Thermal Sunyaev–Zel’dovich Effect in the IGM due to Primordial Magnetic Fields
In the present universe, magnetic fields exist with various strengths and on various scales. One possible origin of these cosmic magnetic fields is the primordial magnetic fields (PMFs) generated in the early universe. PMFs are considered to contribute to matter density evolution via Lorentz force a...
| Main Authors: | , , , , |
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| Format: | Article |
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MDPI AG
2018-12-01
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| Series: | Galaxies |
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| Online Access: | https://www.mdpi.com/2075-4434/6/4/143 |
| _version_ | 1819056105124265984 |
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| author | Teppei Minoda Kenji Hasegawa Hiroyuki Tashiro Kiyotomo Ichiki Naoshi Sugiyama |
| author_facet | Teppei Minoda Kenji Hasegawa Hiroyuki Tashiro Kiyotomo Ichiki Naoshi Sugiyama |
| author_sort | Teppei Minoda |
| collection | DOAJ |
| description | In the present universe, magnetic fields exist with various strengths and on various scales. One possible origin of these cosmic magnetic fields is the primordial magnetic fields (PMFs) generated in the early universe. PMFs are considered to contribute to matter density evolution via Lorentz force and the thermal history of intergalactic medium (IGM) gas due to ambipolar diffusion. Therefore, information about PMFs should be included in the temperature anisotropy of the Cosmic Microwave Background through the thermal Sunyaev⁻Zel’dovich (tSZ) effect in IGM. In this article, given an initial power spectrum of PMFs, we show the spatial fluctuation of mass density and temperature of the IGM and tSZ angular power spectrum created by the PMFs. Finally, we find that the tSZ angular power spectrum induced by PMFs becomes significant on small scales, even with PMFs below the observational upper limit. Therefore, we conclude that the measurement of tSZ anisotropy on small scales will provide the most stringent constraint on PMFs. |
| first_indexed | 2024-12-21T13:18:07Z |
| format | Article |
| id | doaj.art-6abf8e711c7842c9a42b99d543345984 |
| institution | Directory Open Access Journal |
| issn | 2075-4434 |
| language | English |
| last_indexed | 2024-12-21T13:18:07Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Galaxies |
| spelling | doaj.art-6abf8e711c7842c9a42b99d5433459842022-12-21T19:02:39ZengMDPI AGGalaxies2075-44342018-12-016414310.3390/galaxies6040143galaxies6040143Thermal Sunyaev–Zel’dovich Effect in the IGM due to Primordial Magnetic FieldsTeppei Minoda0Kenji Hasegawa1Hiroyuki Tashiro2Kiyotomo Ichiki3Naoshi Sugiyama4Department of Physics and Astrophysics, Nagoya University, Nagoya 464-8602, JapanDepartment of Physics and Astrophysics, Nagoya University, Nagoya 464-8602, JapanDepartment of Physics and Astrophysics, Nagoya University, Nagoya 464-8602, JapanDepartment of Physics and Astrophysics, Nagoya University, Nagoya 464-8602, JapanDepartment of Physics and Astrophysics, Nagoya University, Nagoya 464-8602, JapanIn the present universe, magnetic fields exist with various strengths and on various scales. One possible origin of these cosmic magnetic fields is the primordial magnetic fields (PMFs) generated in the early universe. PMFs are considered to contribute to matter density evolution via Lorentz force and the thermal history of intergalactic medium (IGM) gas due to ambipolar diffusion. Therefore, information about PMFs should be included in the temperature anisotropy of the Cosmic Microwave Background through the thermal Sunyaev⁻Zel’dovich (tSZ) effect in IGM. In this article, given an initial power spectrum of PMFs, we show the spatial fluctuation of mass density and temperature of the IGM and tSZ angular power spectrum created by the PMFs. Finally, we find that the tSZ angular power spectrum induced by PMFs becomes significant on small scales, even with PMFs below the observational upper limit. Therefore, we conclude that the measurement of tSZ anisotropy on small scales will provide the most stringent constraint on PMFs.https://www.mdpi.com/2075-4434/6/4/143magnetic fieldslarge-scale structuremagnetic turbulence |
| spellingShingle | Teppei Minoda Kenji Hasegawa Hiroyuki Tashiro Kiyotomo Ichiki Naoshi Sugiyama Thermal Sunyaev–Zel’dovich Effect in the IGM due to Primordial Magnetic Fields Galaxies magnetic fields large-scale structure magnetic turbulence |
| title | Thermal Sunyaev–Zel’dovich Effect in the IGM due to Primordial Magnetic Fields |
| title_full | Thermal Sunyaev–Zel’dovich Effect in the IGM due to Primordial Magnetic Fields |
| title_fullStr | Thermal Sunyaev–Zel’dovich Effect in the IGM due to Primordial Magnetic Fields |
| title_full_unstemmed | Thermal Sunyaev–Zel’dovich Effect in the IGM due to Primordial Magnetic Fields |
| title_short | Thermal Sunyaev–Zel’dovich Effect in the IGM due to Primordial Magnetic Fields |
| title_sort | thermal sunyaev zel dovich effect in the igm due to primordial magnetic fields |
| topic | magnetic fields large-scale structure magnetic turbulence |
| url | https://www.mdpi.com/2075-4434/6/4/143 |
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