"Acoustic" rings in the early Universe
"Acoustic" rings in the early Universe
In the years 1998 and 1999, I've published a paper concerning the appearance in the Cosmic Microwave Background anisotropies of a spherical relic from first order phase transitions in the early Universe. In another paper I outlined the formalism for predicting the anisotropies caused by symmetric (spherical and cylindrical). That allowed to predict the "sound" waves propagating outwards those structures, made by primordial plasma consisting in photons and charged particles tightly coupled together, reaching the horizon at the epoch, corresponding to about one degree in the sky. The prediction looked like the figure below. The extension of rings is about 1 degree in the sky.
In the years 1998 and 1999, I've published a paper concerning the appearance in the Cosmic Microwave Background anisotropies of a spherical relic from first order phase transitions in the early Universe. In another paper I outlined the formalism for predicting the anisotropies caused by symmetric (spherical and cylindrical). That allowed to predict the "sound" waves propagating outwards those structures, made by primordial plasma consisting in photons and charged particles tightly coupled together, reaching the horizon at the epoch, corresponding to about one degree in the sky. The prediction looked like the figure below. The extension of rings is about 1 degree in the sky.
