IIA Institutional Repository

Browsing by Author "Pravabati, C"

Browsing by Author "Pravabati, C"

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  • Reheating in tachyonic inflationary models: Effects on the large scale curvature perturbations 
    Jain, R. K; Pravabati, C; Sriramkumar, L (Elsevier B.V., 2011-11)
    We investigate the problem of perturbative reheating and its effects on the evolution of the curvature perturbations in tachyonic inflationary models. We derive the equations governing the evolution of the scalar perturbations ...
  • Residual foreground contamination in the WMAP data 
    Pravabati, C; Park, C (IOP Publishing, 2014)
    We have studied whether there is any residual foreground contamination in the foreground reduced WMAP-7 data for the differential assemblies (DAs) Q, V and W. We have calculated the correlation between the foreground map, ...
  • Residual foreground contamination in the WMAP data and bias in non-Gaussianity estimation 
    Pravabati, C; Park, C (IOP Publishing, 2013-02)
    We analyze whether there is any residual foreground contamination in the cleaned WMAP 7 years data for the differential assemblies, Q, V and W. We calculate the correlation between the foreground map, from which long ...
  • Search for anomalous alignments of structures in planck data using minkowski tensors 
    Joby, P. K; Pravabati, C; Ghosh, T; Vidhya Ganesan; Ravikumar, C. D (IOP Publishing, 2019-01)
    Minkowski Tensors are tensorial generalizations of the scalar Minkowski Functionals. Due to their tensorial nature they contain additional morphological information of structures, in particular about shape and alignment, ...
  • Statistical properties of galactic synchrotron temperature and polarization maps — a multi-frequency comparison 
    Fazlu, Rahman; Pravabati, C; Ghosh, Tuhin (IOP Publishing, 2024-01)
    Understanding the statistical properties of synchrotron emission from our Galaxy is valuable from the perspective of observations targeting signals of cosmological origin, as well as for understanding physical processes ...
  • 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 ...
  • Tensor Minkowski Functionals: first application to the CMB 
    Vidhya, G; Pravabati, C (IOP Publishing, 2017-05)
    ensor Minkowski Functionals (TMFs) are tensor generalizations of the usual Minkowski Functionals which are scalar quantities. We introduce them here for use in cos- mological analysis, in particular to analyze ...
  • Understanding ghost interference 
    Qureshi, T; Pravabati, C; Shafaq, S (World Scientific Publishing Company, 2016-09)
    The ghost interference observed for entangled photons is theoretically analyzed using wave-packet dynamics. It is shown that ghost interference is a combined effect of virtual double-slit creation due to entanglement, and ...

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