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Early Universe Constraints on Time Variation of Fundamental Constants
Susana J. Landau, Mercedes E. Mosquera, Claudia G. Scoccola +1
We study the time variation of fundamental constants in the early Universe. Using data from primordial light nuclei abundances, CMB and the 2dFGRS power spectrum, we put constraint…
Time variation of the fine structure constant in the early universe and the Bekenstein model
Mercedes E. Mosquera, Claudia G. Scoccola, Susana J. Landau +1
We calculate bounds on the variation of the fine structure constant at the time of primordial nucleosynthesis and at the time of neutral hydrogen formation. We use these bounds and…
The formation and evolution of hydrogen-deficient post-AGB white dwarfs: the emerging chemical profile and the expectations for the PG1159-DB-DQ evolutionary connection
L. G. Althaus, A. M. Serenelli, J. A. Panei +3
This paper is designed to explore the formation and evolution of hydrogen-deficient post-AGB white dwarfs. To this end, we compute the complete evolution of an initially 2.7 M_sun…
B polarization of the CMB from Faraday rotation
Claudia Scoccola, Diego Harari, Silvia Mollerach
We study the effect of Faraday rotation due to a homogeneous magnetic field on the polarization of the cosmic microwave background (CMB). Scalar fluctuations give rise only to pari…