The Komatsu Spergel Wandelt estimator for oscillations in the cosmic microwave background bispectrum

Understand

Oscillating shapes of the primordial bispectrum are present in many inflationary models.

• The Planck experiment has recently published measurements of oscillating shapes, which were however limited to the efficient frequency range of the used analysis method.
• Here we study the KSW estimator for oscillations in the CMB bispectrum, that allows to examine arbitrary oscillation frequencies for separable oscillating bispectrum shapes.
• We study the precision with which amplitude, phase and frequency can be determined with our estimator.