Scale-dependent dipolar modulation and the quadrupole-octopole alignment
  in the CMB temperature
  The connection between the dipolar modulation asymmetry and the
quadrupole-octopole alignment in the CMB is studied in this work. First, a
generalization of the dipolar modulation model is proposed by considering that
the amplitude may depend on the scale. As derived from a Bayesian inference
analysis, this model fits the CMB data better than the scale-independent one.
As an extension of the standard model, the scale-dependent dipolar modulation
shows comparable evidence to the standard isotropic model in the large scales
($\ell_\mathrm{max} \leq 64$). The posterior distribution of the parameters of
the scale-dependent model suggests that the amplitude of the dipolar modulation
is large at the lowest multipoles. This large asymmetry induces a detectable
correlation between the quadrupole and the octopole. The significance of the
quadrupole-octopole alignment is analyzed under the assumption that the
Universe has a scale-dependent dipolar modulation. The three alignment
estimators considered in this paper show an increment of $80\%$ in the p-value,
showing a clear correlation between these two CMB anomalies. Within this new
scenario, only one of the alignment estimators is still below the $1\%$
probability level.
