On the Number Density of Sunyaev-Zeldovich Clusters of Galaxies | Zendy

C. HernándezMonteagudo | Zendy; F. AtrioBarandela | Zendy; J. P. Mücket | Zendy

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On the Number Density of Sunyaev-Zeldovich Clusters of Galaxies

Author(s) -

C. HernándezMonteagudo,

F. AtrioBarandela,

J. P. Mücket

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/312430

Subject(s) - cosmic microwave background , physics , galaxy cluster , astrophysics , black body radiation , intracluster medium , cluster (spacecraft) , galaxy groups and clusters , galaxy , cosmology , anisotropy , population , radiation , optics , demography , sociology , computer science , programming language

If the mean properties of clusters of galaxies are well described by the entropy-driven model, the distortion induced by the cluster population on the blackbody spectrum of the cosmic microwave background radiation is proportional to the total amount of intracluster gas, while temperature anisotropies are dominated by the contribution of 1014 M middle dot in circle clusters. This result depends marginally on cluster parameters, and it can be used to estimate the number density of clusters with enough hot gas to produce a detectable Sunyaev-Zeldovich effect. Comparing different cosmological models, the relation depends mainly on the density parameter Omegam. If the number density of clusters could be estimated by a different method, then this dependence could be used to constrain Omegam.

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