Distance Priors from \emph{Planck} 2015 data

Abstract

We update the distance priors by adopting $Planck\text{TT,TE,EE}+\text{lowP}$ data released in 2015, and our results impose at least $30\%$ tighter constraints than those from $Planck\text{TT}+\text{lowP}$. Combining the distance priors with the combination of supernova Union~2.1 compilation of 580 SNe (Union~2.1) and low redshift Baryon Acoustic Oscillation (BAO) data, we constrain the cosmological parameters in the freely binned dark energy (FBDE) and FBDE$+{\Omega }_k$ models respectively, and find that the equations of state of dark energy in both models are consistent with $w=-1$. Furthermore, we show that the tension with the BAO data at $z=2.34$ from Ly$\alpha$ forest (Ly$\alpha$F) auto-correlation and Combined Ly$\alpha$F cannot be relaxed in the FBDE and FBDE$+{\Omega }_k$ models.

18 pages, 8 figures, 3 tables; minor correction, clarifications added

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