IALP   13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
WMAP 5-year constraints on time variation of alpha and m_e
Autor/es:
SCÓCCOLA, CLAUDIA G.; LANDAU, SUSANA. J.; VUCETICH, HECTOR
Lugar:
Rio de Janeiro, Brasil
Reunión:
Simposio; IAU 2009 Joint Discussion 9; 2009
Resumen:
We studied the role of fundamental constants in an updated recombination scenario, focusing on the time variation of the fine structure constant alpha and the electron mass m_e in the early Universe. Using CMB data including WMAP 5-yr release, and the 2dFGRS power spectrum, we put bounds on variations of these constants, when both constants are allowed to vary, and in the case that only one of them is variable. In particular, we have found that -0.019 < ensuremath {Dlta alpha / alpha_0 < 0.017 (95% c.l.), in our joint estimation of alpha and cosmological parameters. Finally, we analyze how the constraints depends on the recombination scenario.