923 citations
- Homi Bhabha National InstituteIN173 papers
- Tata Institute of Fundamental ResearchIN31 papers
- Saha Institute of Nuclear PhysicsIN26 papers
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- Indian Association for the Cultivation of ScienceIN21 papers
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4 papers · 2 filters
Probing primordial non-Gaussianity: The 3D Bispectrum of Ly-alpha forest and the redshifted 21-cm signal from the post reionization epoch
Tapomoy Guha Sarkar, Dhiraj Kumar Hazra
We explore possibility of using the three dimensional bispectra of the Ly-alpha forest and the redshifted 21-cm signal from the post-reionization epoch to constrain primordial non-…
Changes in the halo formation rates due to features in the primordial spectrum
Dhiraj Kumar Hazra
Features in the primordial scalar power spectrum provide a possible roadway to describe the outliers at the low multipoles in the WMAP data. Apart from the CMB angular power spectr…
The scalar bi-spectrum during preheating in single field inflationary models
Dhiraj Kumar Hazra, Jerome Martin, L. Sriramkumar
In single field inflationary models, preheating refers to the phase that immediately follows inflation, but precedes the epoch of reheating. During this phase, the inflaton typical…
Primordial Non-Gaussianity in the Forest: 3D Bispectrum of Ly-alpha Flux Spectra Along Multiple Lines of Sight
Dhiraj Kumar Hazra, Tapomoy Guha Sarkar
We investigate the possibility of constraining primordial non-Gaussianity using the 3D bispectrum of Ly-alpha forest. The strength of the quadratic non-Gaussian correction to an ot…