Geometrical Generation of Cosmic Magnetic Fields within Standard Electromagnetism
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| Format: | Artículo científico |
| Sprache: | en |
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Sociedade Brasileira de Física
2005
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| _version_ | 1876443124698447872 |
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| author | Christos G. Tsagas |
| author_facet | Christos G. Tsagas |
| contents | Geometrical Generation of Cosmic Magnetic Fields within Standard Electromagnetism Christos G. Tsagas Alejandra Kandus Física, Astronomía y Matemáticas We study the evolution of cosmological magnetic fields in FRW models with curved spatial sections andoutline a geometrical mechanism for their superadiabatic amplification on large scales. The mechanism operateswithin standard electromagnetic theory and applies to FRWuniverses with open spatial sections. We discuss thegeneral relativistic nature of the effect and show how it modifies the adiabatic magnetic evolution by reducingthe depletion rate of the field. Assuming a universe that is only marginally open today (i.e. for 1¡W0 » 10¡2),we estimate the main features of the superadiabatically amplified residual field and find that is of astrophysicalinterest. 2005 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46435714 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4B Vol.35 |
| format | Artículo científico |
| id | redalyc_46435714 |
| institution | Redalyc |
| language | en |
| publishDate | 2005 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Geometrical Generation of Cosmic Magnetic Fields within Standard Electromagnetism Christos G. Tsagas Física, Astronomía y Matemáticas Geometrical Generation of Cosmic Magnetic Fields within Standard Electromagnetism Christos G. Tsagas Alejandra Kandus Física, Astronomía y Matemáticas We study the evolution of cosmological magnetic fields in FRW models with curved spatial sections andoutline a geometrical mechanism for their superadiabatic amplification on large scales. The mechanism operateswithin standard electromagnetic theory and applies to FRWuniverses with open spatial sections. We discuss thegeneral relativistic nature of the effect and show how it modifies the adiabatic magnetic evolution by reducingthe depletion rate of the field. Assuming a universe that is only marginally open today (i.e. for 1¡W0 » 10¡2),we estimate the main features of the superadiabatically amplified residual field and find that is of astrophysicalinterest. 2005 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46435714 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4B Vol.35 |
| title | Geometrical Generation of Cosmic Magnetic Fields within Standard Electromagnetism |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46435714 |