CosmoCoffee

[Jack Sparrow]

When I use the getdist to plot the ns-r diagram (base_nrun_r_plikHM_TT_lowTEB_BKP), I found that the r of solid line is almost 0.12,

While in the paper

https://arxiv.org/pdf/1502.01589.pdf

There is a similar plot, Fig.21. There, the corresponding value is around 0.1.

I am curious why there is a difference based on the same data. Can somebody explian? Thanks!!

[Antony Lewis]

Fig 21 does not marginalize over running.

[Jack Sparrow]

Thanks!! But would you mind being more specific? What do you mean running? What should I do if I want to get a similar figure as Fig.21?

Thanks!

[Jason Dossett]

Running refers to running of the spectral index (n_run). In the chains you used n_run was varied (and thus could be marginalized over). To produce figure 21, n_run was not varied so the constraints obtained will be slightly different.