Speaker
Description
Cosmic Microwave Background (CMB) has been well known as a proof of the hot
big bang model. In recent years, thanks to the precise observations by WMAP
and PLANCK satellites, we come to see the detailed structure of CMB
temperature (or polarization) fluctuations. In this work, we forces on the
irregular oscillations of their angular power spectra around multipole
$\ell\sim120$. These oscillations were indicated in the analysis of WMAP5 data by
Ichiki et al. (2010). We look for these oscillations in the 2015 year's PLANCK
temperature and polarization data by adopting a Markov-Chain Monte-Carlo
(MCMC) method. We find the oscillations in the data at $\ell \sim 123.7$ and their
amplitude is about $4.5\times10^{-9}$, which are consistent with those found in the
WMAP5 data. In this presentation, we talk about the result of the MCMC
analysis and the influence of the oscillations to the other cosmological
parameters.
