Could dark matter interactions be an alternative to dark energy?

被引：0

作者：

Basilakos, S. ^{[1
]}

Plionis, M. ^{[2
]}

机构：

[1] Research Center for Astronomy, Academy of Athens, 11527 Athens, Greece

[2] Institute of Astronomy and Astrophysics, National Observatory of Athens, Thessio 11810, Athens, Greece

来源：

Astronomy and Astrophysics | 2009年 / 507卷 / 01期

关键词：

We study the global dynamics of the universe within the framework of the interacting dark matter (IDM) scenario. Assuming that the dark matter obeys the collisional Boltzmann equation; we can derive analytical solutions of the global density evolution; that can accommodate an accelerated expansion; equivalent to either the quintessence or the standard models; with the present time located after the inflection point. This is possible if there is a disequilibrium between the DM particle creation and annihilation processes with the former process dominating; which creates an effective source term with negative pressure. Comparing the predicted Hubble expansion of one of the IDM models (the simplest) with observational data; we find that the effective annihilation term is quite small; as suggested by various experiments. © 2009 ESO;

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摘要：

Journal article (JA)

引用

页码：47 / 52

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