High-energy cosmic-ray electrons and positrons cool rapidly as they propagate through the Galaxy, due to synchrotron interactions with magnetic fields and inverse-Compton scattering interactions with photons of the interstellar radiation field. Typically, these energy losses have been modelled as a continuous process. However, inverse-Compton scattering is a stochastic process, characterised...
Stage IV galaxy redshift surveys will sample the large-scale structure of the Universe over unprecedented volumes with high-density tracers, allowing for precise measurements of the clustering statistics. In order to properly exploit the full potential of such data, a robust likelihood pipeline is required, starting with an accurate theoretical prediction of cosmological observables, down to...
We analyze the formation of the redshifted hyperfine structure line 21-cm of hydrogen atoms in Dark Ages at 50≤z≤500 in the different cosmologies. To study its dependence on the values of cosmological parameters and physical conditions in the intergalactic medium, the evolution of the global (sky-averaged) differential brightness temperature in this line was computed in standard and...
The Indian Pulsar Timing Array Consortium (InPTA) is an Indo-Japanese collaboration which does precision timing of millisecond pulsars with the upgraded Giant Metrewave Radio Telescope (uGMRT) and is part of the International Pulsar timing array since 2021. The InPTA effort stands out with its unique ability to simultaneously monitor IPTA pulsars in the L and P bands using the uGMRT. Our...
