George Efstathiou:
Planck's view of the cosmic microwave background:
cosmological parameters, fundamental physics
and early universe cosmology.



James G. Bartlett:
What Planck Tells Us about Large-Scale Structure

The Planck survey has unearthed a wealth of information on the state
of the Universe since recombination (i.e., since z~1000).  We learn
about large-scale structure in both luminous and dark matter through a
variety of techniques: reconstruction of the matter perturbations
through gravitational lensing of CMB anisotropies, mapping the
distribution of star-forming galaxies across time (cosmic infrared
background, CIB) and observation of the ionized gas through the
Sunyaev-Zeldovich (SZ) effect in galaxy clusters and as an unresolved,
diffuse background.  We will discuss these results, how they constrain
the cosmological model and how they address the key outstanding
question of the relation between luminous and dark matter.  In
particular, we find a strong correlation between the CIB and the
lensing signal, telling us about the dark matter halos hosting star-
forming galaxies.  We also find surprising tension between the
observed SZ signals and expectations based on the standard LCDM model
favored by Planck's primary CMB analysis.  This tension suggests
either the need for an extension to the base LCDM model or that
clusters are significantly more massive than previously thought.