Measuring the cosmological density field twice: A novel test of dark energy using the CMB quadrupole

Abstract

The scattering of cosmic microwave background (CMB) radiation in galaxy clusters induces polarization signals according to the quadrupole anisotropy in the photon distribution at the cluster location. This `remote quadrupole' derived from the measurements of the induced polarization provides an opportunity for reconstructing primordial fluctuations on large scales. We discuss that comparing the local CMB quadrupoles predicted by these reconstructed primordial fluctuations and the direct measurements done by CMB satellites may enable us to test the dark energy beyond cosmic variance limits.

6 pages, 3 figures, accepted version

References in corpus (4)

• Probing the Universe on Gigaparsec Scales with Remote Cosmic Microwave Background Quadrupole Measurements
• Detecting the polarization induced by scattering of the microwave background quadrupole in galaxy clusters
• Measuring Polarized Emission in Clusters in the CMB S4 Era
• Real space tomography of the primordial Universe with cluster polarization

Cited by in corpus (2)

• Validating dark energy models using polarised Sunyaev-Zel'dovich effect with large-angle CMB temperature and E-mode polarization anisotropies
• Searching optimal scales for reconstructing cosmological initial conditions using convolutional neural networks