Martian Bow Shock and Magnetic Pile-Up Barrier Formation Due to the Exosphere Ion Mass-Loading
Bow shock, formed by the interaction between the solar wind and a planet, is generated in different patterns depending on the conditions of the planet. In the case of the earth, its own strong magnetic field plays a critical role in determining the position of the bow shock. However, in the case o...
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| Format: | Article |
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The Korean Space Science Society
2011-03-01
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| Series: | Journal of Astronomy and Space Sciences |
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| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2011/v28n1/OJOOBS_2011_v28n1_17.pdf |
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| author | Eojin Kim Jong-Dae Sohn Yu Yi Tatsuki Ogino Joo-Hee Lee Jae-Woo Park Young-Joo Song |
| author_facet | Eojin Kim Jong-Dae Sohn Yu Yi Tatsuki Ogino Joo-Hee Lee Jae-Woo Park Young-Joo Song |
| author_sort | Eojin Kim |
| collection | DOAJ |
| description | Bow shock, formed by the interaction between the solar wind and a planet, is generated in different patterns depending
on the conditions of the planet. In the case of the earth, its own strong magnetic field plays a critical role in determining
the position of the bow shock. However, in the case of Mars of which has very a small intrinsic magnetic field, the
bow shock is formed by the direct interaction between the solar wind and the Martian ionosphere. It is known that the
position of the Martian bow shock is affected by the mass loading-effect by which the supersonic solar wind velocity
becomes subsonic as the heavy ions originating from the planet are loaded on the solar wind. We simulated the Martian
magnetosphere depending on the changes of the density and velocity of the solar wind by using the three-dimensional
magnetohydrodynamic model built by modifying the comet code that includes the mass loading effect. The Martian
exosphere model of was employed as the Martian atmosphere model, and only the photoionization by the solar radiation
was considered in the ionization process of the neutral atmosphere. In the simulation result under the normal solar
wind conditions, the Martian bow shock position in the subsolar point direction was consistent with the result of the
previous studies. The three-dimensional simulation results produced by varying the solar wind density and velocity
were all included in the range of the Martian bow shock position observed by Mariner 4, Mars 2, 3, 5, and Phobos 2. Additionally,
the simulation result also showed that the change of the solar wind density had a greater effect on the Martian
bow shock position than the change of the solar wind velocity. Our result may be useful in analyzing the future observation
data by Martian probes. |
| first_indexed | 2024-03-08T07:19:43Z |
| format | Article |
| id | doaj.art-c585e8c0a07f4d0ba7856313d1969e5a |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T07:19:43Z |
| publishDate | 2011-03-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-c585e8c0a07f4d0ba7856313d1969e5a2024-02-02T23:55:24ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092011-03-01281172610.5140/JASS.2011.28.1.017Martian Bow Shock and Magnetic Pile-Up Barrier Formation Due to the Exosphere Ion Mass-LoadingEojin Kim0Jong-Dae Sohn1Yu Yi2Tatsuki Ogino3Joo-Hee Lee4Jae-Woo Park5Young-Joo Song6Department of Astronomy and Space Science, Chungnam National University, Daejeon 305-764, KoreaDepartment of Astronomy and Space Science, Chungnam National University, Daejeon 305-764, KoreaDepartment of Astronomy and Space Science, Chungnam National University, Daejeon 305-764, KoreaSolar-Terrestrial Environment Laboratory, Nagoya University, Aichi 442, JapanSpace Science Department, Space Application & Future Technology Center, Korea Aerospace Research Institute, Daejeon 305-333, KoreaSpace Science Department, Space Application & Future Technology Center, Korea Aerospace Research Institute, Daejeon 305-333, KoreaSpace Science Department, Space Application & Future Technology Center, Korea Aerospace Research Institute, Daejeon 305-333, KoreaBow shock, formed by the interaction between the solar wind and a planet, is generated in different patterns depending on the conditions of the planet. In the case of the earth, its own strong magnetic field plays a critical role in determining the position of the bow shock. However, in the case of Mars of which has very a small intrinsic magnetic field, the bow shock is formed by the direct interaction between the solar wind and the Martian ionosphere. It is known that the position of the Martian bow shock is affected by the mass loading-effect by which the supersonic solar wind velocity becomes subsonic as the heavy ions originating from the planet are loaded on the solar wind. We simulated the Martian magnetosphere depending on the changes of the density and velocity of the solar wind by using the three-dimensional magnetohydrodynamic model built by modifying the comet code that includes the mass loading effect. The Martian exosphere model of was employed as the Martian atmosphere model, and only the photoionization by the solar radiation was considered in the ionization process of the neutral atmosphere. In the simulation result under the normal solar wind conditions, the Martian bow shock position in the subsolar point direction was consistent with the result of the previous studies. The three-dimensional simulation results produced by varying the solar wind density and velocity were all included in the range of the Martian bow shock position observed by Mariner 4, Mars 2, 3, 5, and Phobos 2. Additionally, the simulation result also showed that the change of the solar wind density had a greater effect on the Martian bow shock position than the change of the solar wind velocity. Our result may be useful in analyzing the future observation data by Martian probes.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2011/v28n1/OJOOBS_2011_v28n1_17.pdfsolar windMarsbow shockmagnetosphereplasma |
| spellingShingle | Eojin Kim Jong-Dae Sohn Yu Yi Tatsuki Ogino Joo-Hee Lee Jae-Woo Park Young-Joo Song Martian Bow Shock and Magnetic Pile-Up Barrier Formation Due to the Exosphere Ion Mass-Loading Journal of Astronomy and Space Sciences solar wind Mars bow shock magnetosphere plasma |
| title | Martian Bow Shock and Magnetic Pile-Up Barrier Formation Due to the Exosphere Ion Mass-Loading |
| title_full | Martian Bow Shock and Magnetic Pile-Up Barrier Formation Due to the Exosphere Ion Mass-Loading |
| title_fullStr | Martian Bow Shock and Magnetic Pile-Up Barrier Formation Due to the Exosphere Ion Mass-Loading |
| title_full_unstemmed | Martian Bow Shock and Magnetic Pile-Up Barrier Formation Due to the Exosphere Ion Mass-Loading |
| title_short | Martian Bow Shock and Magnetic Pile-Up Barrier Formation Due to the Exosphere Ion Mass-Loading |
| title_sort | martian bow shock and magnetic pile up barrier formation due to the exosphere ion mass loading |
| topic | solar wind Mars bow shock magnetosphere plasma |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2011/v28n1/OJOOBS_2011_v28n1_17.pdf |
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