Publication Date:
2022-04-22
Description:
We use Minkowski Functionals (MF) to constrain a primordial non-Gaussian contribu-
tion to the CMB intensity field as observed in the 150 GHz and 145 GHz BOOMERanG
maps from the 1998 and 2003 flights, respectively, performing for the first time a joint
analysis of the two datasets. A perturbative expansion of the MF formulae in the limit
of a weakly non-Gaussian field yields analytical formulae, derived by Hikage et al.
(2006), which can be used to constrain the coupling parameter fNL without the need
for non-Gaussian simulations. We find -1020 〈 fNL 〈 390 at 95% CL, significantly
improving the previous constraints by De Troia et al. (2007) on the BOOMERanG
2003 dataset. These are the best fNL limits to date for suborbital probes.
Description:
Published
Description:
1658–1665
Description:
5IT. Osservazioni satellitari
Description:
JCR Journal
Description:
open
Keywords:
Cosmology: early Universe
;
cosmic microwave backgroundation
;
Boomerang
;
methods:statistical – analytical
;
05. General::05.07. Space and Planetary sciences::05.07.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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