Constraining Running Non-Gaussianity (2009)
Sefusatti, Emiliano, Liguori, Michele, Yadav, Amit P. S., Jackson, Mark G., Pajer, Enrico
The primordial non-Gaussian parameter fNL has been shown to be scale-dependent in several models of inflation with a variable speed of sound. Starting from a simple ansatz for a scale-dependent...
Constraining a spatially dependent rotation of the Cosmic Microwave Background Polarization (2009)
Yadav, Amit P. S., Biswas, Rahul, Su, Meng, Zaldarriaga, Matias
Following Kamionkowski (2008), a quadratic estimator of the rotation of the plane of polarization of the CMB is constructed. This statistic can estimate a spatially varying rotation angle. We use...
Su, Meng, Yadav, Amit P. S., Zaldarriaga, Matias
In this paper, we study the effects of instrumental systematics on the reconstruction of the deflection angle power spectrum from weak lensing of Cosmic Microwave Background (CMB) temperature and...
Yadav, Amit P. S., Wandelt, Benjamin D.
We present evidence for the detection of primordial non-Gaussianity of the local type (fNL), using the temperature information of the Cosmic Microwave Background (CMB) from the WMAP 3-year data. We...
Yadav, Amit P. S., Komatsu, Eiichiro, Wandelt, Benjamin D., Liguori, Michele, Hansen, Frode K., Matarrese, Sabino
In our recent paper (Yadav et al. 2007) we described a fast cubic (bispectrum) estimator of the amplitude of primordial non-Gaussianity of local type, f_{NL}, from a combined analysis of the Cosmic...
Yadav, Amit P. S., Komatsu, Eiichiro, Wandelt, Benjamin D.
Measurements of primordial non-Gaussianity ($f_{NL}$) open a new window onto the physics of inflation. We describe a fast cubic (bispectrum) estimator of $f_{NL}$, using a combined analysis of...