New ways of Constraining Models Of The Early Universe Using combined CMB Temperature and Polarization Information.

Details New ways of Constraining Models Of The Early Universe Using combined CMB Temperature and Polarization Information. New ways of Constraining Models Of The Early Universe Using combined CMB Temperature and Polarization Information.

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21111005p&link_type=abstract

American Astronomical Society, AAS Meeting #211, #110.05; Bulletin of the American Astronomical Society, Vol. 39, p.939

Astronomy and Astrophysics

Astronomy

Scientific paper

In my doctorate work I have developed new ways of constraining the models of the early universe using the Cosmic Microwave Background (CMB) temperature and E polarization data. We have demonstrated that the CMB temperature and E polarization data have a complementary information. We utilize the complementarity between CMB temperature and E polarization information to build statistical methods to constrain models of the early universe. In particular, we have developed bispectrum estimators for constraining the primordial non-Gaussianity (fNL). The motivation for studying primordial non-Gaussianity comes from its connection to the models of the early universe. Inflation is the most promising theory of the early universe and there are a plethora of inflationary models which predict a wide range of non-Gaussianities in the primordial perturbations. Characterizing these non-Gaussianities allows us to constrain the models of the early universe. In my talk, first I will briefly discuss the kinds of non-Gaussianities we expect from the models of the early universe (inflation in particular), and the current state of constraints on the primordial non-Gaussianity. Second, I will describe how our method using combined CMB temperature and E polarization information improves the constraints on the primordial non-Gaussianity i.e models of the early universe.

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