Description
Zoom link: https://rediris.zoom.us/j/83767424733
Axion heliioscopes such as CAST have been used to search for dark photons and, in the absence of their detection, set a limit on dark photon parameters. I am using similar analysis to determine the parameter space that IAXO will be able to explore, and will extend this analysis to include the mixing of different polarisations of solar plasmons by the sun's magnetic field and how this mixing...
In this talk I will discuss the features of the formation of shadows around some (ultra)-compact objects due to the presence of light rings surrounding the central depression of optically-thin accretion disks. The shapes of the shadows might reveal novel spacetime structures beyond the well known Kerr family, such that future observations of additional light rings through very-long baseline...
