Conveners
Late-time cosmology
- Yvonne Wong (The University of New South Wales)
Neutrino decay interaction with scalar majorons naturally arises from Standard Model extensions to model neutrino mass generation. The interaction if present during the CMB epoch has the potential to disrupt neutrino free streaming and hence the CMB anisotropy spectra. This has been previously studied as a cosmological constraint on neutrino lifetime. In this work, we model the decay...
The sigma8-tension of Planck data with weak lensing and redshift surveys is one of the main problems with the LambdaCDM model of cosmology. We show that the tension can be alleviated by introducing an interaction between dark matter and neutrinos. We model the interaction using a linear Boltzmann treatment, introducing a novel implementation that for the first time uses the full massive...
Minkowski functionals are set of descriptors used to describe the morphological structures of a field. CMB weak lensing, a powerful probe which imprinting projective information of matter distribution in the universe all the way back to the last scattering surface. With Minkowski functionals, one can reveal much more statistical features in the CMB lensing observations and eventually tighter...
Features in the CMB data have been discussed for a long time without striking evidence for or against them. Could the analysis of the data be the reason for this lack of evidence? Is there beyond LCDM physics hiding in the Planck CMB data? Applying a popular machine learning algorithm known as Bayesian Optimisation to Planck CMB can help us to find features in the data. Looking at modulations...
I will motivate why H0 tension may be indicative of a breakdown in the cosmological principle.
