The Intrinsic Bispectrum of the Cosmic Microwave Background

Nonfiction, Science & Nature, Science, Physics, Gravity, Cosmology
Cover of the book The Intrinsic Bispectrum of the Cosmic Microwave Background by Guido Walter Pettinari, Springer International Publishing
View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart
Author: Guido Walter Pettinari ISBN: 9783319218823
Publisher: Springer International Publishing Publication: August 27, 2015
Imprint: Springer Language: English
Author: Guido Walter Pettinari
ISBN: 9783319218823
Publisher: Springer International Publishing
Publication: August 27, 2015
Imprint: Springer
Language: English

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.

View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart

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.

More books from Springer International Publishing

Cover of the book Towards Digital Enlightenment by Guido Walter Pettinari
Cover of the book Martin Heidegger by Guido Walter Pettinari
Cover of the book Logic-Based Program Synthesis and Transformation by Guido Walter Pettinari
Cover of the book Australia's Communities and the Boer War by Guido Walter Pettinari
Cover of the book Clays and Health by Guido Walter Pettinari
Cover of the book New Trends in Medical and Service Robots by Guido Walter Pettinari
Cover of the book Geographies of Urban Governance by Guido Walter Pettinari
Cover of the book Time, Technology and Narrative Form in Contemporary US Television Drama by Guido Walter Pettinari
Cover of the book Control and Operation of Grid-Connected Wind Farms by Guido Walter Pettinari
Cover of the book Economic and Social Impacts of Food Self-Reliance in the Caribbean by Guido Walter Pettinari
Cover of the book Michael Oakeshott's Political Philosophy of International Relations by Guido Walter Pettinari
Cover of the book Modern Approaches to Agent-based Complex Automated Negotiation by Guido Walter Pettinari
Cover of the book Engineering Dynamics by Guido Walter Pettinari
Cover of the book Software Developers as Users by Guido Walter Pettinari
Cover of the book Growth Through Innovation by Guido Walter Pettinari
We use our own "cookies" and third party cookies to improve services and to see statistical information. By using this website, you agree to our Privacy Policy