The Nature of Dark Energy from deep Cluster Abundance
msra(2004)
摘要
We show that using the redshift dependence of the deep cluster abundance to
detect the nature of Dark Energy is a serious challenge. We compare the
expected differences between flat LCDM models, with different Omega_mo, with
the difference between LCDM and dynamical DE models. In the former case,
cluster abundances in comoving volume and geometrical factors act in the same
direction, yielding a significant difference between the expected angular
densities. On the contrary, when we keep a constant Omega_mo and change the DE
nature,abundances in comoving volume and geometrical factors act in the
opposite direction, so that the expected differences in angular densities
reduce to small factors.
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关键词
astrophysics,dark energy
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