Searching for Oscillations in the Primordial Power Spectrum: Constraints from Planck (Paper II)

Understand

We apply our recently developed code to search for resonance features in the Planck CMB temperature data.

• We search both for log spaced oscillations or linear spaced oscillations and compare our findings with results of our WMAP9 analysis and the Planck team analysis.
• While there are hints of log spaced resonant features present in the WMAP9 data, the significance of these features weaken with more data.
• With more accurate small scale measurements, we also find that the best fit frequency has shifted and the amplitude has been reduced.