The Planck mission: From first results to cosmology

Natoli, P. and Gruppuso, A. and Mandolesi, N. (2012) The Planck mission: From first results to cosmology. Il nuovo cimento C, 35 (6). pp. 5-10. ISSN 1826-9885

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Planck is an ESA satellite launched in May 2009, whose main objective is to image the anisotropies of the Cosmic Microwave Background Radiation and their linear polarizartion with unprecedented sensitivity, angular resolution and frequency leverage. Planck is providing high-quality data to be mined for decades to come. Planck results have been released starting January 2011 (“early results”) and February 2012 (“intermediate results”) and are limited to Galactic and extragalactic science. The first cosmological data products are awaited for early 2013. Planck has a wide list of scientific targets. Here we focus on constraining constraints about parity-violating models that go beyond Maxwell’s electromagnetism. We focus first on the in vacuo cosmological birefringence angle that constraints the rotation of the polarization plane of last scattered background photons. The latter can be nonnull only if there is a parity-violating coupling in the Maxwell Lagrangian. We also discuss the so-called parity anomaly claimed in the anisotropy intensity spectrum of the WMAP data (Kim and Naselsky, 2010). We describe the basic formalism, the relevant estimators and the overall analysis strategy. We finally forecast the capabilities of Planck in tightening the present constraints.

Item Type: Article
Uncontrolled Keywords: Cosmology
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 24 Apr 2020 16:23
Last Modified: 24 Apr 2020 16:23

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