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تسجيل مستخدم جديدEvolution of galaxy clusters in $Lambda$MDM cosmologies
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N.A. Arkhipova
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The time evolution of galaxy cluster abundance is used to constrain cosmological parameters in dark matter models containing a fraction of hot particles (massive neutrino). We test the modified MDM models with cosmic gravitational waves which are in agreement with observational data at $z=0$, and show that they do not pass the cluster evolution test and therefore should be ruled out. The models with a non-zero cosmological constant are in better agreement with the evolution test. We estimate $Omega_Lambda$ and find that it is strongly affected by a small fraction of hot dark matter: $0.4 <Omega_Lambda <0.8$ for $Omega_H /Omega_M <0.2$.
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