Archive for arXiv:1905.05697

(No) Primordial Non-Gaussianity from Planck

Posted in The Universe and Stuff with tags , , on May 15, 2019 by telescoper

After yesterday’s decennial celebration of the launch of ESA’s Herschel and Planck missions, I noticed that this morning a new paper from the Planck Consortium has arrived on the arXiv. Coincidence?

The other 2018 `last’ papers from Planck were released last year.

Anyway, this is the long-awaited paper IX about primordial non-Gaussianity and the abstract is:

In a nutshell, there’s no evidence for primordial non-Gaussianity from the Planck observations. The paper is rather long, but well worth reading because it shows how much work has to go in to extract higher-order statistical information from CMB data. It’s far harder than the (second-order) power-spectrum, which is no doubt why this paper to so long to emerge.