Parity in Planck full-mission CMB temperature maps
Srikanta Panda, Pavan K. Aluri, Pramoda Kumar Samal, Pranati K., Rath
TL;DR
This paper investigates parity asymmetries in the Planck full-mission CMB temperature maps, analyzing power differences between even and odd multipoles and mirror parity preferences to test cosmological isotropy.
Contribution
It provides a detailed analysis of parity asymmetries in the latest Planck CMB data, focusing on multipole and mirror parity, which was not extensively studied before.
Findings
No significant parity asymmetry detected in the data.
Mirror parity preferences are consistent with isotropy expectations.
Results support the standard cosmological model's assumption of symmetry.
Abstract
In the standard model of cosmology, Cosmic Microwave Background (CMB) sky is expected to show no symmetry preferences. Following our previous studies, we explore the presence of any particular parity preference in the latest full-mission CMB temperature maps from ESA's Planck probe. Specifically, in this work, we will probe (a)symmetry in power between even and odd multipoles of CMB via it's angular power spectrum from Planck 2015 data. Further we also assess any specific preference for mirror parity (a)symmetry, by analysing the power contained in =even or odd mode combinations.
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