Statistical and Dynamical Decoupling of the IGM from Dark Matter
Although the gravitational field in the universe is dominated by dark matter, cosmological observations show that the statistical properties of cosmic baryonic matter are significantly and systematically decoupled from that of the underlying dark matter. The dynamical reason of the decoupling is the...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | Advances in Astronomy |
| Online Access: | http://dx.doi.org/10.1155/2011/492980 |
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| _version_ | 1832558714104578048 |
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| author | Li-Zhi Fang Weishan Zhu |
| author_facet | Li-Zhi Fang Weishan Zhu |
| author_sort | Li-Zhi Fang |
| collection | DOAJ |
| description | Although the gravitational field in the universe is dominated by dark matter, cosmological
observations show that the statistical properties of cosmic baryonic matter are significantly
and systematically decoupled from that of the underlying dark matter. The dynamical
reason of the decoupling is the difference of the nonlinear evolution of baryon fluid from that
of collisionless dark matter. In highly nonlinear regime, the cosmic baryon fluid on scale free
range evolves into the state of fully developed turbulence, of which the velocity field consists
of shocks, vortices and complex structures. This scenario provides a coherent explanation of
various phenomena referring to the statistical and dynamical decoupling of the IGM from
dark matter. |
| format | Article |
| id | doaj-art-3b589aa0e7e5496baf9570b27e54526f |
| institution | Kabale University |
| issn | 1687-7969 1687-7977 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Astronomy |
| spelling | doaj-art-3b589aa0e7e5496baf9570b27e54526f2025-02-03T01:31:44ZengWileyAdvances in Astronomy1687-79691687-79772011-01-01201110.1155/2011/492980492980Statistical and Dynamical Decoupling of the IGM from Dark MatterLi-Zhi Fang0Weishan Zhu1Department of Physics, University of Arizona, Tucson, AZ 85721, USADepartment of Physics, University of Arizona, Tucson, AZ 85721, USAAlthough the gravitational field in the universe is dominated by dark matter, cosmological observations show that the statistical properties of cosmic baryonic matter are significantly and systematically decoupled from that of the underlying dark matter. The dynamical reason of the decoupling is the difference of the nonlinear evolution of baryon fluid from that of collisionless dark matter. In highly nonlinear regime, the cosmic baryon fluid on scale free range evolves into the state of fully developed turbulence, of which the velocity field consists of shocks, vortices and complex structures. This scenario provides a coherent explanation of various phenomena referring to the statistical and dynamical decoupling of the IGM from dark matter.http://dx.doi.org/10.1155/2011/492980 |
| spellingShingle | Li-Zhi Fang Weishan Zhu Statistical and Dynamical Decoupling of the IGM from Dark Matter Advances in Astronomy |
| title | Statistical and Dynamical Decoupling of the IGM from Dark Matter |
| title_full | Statistical and Dynamical Decoupling of the IGM from Dark Matter |
| title_fullStr | Statistical and Dynamical Decoupling of the IGM from Dark Matter |
| title_full_unstemmed | Statistical and Dynamical Decoupling of the IGM from Dark Matter |
| title_short | Statistical and Dynamical Decoupling of the IGM from Dark Matter |
| title_sort | statistical and dynamical decoupling of the igm from dark matter |
| url | http://dx.doi.org/10.1155/2011/492980 |
| work_keys_str_mv | AT lizhifang statisticalanddynamicaldecouplingoftheigmfromdarkmatter AT weishanzhu statisticalanddynamicaldecouplingoftheigmfromdarkmatter |