New constraints on cosmological parameters and neutrino properties using the expansion rate of the Universe to z~1.75
New constraints on cosmological parameters and neutrino properties using the expansion rate of the Universe to z~1.75
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DOI：
10.1088/1475-7516/2012/07/053
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发表时间：
2012-01
期刊：
影响因子：
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通讯作者：
Michele Moresco;L. Verde;L. Pozzetti;R. Jimenez;A. Cimatti
中科院分区：
文献类型：
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作者：
Michele Moresco;L. Verde;L. Pozzetti;R. Jimenez;A. Cimatti
我们使用相同的数据集组合，汇编了用宇宙计时器的微分演化估计的观测哈勃参数的汇编，在95%CL(74%CL)的红移范围04中。在68%的置信度水平下，我们还对中微子质量之和设定了竞争极限，即0.24 eV。这些结果已被证明对许多可能的系统效应具有极强的稳健性，例如用于估计H(Z)的恒星群合成模型的初始选择和前驱偏差。
We have assembled a compilation of observational Hubble parameter measurements estimated with the differential evolution of cosmic chronometers, in the redshift range 0 4 at 95% CL (74% CL) using the same datasets combinations. We also put competitive limits on the sum of neutrino masses, \Sigma m_\nu<0.24 eV at 68% confidence level. These results have been proven to be extremely robust to many possible systematic effects, such as the initial choice of stellar population synthesis model adopted to estimate H(z) and the progenitor-bias.