3 papers
astro-ph.CO2026
Capturing statistical isotropy violation with rotational averages
Vaishali R, Dipayan Mukherjee, Tarun Souradeep
Recent high precision cosmological observations have revealed several anomalies in the Cosmic Microwave Background (CMB), indicating possible violations of statistical isotropy (nS…
astro-ph.CO2026
Scalar-induced gravitational waves from coherent initial states
Dipayan Mukherjee, H. V. Ragavendra, Shiv K. Sethi
We investigate the impact of statistical inhomogeneity and anisotropy in primordial scalar perturbations on the scalar-induced gravitational waves (SIGW). Assuming inflationary qua…
astro-ph.CO2025
Cosmological consequences of statistical inhomogeneity
H. V. Ragavendra, Dipayan Mukherjee, Shiv K. Sethi
A space-dependent mean for cosmological perturbations negates the ansatz of statistical homogeneity and isotropy, and hence ergodicity. In this work, we construct such a primordial…