Details

The Vector Mode in the Second-order Cosmological Perturbation Theory


The Vector Mode in the Second-order Cosmological Perturbation Theory


Springer Theses

von: Shohei Saga

103,52 €

Verlag: Springer
Format: PDF
Veröffentl.: 11.01.2018
ISBN/EAN: 9789811080074
Sprache: englisch

DRM-geschütztes eBook, Sie benötigen z.B. Adobe Digital Editions und eine Adobe ID zum Lesen.

Beschreibungen

This thesis sheds valuable new light on the second-order cosmological perturbation theory, extensively discussing it in the context of cosmic microwave background (CMB) fluctuations. It explores the observational consequences of the second-order vector mode, and addresses magnetic field generation and the weak lensing signatures, which are key phenomena of the vector mode. The author demonstrates that the second-order vector mode, which never appears at the linear-order level, naturally arises from the non-linear coupling of the first-order scalar modes. This leads to the remarkable statement that the vector-order mode clearly contributes to the generation of cosmological magnetic fields. Moreover, the weak lensing observations are shown to be accessible to the vector mode. On the basis of ongoing and forthcoming observations, the thesis concludes that the second-order vector mode is detectable.
Introduction.- Basics of Cosmological Perturbation Theory.- Generation of Magnetic Fields.- Weak Lensing.- 21cm Lensing in the Dark Ages.- Summary of this Thesis.
Dr. Shohei Saga is a JSPS research Fellow at Yukawa Institute for Theoretical Physics, Kyoto University. His work mainly involves observational cosmology. He received his Bachelor of Science from Nagoya University in 2012, and his Master and Doctor of Science from the Department of Physics, Nagoya University in 2014 and 2017, respectively.  In March 2014, he was awarded the 2013 Dean Prize by the Department of Physics, Nagoya University.
This thesis sheds valuable new light on the second-order cosmological perturbation theory, extensively discussing it in the context of cosmic microwave background (CMB) fluctuations. It explores the observational consequences of the second-order vector mode, and addresses magnetic field generation and the weak lensing signatures, which are key phenomena of the vector mode. The author demonstrates that the second-order vector mode, which never appears at the linear-order level, naturally arises from the non-linear coupling of the first-order scalar modes. This leads to the remarkable statement that the vector-order mode clearly contributes to the generation of cosmological magnetic fields. Moreover, the weak lensing observations are shown to be accessible to the vector mode. On the basis of ongoing and forthcoming observations, the thesis concludes that the second-order vector mode is detectable.
Nominated as an outstanding PhD thesis by the Nagoya University, Japan Skillfully describes the development of the complete formalism for the second-order cosmological perturbation theory, involving vector and tensor modesProposes a scenario of magnetic field generation in the second-order perturbation theoryQuantifies the weak lensing signals from the second-order vector and tensor modes to provide forecasts for future experiments

Diese Produkte könnten Sie auch interessieren:

Magnetic Fields in the Solar System
Magnetic Fields in the Solar System
von: Hermann Lühr, Johannes Wicht, Stuart A. Gilder, Matthias Holschneider
PDF ebook
154,69 €
The Vatican Observatory, Castel Gandolfo: 80th Anniversary Celebration
The Vatican Observatory, Castel Gandolfo: 80th Anniversary Celebration
von: Gabriele Gionti, S. J., Jean-Baptiste Kikwaya Eluo, S.J.
PDF ebook
178,49 €
Formation, Evolution, and Dynamics of Young Solar Systems
Formation, Evolution, and Dynamics of Young Solar Systems
von: Martin Pessah, Oliver Gressel
PDF ebook
154,69 €