255 citations · 288 across the 7 of their papers we have counts for
8 papers
Constraints on Cosmic Birefringence from SPIDER, Planck, and ACT observations
Lu Yin, Shuhang Xiong, Joby Kochappan +2
The Early Dark Energy (EDE) model has been proposed as a candidate mechanism to generate cosmic birefringence through a Chern-Simons coupling between a dynamical scalar field and t…
Observational evidence for Early Dark Energy as a unified explanation for Cosmic Birefringence and the Hubble tension
Joby Kochappan, Lu Yin, Bum-Hoon Lee +1
We test the =3 Ultralight Axion-like model of Early Dark Energy (EDE) with the observationsof the mode of the cosmic microwave background (CMB) radiation, and local expansi…
Is Cosmic Birefringence model-dependent?
Lu Yin, Joby Kochappan, Tuhin Ghosh +1
Exciting clues to isotropic cosmic birefringence have recently been detected in the cross-power spectra of the polarization data of the cosmic microwave background (CMB). Earl…
Minkowski Tensors in Redshift Space -- Beyond the Plane Parallel Approximation
Stephen Appleby, Joby P. Kochappan, Pravabati Chingangbam +1
The Minkowski tensors (MTs) can be used to probe anisotropic signals in a field, and are well suited for measuring the redshift space distortion (RSD) signal in large scale structu…
Is the Observable Universe Consistent with the Cosmological Principle?
Pavan Kumar Aluri, Paolo Cea, Pravabati Chingangbam +20
The Cosmological Principle (CP) -- the notion that the Universe is spatially isotropic and homogeneous on large scales -- underlies a century of progress in cosmology. It is conven…
Application of Contour Minkowski Tensor and Statistic to the Planck -mode data
Joby P. Kochappan, Aparajita Sen, Tuhin Ghosh +2
We test the statistical isotropy (SI) of the -mode polarization of the Cosmic Microwave Background (CMB) radiation observed by the Planck satellite using two statistics, namely,…