Cosmology with the Planck satellite

ISAS 「宇宙科学談話会（第32回）」

講師:   Francois R. Bouchet (Institut D’Astrophysique de Paris)
http://www2.iap.fr/users/bouchet/bouchet.html

題目:   Cosmology with the Planck satellite

           Space Science Colloquium

Date:       16:30-17:30, 9th of December (Wed), 2015
Place:    　 Conference room (Main building 2F)
Speaker:     Francois R. Bouchet (Institut D’Astrophysique de Paris)
Title:       Cosmology with the Planck satellite

Abstract: Sketched out in 1992, selected by ESA in 1996, and launched in 
2009, the Planck satellite was shut off in 2013, after a measuring 
mission that exceeded all expectations. The Planck collaboration 
delivered a first set of cosmological data and results in March 21st 
2013, and the full set in February 2015. Part of the data delivery is a 
"definitive" map of the anisotropies of the Cosmic Microwave Background 
(CMB), its angular power spectrum together with their full statistical 
characterisation. The 2015 delivery also includes pioneering 
polarisation data. The temperature anisotropy map displays minuscule 
variations as a function of the observing direction, of rms ~100microK,  
of the fossil radiation around its mean temperature of 2.725K. Other 
maps reveal the CMB polarisation. The anisotropies are the imprint of   
the primordial fluctuations which initiated the growth of the large 
scale structures of the Universe, as transformed by their evolution, in 
particular during the first 370 000 years. The polarisation is another 
imprint whose theoretical implications can then be confronted with those 
derived from the temperature field. I will described the results we 
obtained  so far from temperature and polarisation data, both in terms 
of content of the universe and of characteristics of the primordial 
fluctuations.