5 papers
Understanding the non-Gaussian nature of Galactic foreground emissions towards small scales
Fazlu Rahman, Pravabati Chingangbam, Kevin Huffenberger +4
We present a unified, multi-scale study of non-Gaussianity of Galactic foreground emissions using Minkowski Functionals and generalized skewness-kurtosis parameters, focusing on th…
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…
Updated Constraints on Infrared Cutoff Models and Implications for Large-Scale CMB Anomalies
Ujjwal Upadhyay, Yashi Tiwari, Tarun Souradeep
The nearly scale-invariant primordial power spectrum provides the standard initial conditions for cosmological perturbations. However, the largest scales remain only weakly constra…
Leakage of power from dipole to higher multipoles due to non-symmetric WMAP beam
Santanu Das, Tarun Souradeep
A number of studies of WMAP and Planck claimed the low multipole (specially quadrupole) power deficiency in CMB power spectrum. Anomaly in the orientations of the low multipoles ha…
Statistical Isotropy Violations in CMB Temperature Anisotropy: Analysis Using Minimal Bipolar Spherical Harmonics
Dipanshu, Akashdeep Karan, Tarun Souradeep
In this work, we present a follow-up to our previous work where the concept of minimal Bipolar spherical harmonics (mBipoSH) functions was introduced as a natural basis for studyin…