부산대학교 도서관

The European Space Agency (hereafter ESA) Planck satellite was launched on May 2009 and hasbeen surveying the microwave and the submillimeter sky since August 2009. In March 2013, ESAand the Planck Collaboration publicly released the initial cosmology products based on the first 15.5months of Planck operations. In this contribution we present the first cosmological results basedon Planck measurements of the Cosmic Microwave Radiation temperature and lensing-potentialpower spectra. The Planck spectra at high multipoles are well described by the standard LambdaCold Dark Matter (CDM) cosmological model based on six parameters. We find a low value ofthe Hubble parameter, H0 = 67.3 ± 1.2 km/s/Mpc, and, consequently, an high value of the matterparameter densitym = 0.315±0.017 (±1 errors), in agreement with the measurements of baryonacoustic oscillation (BAO) surveys. We also present results from several possible extensions of thestandard cosmological model, by using astrophysical datasets in addition to the Planck data. Noneof these models are favored significantly over the standard CDM. Using BAO and CMB data, wefind Neff = 3.30 ± 0.27 for the effective number of relativistic degrees of freedom, and an upperlimit of 0.25 eV for the summed neutrino mass.