497 citations · 8.4k across the 112 of their papers we have counts for
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Scaling configurations of cosmic superstring networks and their cosmological implications
Alkistis Pourtsidou, Anastasios Avgoustidis, Edmund J. Copeland +2
We study the cosmic microwave background temperature and polarisation spectra sourced by multi-tension cosmic superstring networks. First we obtain solutions for the characteristic…
Correlations between 21 cm Radiation and the CMB from Active Sources
Aaron Berndsen, Levon Pogosian, Mark Wyman
Neutral hydrogen is ubiquitous, absorbing and emitting 21 cm radiation throughout much of the Universe's history. Active sources of perturbations, such as cosmic strings, would gen…
Probing modifications of General Relativity using current cosmological observations
Gong-Bo Zhao, Tommaso Giannantonio, Levon Pogosian +5
We test General Relativity (GR) using current cosmological data: the cosmic microwave background (CMB) from WMAP5 (Komatsu et al. 2009), the integrated Sachs-Wolfe (ISW) effect fro…
How to optimally parametrize deviations from General Relativity in the evolution of cosmological perturbations
Levon Pogosian, Alessandra Silvestri, Kazuya Koyama +1
The next generation of weak lensing surveys will trace the growth of large scale perturbations through a sequence of epochs, offering an opportunity to test General Relativity (GR)…