The intrinsic bispectrum of the cosmic microwave background [electronic resource] / Guido Walter Pettinari.
Pettinari, Guido Walter, author.
2016
QB991.C64 P48 2016eb
Available Online

Linked e-resources

Linked Resource Online Access
Concurrent users Unlimited
Authorized users Authorized users
Document Delivery Supplied Can lend chapters, not whole ebooks

Details

Title The intrinsic bispectrum of the cosmic microwave background [electronic resource] / Guido Walter Pettinari.
Author Pettinari, Guido Walter, author.
ISBN 9783319218823 (electronic book)
3319218824 (electronic book)
9783319218816
3319218816
DOI https://doi.org/10.1007/978-3-319-21882-3
Published Cham : Springer, 2016.
Language English
Description 1 online resource.
Item Number 10.1007/978-3-319-21882-3 doi
Call Number QB991.C64 P48 2016eb
Dewey Decimal Classification 523.1
Summary Nominated as an outstanding thesis by Professor Robert Crittenden of the Institute of Cosmology and Gravitation in Portsmouth, and winner of the Michael Penston Prize for 2014 given by the Royal Astronomical Society for the best doctoral thesis in Astronomy or Astrophysics, this work aims to shed light on one of the most important probes of the early Universe: the bispectrum of the cosmic microwave background. The CMB bispectrum is a potential window on exciting new physics, as it is sensitive to the non-Gaussian features in the primordial fluctuations, the same fluctuations that evolved into today?s planets, stars and galaxies. However, this invaluable information is potentially screened, as not all of the observed non-Gaussianity is of primordial origin. Indeed, a bispectrum arises even for perfectly Gaussian initial conditions due to non-linear dynamics, such as CMB photons scattering off free electrons and propagating in an inhomogeneous Universe. Dr. Pettinari introduces the reader to this intrinsic bispectrum in a pedagogic way, building up from the standard model of cosmology and from cosmological perturbation theory, the tool cosmologists use to unravel the history of the cosmos. In doing so, he introduces SONG, a new and efficient code for solving the second-order Einstein and Boltzmann equations. Next, he moves on to answer the crucial question: is the intrinsic bispectrum going to screen the primordial signal in the CMB? Using SONG, he computes the intrinsic bispectrum and shows how its contamination leads to a small bias in the estimates of primordial non-Gaussianity, a great news for the prospect of using CMB data to probe primordial non-Gaussianity.
Note "Doctoral thesis accepted by University of Portsmouth, United Kingdom."
Bibliography, etc. Note Includes bibliographical references and index.
Access Note Access limited to authorized users.
Series Springer theses.
Available in Other Form Print version: 9783319218816
Linked Resources Online Access
Record Appears in Online Resources > Ebooks
All Resources
Introduction
The Standard Model of Cosmology
Perturbation Theory
The Boltzmann Equation
Evolution of the Second-Order Perturbations
The Intrinsic Bispectrum of the CMB
Conclusions
Appendix A: Projection on the Sphere
Appendix B: Geometry of the Wavemodes.

Browse Subjects

Show more subjects...

Statistics

from
to
Export