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Although the search for azimutal patterns in cosmological surveys is usefulto characterise some effects depending exclusively on an angular distancewithin the standard model, they are considered as a key distinguishing featureof some exotic scenarios, such as bubble collisions or conformal cycliccosmology (CCC). In particular, the CCC is a non-stardard framework whichpredicts circular patterns on the CMB intensity fluctuations. Motivated by someprevious works which explore the presence of radial gradients, we apply amethodology based on the radial derivatives to the latest release of\textit{Planck} data. The new approach allows exhaustive studies to beperformed at all sky directions at a HEALPix resolution of $N_{\mathrm{side}} =1024$. Specifically, two different analyses are performed focusing on weightfunctions in both small (up to a $5$-degree radius) and large scales. Wepresent a comparison between our results and those shown by An et al. (2017),and An et al. (2018). In addition, a possible polarization counterpart of thesecircular patterns is also analysed for the most promising case. Taking intoaccount the limitations to characterize the significance of the results,including the possibility of suffering a look-elsewhere effect, no strongevidence of the kind of circular patterns expected from CCC is found in the\textit{Planck} data for either the small or the large scales.

Radial derivatives as a test of pre-Big-Bang events on the Planck data