Conveners
Monday
- Fabio Finelli (Istituto Nazionale di Astrofisica (INAF))
The presence of primordial magnetic fields (PMFs) at recombination
may be tested by current and future high precision CMB observations. The most sensitive impact on CMB anisotropies by PMFs seems to be baryon clumping on small scales. PMFs of weak strength could alleviate the Hubble tension, providing a tentative
indirect detection of PMFs at recombination. I present first results of ...
According to the paradigm of inflationary magnetogenesis, the magnetic fields observed on cosmological scales are generated by introducing a non-conformal coupling function in the standard electromagnetic action. Often, a parity violating term is also added to generate helical magnetic fields. In this talk, I will begin by discussing the effects of deviations from slow roll inflation on the...
We review the current status of CMB anisotropy, polarization and spectral distortion measurements, with particular attention to the impact of CMb measurements on the study of voids and filaments.
We study the generation of helical magnetic fields during inflation by considering a model which does not suffer from strong coupling or large back-reaction. We consider a hybrid axion-Ratra model where the EM part is coupled to a non-monotonic time-dependent function with a sharp transition during inflation. The magnetic power spectrum is scale-invariant up to transition and blue-shifted...
An extension of the Kibble mechanism to electroweak symmetry breaking shows the
production of cosmologically significant magnetic fields.
