In this thesis we developed, validated and applied to data, the most advanced statistical tools to measure NG in the high resolution CMB datasets coming from the Planck satellite First Cosmology Public Release. In particular, our efforts were conveyed to the development of the so called (Komatsu-Spergel-Wandelt) KSW estimator (Komatsu et al. 2005), the Planck breeded version of the estimator used by the WMAP team, that was selected as a front-runner estimator for NG for the Planck first public release. Moreover, we developed a second estimator, the Skew-Cl (Munshi and Heavens 2010). This estimator has the advantage to estimate NG in armonic space giving rise the possibility to study possible contamination that can be present in the data. In the conclusion we will describe and discuss the results we obtained, showing not only the numbers, but focusing in particular on their robustness, achieved through an intense campaign of validation made inside the Planck collaboration, that allowed us to claim the final constraint on inflationary NG.

Primordial non-Gaussianity with Planck

Renzi, Alessandro
2013

Abstract

In this thesis we developed, validated and applied to data, the most advanced statistical tools to measure NG in the high resolution CMB datasets coming from the Planck satellite First Cosmology Public Release. In particular, our efforts were conveyed to the development of the so called (Komatsu-Spergel-Wandelt) KSW estimator (Komatsu et al. 2005), the Planck breeded version of the estimator used by the WMAP team, that was selected as a front-runner estimator for NG for the Planck first public release. Moreover, we developed a second estimator, the Skew-Cl (Munshi and Heavens 2010). This estimator has the advantage to estimate NG in armonic space giving rise the possibility to study possible contamination that can be present in the data. In the conclusion we will describe and discuss the results we obtained, showing not only the numbers, but focusing in particular on their robustness, achieved through an intense campaign of validation made inside the Planck collaboration, that allowed us to claim the final constraint on inflationary NG.
10-mag-2013
Inglese
Baccigalupi, Carlo
SISSA
Trieste
File in questo prodotto:
File Dimensione Formato  
1963_6614_PhD_Thesis_Alessandro_Renzi.pdf

accesso aperto

Dimensione 10.15 MB
Formato Adobe PDF
10.15 MB Adobe PDF Visualizza/Apri

I documenti in UNITESI sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14242/168818
Il codice NBN di questa tesi è URN:NBN:IT:SISSA-168818