What Density of Magnetosheath Sodium Ions Can Provide the Observed Decrease in the Magnetic Field of the “Double Magnetopause” during the First MESSENGER Flyby?
On 14 January 2008, the MESSENGER spacecraft, during its first flyby around Mercury, recorded the magnetic field structure, which was later called the “double magnetopause”. The role of sodium ions penetrating into the Hermean magnetosphere from the magnetosheath in generation of this structure has...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | Symmetry |
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| Online Access: | https://www.mdpi.com/2073-8994/13/7/1168 |
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| author | Elena Belenkaya Ivan Pensionerov |
| author_facet | Elena Belenkaya Ivan Pensionerov |
| author_sort | Elena Belenkaya |
| collection | DOAJ |
| description | On 14 January 2008, the MESSENGER spacecraft, during its first flyby around Mercury, recorded the magnetic field structure, which was later called the “double magnetopause”. The role of sodium ions penetrating into the Hermean magnetosphere from the magnetosheath in generation of this structure has been discussed since then. The violation of the symmetry of the plasma parameters at the magnetopause is the cause of the magnetizing current generation. Here, we consider whether the change in the density of sodium ions on both sides of the Hermean magnetopause could be the cause of a wide diamagnetic current in the magnetosphere at its dawn-side boundary observed during the first MESSENGER flyby. In the present paper, we propose an analytical approach that made it possible to determine the magnetosheath Na<sup>+</sup> density excess providing the best agreement between the calculation results and the observed magnetic field in the double magnetopause. |
| first_indexed | 2024-03-10T09:58:51Z |
| format | Article |
| id | doaj.art-9967bf1a95b249ba97428054aec81faf |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-03-10T09:58:51Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-9967bf1a95b249ba97428054aec81faf2023-11-22T02:09:02ZengMDPI AGSymmetry2073-89942021-06-01137116810.3390/sym13071168What Density of Magnetosheath Sodium Ions Can Provide the Observed Decrease in the Magnetic Field of the “Double Magnetopause” during the First MESSENGER Flyby?Elena Belenkaya0Ivan Pensionerov1Skobeltsyn Institute of Nuclear Physics (SINP MSU), Federal State Budget Educational Institution of Higher Education, M. V. Lomonosov Moscow State University, 1(2), Leninskie gory, GSP-1, 119991 Moscow, RussiaSkobeltsyn Institute of Nuclear Physics (SINP MSU), Federal State Budget Educational Institution of Higher Education, M. V. Lomonosov Moscow State University, 1(2), Leninskie gory, GSP-1, 119991 Moscow, RussiaOn 14 January 2008, the MESSENGER spacecraft, during its first flyby around Mercury, recorded the magnetic field structure, which was later called the “double magnetopause”. The role of sodium ions penetrating into the Hermean magnetosphere from the magnetosheath in generation of this structure has been discussed since then. The violation of the symmetry of the plasma parameters at the magnetopause is the cause of the magnetizing current generation. Here, we consider whether the change in the density of sodium ions on both sides of the Hermean magnetopause could be the cause of a wide diamagnetic current in the magnetosphere at its dawn-side boundary observed during the first MESSENGER flyby. In the present paper, we propose an analytical approach that made it possible to determine the magnetosheath Na<sup>+</sup> density excess providing the best agreement between the calculation results and the observed magnetic field in the double magnetopause.https://www.mdpi.com/2073-8994/13/7/1168Mercurydouble magnetopausesodium ionsNa<sup>+</sup> |
| spellingShingle | Elena Belenkaya Ivan Pensionerov What Density of Magnetosheath Sodium Ions Can Provide the Observed Decrease in the Magnetic Field of the “Double Magnetopause” during the First MESSENGER Flyby? Symmetry Mercury double magnetopause sodium ions Na<sup>+</sup> |
| title | What Density of Magnetosheath Sodium Ions Can Provide the Observed Decrease in the Magnetic Field of the “Double Magnetopause” during the First MESSENGER Flyby? |
| title_full | What Density of Magnetosheath Sodium Ions Can Provide the Observed Decrease in the Magnetic Field of the “Double Magnetopause” during the First MESSENGER Flyby? |
| title_fullStr | What Density of Magnetosheath Sodium Ions Can Provide the Observed Decrease in the Magnetic Field of the “Double Magnetopause” during the First MESSENGER Flyby? |
| title_full_unstemmed | What Density of Magnetosheath Sodium Ions Can Provide the Observed Decrease in the Magnetic Field of the “Double Magnetopause” during the First MESSENGER Flyby? |
| title_short | What Density of Magnetosheath Sodium Ions Can Provide the Observed Decrease in the Magnetic Field of the “Double Magnetopause” during the First MESSENGER Flyby? |
| title_sort | what density of magnetosheath sodium ions can provide the observed decrease in the magnetic field of the double magnetopause during the first messenger flyby |
| topic | Mercury double magnetopause sodium ions Na<sup>+</sup> |
| url | https://www.mdpi.com/2073-8994/13/7/1168 |
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