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- Indian Institute of Technology GandhinagarIN282 papers
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5 papers · 2 filters
Revisiting a pre-inflationary radiation era and its effect on the CMB power spectrum
Suratna Das, Gaurav Goswami, Jayanti Prasad +1
We revisit the scenario where inflation is preceded by a radiation era by considering that the inflaton too could have been in thermal equilibrium early in the radiation era. Hence…
Thawing quintessence from the inflationary epoch to today
Gaveshna Gupta, Raghavan Rangarajan, Anjan A. Sen
Using the latest observational data we obtain a lower bound on the initial value of the quintessence field in thawing quintessence models of dark energy. For potentials of the form…
Comment on "Cosmic radio dipole from NVSS and WENSS"
Ashok K. Singal
We show that a recent purported correction to the effects of Doppler boosting of flux density in an erstwhile published formula for calculating the observer's motion from the cosmi…
Peculiar motion of the solar system derived from a dipole anisotropy in the redshift distribution of distant quasars
Ashok K. Singal
An observer stationary with respect to comoving coordinates of the expanding universe should find the redshift distribution to be isotropic. However, a peculiar motion of the obser…
from ten well-measured time delay lenses
S. Rathna Kumar, C. S. Stalin, T. P. Prabhu
In this work, we present a homogeneous curve-shifting analysis using the difference-smoothing technique of the publicly available light curves of 24 gravitationally lensed quasars,…