preprintJournal of Cosmology and Astroparticle PhysicsMar 1, 2026GREEN OA

A search for super-imposed oscillations to the primordial power spectrum in Planck and SPT-3G 2018 data

AAAkhil AntonyFFF. Finelli⋆DKDhiraj Kumar HazraDPD. PaolettiASArman Shafieloo

Pohang University of Science and Technology · Asia Pacific Center for Theoretical Physics · +7 more institutions

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Abstract

Abstract We search for super-imposed oscillations linearly or logarithmically spaced in Fourier wavenumbers k in Planck and South Pole Telescope (SPT-3G) 2018 temperature and polarization data. The SPT-3G temperature and polarization data provide a new window to test these oscillations at high multipoles beyond the Planck angular resolution and sensitivity. We consider linear and logarithmic oscillations with a constant amplitude, or with a power-law dependence or a Gaussian modulation, always in k . These models correspond to three, four and five additional parameters beyond power-law primordial power spectrum for the templates considered, respectively. We find that each of the five models considered can…

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Topics & keywords

Topics
Keywords
  • Planck
  • Physics
  • Spectral density
  • Power (physics)
  • Spectrum (functional analysis)
  • Astrophysics
  • Theoretical physics
  • Astronomy
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