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arXiv 0902.2711astro-ph.CO
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WMAP的数据支持中微子质量和冷暗物质与暗能量之间的耦合吗?

Do WMAP data favor neutrino mass and a coupling between Cold Dark Matter and Dark Energy?

G. La Vacca, J. R. Kristiansen, L. P. L. Colombo, R. Mainini, S. A. Bonometto

摘要:

在暗能量(DE)是一个自相互作用的标量场的宇宙学框架内,我们同时考虑了CDM-DE耦合和非零中微子质量。在它们的0- 0版本中,即在没有耦合和中微子质量的情况下,这些宇宙学提供了对WMAP、SNIa和深星系样品光谱的极好拟合,至少和\LambdaCDM一样好。当新的自由度是开放的,我们发现,CDM-DE耦合和显着的中微子质量(~0.1eV每ν物种)至少是可能的0- 0选项,在某些情况下,甚至统计上有利。结果是通过使用蒙特卡罗马尔可夫链的方法。

英文摘要:

Within the frame of cosmologies where Dark Energy (DE) is a self--interacting scalar field, we allow for a CDM--DE coupling and non--zero neutrino masses, simultaneously. In their 0--0 version, i.e. in the absence of coupling and neutrino mass, these cosmologies provide an excellent fit to WMAP, SNIa and deep galaxy sample spectra, at least as good as \LambdaCDM. When the new degrees of freedom are open, we find that CDM--DE coupling and significant neutrino masses (~0.1eV per νspecies) are at least as likely as the 0--0 option and, in some cases, even statistically favoured. Results are obtained by using a Monte Carlo Markov Chain approach.

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