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Arxiv New Filter | Bookmarks & clubs | Arxiv ref/author:

discrepancy of ns-r diagram between getdist and official plot
 
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Jack Sparrow



Joined: 12 May 2016
Posts: 14
Affiliation: HK

PostPosted: June 06 2017  Reply with quote

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!!
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Antony Lewis



Joined: 23 Sep 2004
Posts: 1291
Affiliation: University of Sussex

PostPosted: June 07 2017  Reply with quote

Fig 21 does not marginalize over running.
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Jack Sparrow



Joined: 12 May 2016
Posts: 14
Affiliation: HK

PostPosted: June 07 2017  Reply with quote

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!
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Jason Dossett



Joined: 19 Mar 2010
Posts: 97
Affiliation: The University of Texas at Dallas

PostPosted: June 08 2017  Reply with quote

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