Research output per year
Research output per year
Melissa Lopez*, Pietro Bonizzi, Kurt Driessens, Gideon Koekoek, Jacco de Vries, Ronald Westra
Research output: Contribution to journal › Article › Academic › peer-review
In this research, we present an alternative methodology to search for ring-like structures in the sky with unusually large temperature gradients, namely, Hawking points (HPs), in the Cosmic Microwave Background (CMB), which are possible observational effects associated with Conformal Cyclic Cosmology (CCC). To assess the performance of our method, we constructed an artificial data set of HP, according to CCC, and we were able to retrieve 95 per cent of ring-like anomalies from it. Furthermore, we scanned the Planck CMB sky map and compared it to simulations according to ΛCDM, where we applied robust statistical tests to assess the existence of HP. Even though no significant ring-like structures were observed, we report the largest excess of HP candidates found at α =1 per cent significance level for the analysed sky maps (CMB at 70GHz, SEVEM, SMICA, and Commander-Ruler), and we stress the need to continue the theoretical and experimental research in this direction.
Original language | English |
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Pages (from-to) | 922-930 |
Number of pages | 9 |
Journal | Monthly Notices of the Royal Astronomical Society: Letters |
Volume | 519 |
Issue number | 1 |
DOIs | |
Publication status | Published - Feb 2023 |
Research output: Working paper / Preprint › Preprint