An anisotropic plasma model of the heliospheric interface
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866910821379997696 |
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| author | Florinski, Vladimir Balsara, Dinshaw S. Bhoriya, Deepak Zank, Gary P. Biswas, Shishir Sharma, Swati Subramanian, Sethupathy |
| author_facet | Florinski, Vladimir Balsara, Dinshaw S. Bhoriya, Deepak Zank, Gary P. Biswas, Shishir Sharma, Swati Subramanian, Sethupathy |
| contents | We present a pioneering model of the interaction between the solar wind and the surrounding interstellar medium that includes the possibility of different pressures in directions parallel and perpendicular to the magnetic field. The outer heliosheath region is characterized by a low rate of turbulent scattering that would permit development of pressure anisotropy. The effect is best seen on the interstellar side of the heliopause, where a narrow region develops with an excessive perpendicular pressure resembling a plasma depletion layer typical of planetary magnetspheres. The magnitude of this effect for typical heliospheric conditions is relatively small owing to proton-proton collisions. We show, however, that if the circumstellar medium is warm and tenuous, a much broader anisotropic boundary layer can exist, with a dominant perpendicular pressure in the southern hemisphere and a dominant parallel pressure in the north. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_22589 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | An anisotropic plasma model of the heliospheric interface Florinski, Vladimir Balsara, Dinshaw S. Bhoriya, Deepak Zank, Gary P. Biswas, Shishir Sharma, Swati Subramanian, Sethupathy Space Physics Solar and Stellar Astrophysics Plasma Physics We present a pioneering model of the interaction between the solar wind and the surrounding interstellar medium that includes the possibility of different pressures in directions parallel and perpendicular to the magnetic field. The outer heliosheath region is characterized by a low rate of turbulent scattering that would permit development of pressure anisotropy. The effect is best seen on the interstellar side of the heliopause, where a narrow region develops with an excessive perpendicular pressure resembling a plasma depletion layer typical of planetary magnetspheres. The magnitude of this effect for typical heliospheric conditions is relatively small owing to proton-proton collisions. We show, however, that if the circumstellar medium is warm and tenuous, a much broader anisotropic boundary layer can exist, with a dominant perpendicular pressure in the southern hemisphere and a dominant parallel pressure in the north. |
| title | An anisotropic plasma model of the heliospheric interface |
| topic | Space Physics Solar and Stellar Astrophysics Plasma Physics |
| url | https://arxiv.org/abs/2410.22589 |