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The Vector Mode in the Second-order Cosmological Perturbation Theory: Springer Theses

Autor Shohei Saga
en Limba Engleză Hardback – 22 ian 2018
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.
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Specificații

ISBN-13: 9789811080067
ISBN-10: 9811080062
Pagini: 136
Ilustrații: XIII, 136 p. 11 illus. in color.
Dimensiuni: 155 x 235 mm
Greutate: 0.39 kg
Ediția:1st ed. 2018
Editura: Springer Nature Singapore
Colecția Springer
Seria Springer Theses

Locul publicării:Singapore, Singapore

Cuprins

Introduction.- Basics of Cosmological Perturbation Theory.- Generation of Magnetic Fields.- Weak Lensing.- 21cm Lensing in the Dark Ages.- Summary of this Thesis.

Notă biografică

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.

Textul de pe ultima copertă

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.

Caracteristici

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 modes Proposes a scenario of magnetic field generation in the second-order perturbation theory Quantifies the weak lensing signals from the second-order vector and tensor modes to provide forecasts for future experiments