276 citations · 3.9k across the 123 of their papers we have counts for
10 papers · 1 filter
Estimating SI violation in CMB due to non-circular beam and complex scan in minutes
Nidhi Pant, Santanu Das, Aditya Rotti +2
Mild, unavoidable deviations from circular-symmetry of instrumental beams along with scan strategy can give rise to measurable Statistical Isotropy (SI) violation in Cosmic Microwa…
Recovering hidden signals of statistical anisotropy from a masked or partial CMB sky
Pavan K. Aluri, Nidhi Pant, Aditya Rotti +1
Any isotropy violating phenomena on cosmic microwave background (CMB) induces off-diagonal correlations in the two-point function. These correlations themselves can be used to esti…
Bayesian inference on the sphere beyond statistical isotropy
Santanu Das, Benjamin D. Wandelt, Tarun Souradeep
We present a general method for Bayesian inference of the underlying covariance structure of random fields on a sphere. We employ the Bipolar Spherical Harmonic (BipoSH) representa…
Litmus Test for Cosmic Hemispherical Asymmetry in the Cosmic Microwave Background B-mode polarization
Suvodip Mukherjee, Tarun Souradeep
Recent measurements of the temperature field of Cosmic Microwave Background (CMB) provide tantalising evidence for violation of Statistical Isotropy (SI) that constitutes a fundame…
Weak lensing in non-statistically isotropic universes
Moumita Aich, Aditya Rotti, Tarun Souradeep
The Bipolar Spherical Harmonics (BipoSH) form a natural basis to study the CMB two point correlation function in a non-statistically isotropic (non-SI) universe. The coefficients o…
A novel approach to reconstructing signals of isotropy violation from a masked CMB sky
Pavan K. Aluri, Nidhi Pant, Aditya Rotti +1
Statistical isotropy (SI) is one of the fundamental assumptions made in cosmological model building. This assumption is now being rigorously tested using the almost full sky measur…