Primordial Magnetic Field Effects on the CMB and Large-Scale Structure
Magnetic fields are everywhere in nature, and they play an important role in every astronomical environment which involves the formation of plasma and currents. It is natural therefore to suppose that magnetic fields could be present in the turbulent high-temperature environment of the big bang. Suc...
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| Format: | Article |
| Language: | English |
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Wiley
2010-01-01
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| Series: | Advances in Astronomy |
| Online Access: | http://dx.doi.org/10.1155/2010/586590 |
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| author | Dai G. Yamazaki Kiyotomo Ichiki Toshitaka Kajino Grant J. Mathews |
| author_facet | Dai G. Yamazaki Kiyotomo Ichiki Toshitaka Kajino Grant J. Mathews |
| author_sort | Dai G. Yamazaki |
| collection | DOAJ |
| description | Magnetic fields are everywhere in nature, and they play an important role in every astronomical environment which involves the formation of plasma and currents. It is natural therefore to suppose that magnetic fields could be present in the turbulent high-temperature environment of the big bang. Such a primordial magnetic field (PMF) would be expected to manifest itself in the cosmic microwave background (CMB) temperature and polarization anisotropies, and also in the formation of large-scale structure. In this paper, we summarize the theoretical framework which we have developed to calculate the PMF power spectrum to high precision. Using this formulation, we summarize calculations of the effects of a PMF which take accurate quantitative account of the time evolution of the cutoff scale. We review the constructed numerical program, which is without approximation, and an improvement over the approach used in a number of previous works for studying the effect of the PMF on the cosmological perturbations. We demonstrate how the PMF is an important cosmological physical process on small scales. We also summarize the current constraints on the PMF amplitude Bλ and the power spectral index
nB
which have been deduced from the available CMB observational data by using our computational framework. |
| format | Article |
| id | doaj-art-9b7c8339458a4e18be8bb6bc95891fa5 |
| institution | Kabale University |
| issn | 1687-7969 1687-7977 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Astronomy |
| spelling | doaj-art-9b7c8339458a4e18be8bb6bc95891fa52025-02-03T06:44:23ZengWileyAdvances in Astronomy1687-79691687-79772010-01-01201010.1155/2010/586590586590Primordial Magnetic Field Effects on the CMB and Large-Scale StructureDai G. Yamazaki0Kiyotomo Ichiki1Toshitaka Kajino2Grant J. Mathews3Institute of Astronomy and Astrophysics, Academia Sinica, National Taiwan University, 7F of Condensed Matter Sciences and Physics Department Building, No.1, Roosevelt Road, Section 4 Taipei 10617, TaiwanDepartment of Physics and Astrophysics, Nagoya University, Nagoya 464-8602, JapanTheory Division, National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, JapanCenter for Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USAMagnetic fields are everywhere in nature, and they play an important role in every astronomical environment which involves the formation of plasma and currents. It is natural therefore to suppose that magnetic fields could be present in the turbulent high-temperature environment of the big bang. Such a primordial magnetic field (PMF) would be expected to manifest itself in the cosmic microwave background (CMB) temperature and polarization anisotropies, and also in the formation of large-scale structure. In this paper, we summarize the theoretical framework which we have developed to calculate the PMF power spectrum to high precision. Using this formulation, we summarize calculations of the effects of a PMF which take accurate quantitative account of the time evolution of the cutoff scale. We review the constructed numerical program, which is without approximation, and an improvement over the approach used in a number of previous works for studying the effect of the PMF on the cosmological perturbations. We demonstrate how the PMF is an important cosmological physical process on small scales. We also summarize the current constraints on the PMF amplitude Bλ and the power spectral index nB which have been deduced from the available CMB observational data by using our computational framework.http://dx.doi.org/10.1155/2010/586590 |
| spellingShingle | Dai G. Yamazaki Kiyotomo Ichiki Toshitaka Kajino Grant J. Mathews Primordial Magnetic Field Effects on the CMB and Large-Scale Structure Advances in Astronomy |
| title | Primordial Magnetic Field Effects on the CMB and Large-Scale Structure |
| title_full | Primordial Magnetic Field Effects on the CMB and Large-Scale Structure |
| title_fullStr | Primordial Magnetic Field Effects on the CMB and Large-Scale Structure |
| title_full_unstemmed | Primordial Magnetic Field Effects on the CMB and Large-Scale Structure |
| title_short | Primordial Magnetic Field Effects on the CMB and Large-Scale Structure |
| title_sort | primordial magnetic field effects on the cmb and large scale structure |
| url | http://dx.doi.org/10.1155/2010/586590 |
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