03321nam 22005895 450 991030054870332120200701081950.0981-10-8007-010.1007/978-981-10-8007-4(CKB)4100000001795144(DE-He213)978-981-10-8007-4(MiAaPQ)EBC5219537(PPN)223956511(EXLCZ)99410000000179514420180113d2018 u| 0engurnn|008mamaatxtrdacontentcrdamediacrrdacarrierThe Vector Mode in the Second-order Cosmological Perturbation Theory /by Shohei Saga1st ed. 2018.Singapore :Springer Singapore :Imprint: Springer,2018.1 online resource (XIII, 136 p. 11 illus. in color.) Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053"Doctoral thesis accepted by the Nagoya University, Nagoya, Japan."981-10-8006-2 Includes bibliographical references at the end of each chapters.Introduction -- Basics of Cosmological Perturbation Theory -- Generation of Magnetic Fields -- Weak Lensing -- 21cm Lensing in the Dark Ages -- Summary of this Thesis.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.Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053CosmologyAstrophysicsGravitationCosmologyhttps://scigraph.springernature.com/ontologies/product-market-codes/P22049Astrophysics and Astroparticleshttps://scigraph.springernature.com/ontologies/product-market-codes/P22022Classical and Quantum Gravitation, Relativity Theoryhttps://scigraph.springernature.com/ontologies/product-market-codes/P19070Cosmology.Astrophysics.Gravitation.Cosmology.Astrophysics and Astroparticles.Classical and Quantum Gravitation, Relativity Theory.521.4Saga Shoheiauthttp://id.loc.gov/vocabulary/relators/aut835970MiAaPQMiAaPQMiAaPQBOOK9910300548703321The Vector Mode in the Second-order Cosmological Perturbation Theory2541122UNINA