47 citations · 82 across the 2 of their papers we have counts for
2 papers
astro-ph2008★ 47 cited
Probing the Effective Number of Neutrino Species with Cosmic Microwave Background
Kazuhide Ichikawa, Toyokazu Sekiguchi, Tomo Takahashi
We discuss how much we can probe the effective number of neutrino species N_nu with cosmic microwave background alone. Using the data of WMAP, ACBAR, CBI and BOOMERANG experiments,…
astro-ph2007★ 35 cited
Primordial Helium Abundance from CMB: a constraint from recent observations and a forecast
Kazuhide Ichikawa, Toyokazu Sekiguchi, Tomo Takahashi
We studied a constraint on the primordial helium abundance Y_p from current and future observations of CMB. Using the currently available data from WMAP, ACBAR, CBI and BOOMERANG,…