2014/04/06 by Baorong Chang, Lixin Xu, Chang, Baorong +1
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #Solar and Space Plasma Dynamics #astro-ph.CO #hep-ph
paper · pdf · doi:10.48550/arxiv.1404.1558
4 pages, 2 figures
arxiv created 2014/04/06 · arxiv updated 2014/04/08
In this brief report, we try to constrain general parameterized forms of scalar and tensor mode power spectra, Ps(k)≡ As(k/k0)ns-1+(1)/(2)αsln(k/k0) and Pt(k)≡ At(k/k0)nt+(1)/(2)αtln(k/k0) by the recently released BICEP2 data set plus \it Planck 2013, WMAP9 and BAO. We loosen the inflationary consistence relations, and take As, ns, At and nt as free model parameters, via the Markov chain Monte Carlo method, the interested model parameter space was investigated, we obtained marginalized 68% limits on the interested parameters are: ns=0.96339-0.00554+0.00560, nt=1.70490-0.56979+0.56104, \rmln(1010 As)=3.08682-0.02614+0.02353 and \rmln(1010 At)=3.98376-0.54885+0.86045. The ratio of the amplitude at the scale k=0.002 Mpc -1 is r=0.01655-0.01655+0.00011 which is consistent with the \it Planck 2013 result.