Primordial power spectrum from Planck

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• Dhiraj Kumar Hazra (APCTP)
• Wednesday 06 August 2014, 13:15-13:45
• Sackler Lecture Theatre, IoA.

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Using modified Richardson-Lucy algorithm I shall demonstrate the reconstruction of the primordial power spectrum using the Cosmic Microwave Background temperature anisotropy data from Planck. I shall highlight the significant features in the primordial power spectrum through a proper error estimation. I shall also address the consistency of the primordial power spectrum reconstructed from Planck angular power spectrum in different frequency channels with WMAP -9 angular power spectrum data. I shall explore the degeneracy between primordial power spectrum features and the effects of CMB lensing. Towards the end I shall present two nearly smooth primordial power spectra, containing only the important features that provide significant improvement in fit to the Planck data compared to power law primordial power spectrum.

This talk is part of the Institute of Astronomy Seminars series.

This talk is included in these lists:

• Combined External Astrophysics Talks DAMTP
• Cosmology lists
• Cosmology, Astrophysics and General Relativity
• Institute of Astronomy Seminars
• Institute of Astronomy Talk Lists
• Kavli Institute for Cosmology Talk Lists
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• Sackler Lecture Theatre, IoA

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