Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison of results on $N_\mathrm{eff}$ from various Planck
  likelihoods   In this paper, we study the estimation of the effective number of
relativistic species from a combination of CMB and BAO data. We vary different
ingredients of the analysis: the Planck high-$\ell$ likelihoods, the Boltzmann
solvers, and the statistical approaches. The variation of the inferred values
gives an indication of an additional systematic uncertainty, which is of the
same order of magnitude as the error derived from each individual likelihood.
We show that this systematic is essentially associated to the assumptions made
in the high-$\ell$ likelihoods implementations, in particular for the
foreground residuals modellings. We also compare a subset of likelihoods using
only the TE power spectra, expected to be less sensitive to foreground
residuals.

4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg