From what i have read, right or wrong, there seems to be an universe (age) problem for modern cosmologists,(adsbygoogle = window.adsbygoogle || []).push({});

This is the best paper i have found on the subject.

http://arxiv.org/pdf/1402.6433v3.pdf

Abstract Many dark energy models fail to pass the cosmic age test. In this paper, we investigate the cosmic age problem associated with nine extremely old Global Clusters (GCs) and the old quasar APM 08279+5255 in the Rh = ct Universe. The age data of these oldest GCs in M31 is acquired from the Beijing-Arizona-TaiwanConnecticut system with up-to-date theoretical synthesis models. They have not been used to test the cosmic age problem in the Rh = ct Universe in previous literature. By evaluating the age of the Rh = ct Universe with the observational constraints from the type Ia supernovae and Hubble parameter, we find that the Rh = ct Universe can accommodate five GCs and the quasar APM 08279+5255 at redshift z = 3.91. But for other models, such as ΛCDM, interacting dark energy model, generalized Chaplygin gas model and holographic dark energy model, can not accommodate all GCs and the quasar APM 08279+5255. It is worthwhile to note that the age estimates of some GCs are controversial. So, unlike other cosmological models, the Rh = ct Universe can marginally solve the cosmic age problem, especially at high redshift

Are there any other factors that rule this paper out?

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# Age problem in the LCDM model

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