra measurements of x-ray gas mass fraction of 26 rich clusters to place constraints on the scalar-field dark energy model with inverse power law potential energy density. The constraints are consistent with, and typically more constraining than, those from other cosmological tests, and mildly favor the Einstein cosmological constant limit of the dark energy m...
متن کاملConstraints on Scalar - Field Dark Energy from Galaxy Cluster Gas Mass Fraction versus Redshift Data
We use the Allen et al. (2004) Chandra measurements of x-ray gas mass fraction of 26 rich clusters to place constraints on the scalar-field dark energy model with inverse power law potential energy density. The constraints are consistent with, and typically more constraining than, those from other cosmological tests, and mildly favor the Einstein cosmological constant limit of the dark energy m...
متن کاملEffect of Helium Sedimentation on X-ray Measurements of Galaxy Clusters
The uniformity of the helium-to-hydrogen abundance ratio in X-ray emitting intracluster medium (ICM) is one of the commonly adopted assumptions in X-ray analyses of galaxy clusters and cosmological constraints derived from these measurements. In this work, we investigate the effect of He sedimentation on X-ray measurements of galaxy clusters in order to assess this assumption and associated sys...
متن کاملProbing the Evolution of Gas Mass Fraction with Sunyaev-zel’dovich Effect
Study of the primary anisotropies of the Cosmic Microwave Background (CMB) can be used to determine the cosmological parameters to a very high precision. The power spectrum of the secondary CMB anisotropies due to the thermal Sunyaev-Zel’dovich Effect (SZE) by clusters of galaxies, can then be studied, to constrain more cluster specific properties (like gas mass). We show the SZE power spectrum...
متن کاملSupernova Ia and Galaxy Cluster Gas Mass Fraction Constraints on Dark Energy
We use the Riess et al. (2004) supernova Ia apparent magnitude versus redshift data and the Allen et al. (2004) galaxy cluster gas mass fraction versus redshift data to constrain dark energy models. These data provide complementary constraints that when combined together significantly restrict model parameters and favor slowly-evolving dark energy density models, close to the Einstein cosmologi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007