NDLI: Cosmology with Planck

Content Provider	Springer Nature Link
Author	Pagano, Luca
Copyright Year	2014
Abstract	The European Space Agency (hereafter ESA) Planck satellite was launched on May 2009 and has been surveying the microwave and the submillimeter sky since August 2009. In March 2013, ESA and the Planck Collaboration publicly released the initial cosmology products based on the first 15.5 months of Planck operations. In this contribution we present the first cosmological results based on Planck measurements of the Cosmic Microwave Radiation temperature and lensing-potential power spectra. The Planck spectra at high multipoles are well described by the standard Lambda Cold Dark Matter (?CDM) cosmological model based on six parameters. We find a low value of the Hubble parameter, H $_{0}$ = 67.3 ± 1.2 km/s/Mpc, and, consequently, an high value of the matter parameter density Ω$_{ m }$ = 0.315±0.017 (±1σ errors), in agreement with the measurements of baryon acoustic oscillation (BAO) surveys. We also present results from several possible extensions of the standard cosmological model, by using astrophysical datasets in addition to the Planck data. None of these models are favored significantly over the standard ?CDM. Using BAO and CMB data, we find N $_{ eff }$ = 3.30 ± 0.27 for the effective number of relativistic degrees of freedom, and an upper limit of 0.25 eV for the summed neutrino mass.
Starting Page	821
Ending Page	826
Page Count	6
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	65
Issue Number	6
e-ISSN	19768524
Language	English
Publisher	The Korean Physical Society
Publisher Date	2014-10-23
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cosmic Microwave Radiation Theoretical, Mathematical and Computational Physics Cosmology Physics Particle and Nuclear Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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