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Browsing by Author "Appleby, S"

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Ensemble Average of Three-dimensional Minkowski Tensors of a Gaussian Random Field in Redshift Space

Appleby, S; Joby, P. K; Pravabati, C; Park, C (IOP Publishing, 2019-11-20)

We present the ensemble expectation values for the translation-invariant, rank-2 Minkowski tensors in three dimensions, for a linearly redshift-space-distorted Gaussian random field. The Minkowski tensors W1 0,2, W2 0,2 ...
Minkowski tensors in three dimensions: probing the anisotropy generated by redshift space distortion

Appleby, S; Pravabati, C; Park, C; Yogendran, K. P; Joby, P. K (IOP Publishing, 2018-08)

We apply the Minkowski tensor statistics to three-dimensional Gaussian random fields. Minkowski tensors contain information regarding the orientation and shape of excursion sets that is not present in the scalar Minkowski ...
Minkowski Tensors in Two Dimensions: Probing the Morphology and Isotropy of the Matter and Galaxy Density Fields

Appleby, S; Pravabati, C; Park, C; Hong, S. E; Kim, J; Vidhya, G (IOP Publishing, 2018-05-10)

We apply the Minkowski tensor statistics to two-dimensional slices of the three-dimensional matter density field. The Minkowski tensors are a set of functions that are sensitive to directionally dependent signals in the ...
Morphology of 21cm brightness temperature during the Epoch of Reionization using Contour Minkowski Tensor

Akanksha, K; Pravabati, C; Appleby, S (IOP Publishing, 2019-09)

We use morphological descriptors, Betti numbers and Contour Minkowski Tensor (CMT) on 21cm brightness temperature excursion sets, to study the ionization and heating history of the intergalactic medium (IGM) during and ...
Morphology of CMB fields—effect of weak gravitational lensing

Goyal, Priya; Pravabati, C; Appleby, S (IOP Publishing, 2020-02)

We study the morphology of the cosmic microwave background temperature and polarization fields using the shape and alignment parameters, β and α, that are constructed from the contour Minkowski tensor. The primary goal of ...
A novel probe of ionized bubble shape and size statistics of the epoch of reionization using the contour Minkowski tensor

Akanksha, K; Pravabati, C; Appleby, S; Park, C (IOP Publishing, 2018-10)

We employ the rank-2 contour Minkowski tensor in two dimensions to probe length and time scales of ionized bubbles during the epoch of reionization. We demonstrate that ionized bubbles are not circular, and hence not ...
Tensor Minkowski Functionals for random fields on the sphere

Pravabati, C; Yogendran, K. P; Joby, P. K; Vidhya, G; Appleby, S; Park, C (IOP Publishing, 2017-12)

We generalize the translation invariant tensor-valued Minkowski Functionals which are defined on two-dimensional flat space to the unit sphere. We apply them to level sets of random fields. The contours enclosing ...

Browsing by Author "Appleby, S"

Browsing by Author "Appleby, S"

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