Number counts in homogeneous and inhomogeneous dark energy models
نویسندگان
چکیده
منابع مشابه
Number counts in homogeneous and inhomogeneous dark energy models
In the simple case of a constant equation of state, redshift distribution of collapsed structures may constrain dark energy models. Different dark energy models having the same energy density today but different equations of state give quite different number counts. Moreover, we show that introducing the possibility that dark energy collapses with dark matter (“inhomogeneous” dark energy) signi...
متن کاملStructure Formation in Inhomogeneous Dark Energy Models
We investigate how inhomogeneous quintessence models may have a specific signature even in the linear regime of large scale structure formation. The dynamics of the collapse of a dark matter halo is governed by the value or the dynamical evolution of the dark energy equation of state, the energy density’s initial conditions and its homogeneity nature in the highly non–linear regime. These have ...
متن کاملCluster Number Counts Dependence on Dark Energy Inhomogeneities and Coupling to Dark Matter
Cluster number counts can be used to test dark energy models. We investigate dark energy candidates which are coupled to dark matter. We analyze the cluster number counts dependence on the amount of dark matter coupled to dark energy. Further more, we study how dark energy inhomogeneities affect cluster abundances. It is shown that increasing the coupling reduces significantly the cluster numbe...
متن کاملClusters number counts dependence on dark energy inhomogeneities and coupling to dark matter
Many dark energy candidates have been proposed to explain the accelerated expansion the universe seems to be currently undertaking. Discriminating between them is likely to be a major issue in the near future, and cluster number counts would be a good tool for this. In this article we study scalar field candidates to dark energy which are coupled to dark matter. We focus on comparing the cluste...
متن کاملGalaxy surveys, inhomogeneous reionization, and dark energy
We examine the effect of inhomogeneous reionization on the galaxy power spectrum and the consequences for probing dark energy. To model feedback during reionization, we apply an ansatz setting the galaxy overdensity proportional to the underlying ionization field. Thus, inhomogeneous reionization may leave an imprint in the galaxy power spectrum. We evolve this imprint to low redshift and use t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2006
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20053706