Here we further investigate the evidence for a closed universe from Planck, showing that positive curvature naturally explains the anomalous lensing amplitude and demonstrating that it also removes a well-known tension within the Planck data set concerning the values of cosmological parameters derived at different angular scales. The recent Planck Legacy 2018 release has confirmed the presence of an enhanced lensing amplitude in CMB power spectra compared to that predicted in the standard CDM model. Institutions.

More information: Eleonora Di Valentino et al. Planck evidence for a closed Universe and a possible crisis for cosmology, Nature Astronomy (2019). Scientists have long been convinced the universe was shaped like that sheet of paper. Jobs. Without CMB lensing or BAO, Planck 2018 has a moderate preference for closed universes, with Bayesian betting odds of over 50:1 against a flat universe, and over 2000:1 against an open universe.

A closed Universe can provide a physical explanation for this effect, with the Planck cosmic microwave … Seminars New. Authors. ArXiv discussions for 564 institutions including University of Maryland, UCI, University of Arkansas, Edinburgh, and Surrey Astro. Planck evidence for a closed Universe and a possible crisis for cosmology Anomalies have always been crucial for bettering our understanding of the Universe. Planck evidence for a closed Universe and a possible crisis for cosmology. Here we further investigate the evidence for a closed universe from Planck, showing that positive curvature naturally explains the anomalous lensing amplitude and demonstrating that it also removes a well-known tension within the Planck …

Discussion. But the new paper suggests that could be wrong, and it is not flat but rather closed.

“Here, we further investigate the evidence for a closed universe from Planck, showing that positive curvature naturally explains the anomalous lensing amplitude.” However, as with most things in astrophysics and theoretical physics, it is not quite that simple. Abstract. Conferences.

The recent Planck Legacy 2018 release has confirmed the presence of an enhanced lensing amplitude in cosmic microwave background power spectra compared with that predicted in the standard Λ cold dark matter model, where Λ is the cosmological constant.

Literature. All other cosmological data suggests the universe is flat, meaning it has no curvature, similar to a sheet of paper. Planck evidence for a closed Universe and a possible crisis for cosmology. A closed universe can provide a physical explanation for this effect, with the Planck CMB spectra now preferring a positive curvature at more than $99 \%$ C.L. A closed universe can provide a physical explanation for this effect, with the Planck CMB spectra now preferring a positive curvature at … A curved Universe may explain this one anomaly, but there are several big problems - not least of which is that all other analyses of Planck datasets , including the 2018 legacy data, have concluded that our cosmological models are … "Here, we further investigate the evidence for a closed Universe from Planck, showing that positive curvature naturally explains the anomalous lensing amplitude." Newly released data from the Planck Telescope, which aimed to take very precise readings of the shape, size and ancient history of our universe, suggests …