Cosmological magnetic fields from inflation and backreaction
| Autor: | Jiro Soda, Masa Aki Watanabe, Sugumi Kanno |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
High Energy Physics - Theory
Inflation (cosmology) Physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) FOS: Physical sciences Astronomy and Astrophysics General Relativity and Quantum Cosmology (gr-qc) General Relativity and Quantum Cosmology Cosmology Magnetic field High Energy Physics - Phenomenology Theoretical physics High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Theory (hep-th) Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Journal of Cosmology and Astroparticle Physics. 2009:009-009 |
| ISSN: | 1475-7516 |
| DOI: | 10.1088/1475-7516/2009/12/009 |
| Popis: | We study the backreaction problem in a mechanism of magnetogenesis from inflation. In usual analysis, it has been assumed that the backreaction due to electromagnetic fields spoils inflation once it becomes important. However, there exists no justification for this assumption. Hence, we analyze magnetogenesis from inflation by taking into account the backreaction. On the contrary to the naive expectation, we show that inflation still continues even after the backreaction begins to work. Nevertheless, it turns out that creation of primordial magnetic fields is significantly suppressed due to the backreaction. Comment: 14 pages, 1 figure, references added |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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