Solar wind interaction with small bodies: 2. What can Galileo's detection of magnetic rotations tell us about Gaspra and Ida
| Autor: | David J. Southwood, Z. Wang, Margaret G. Kivelson, R. J. Walker, C. Polanskey, Steven P. Joy, Krishan K. Khurana |
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| Rok vydání: | 1995 |
| Předmět: |
Physics
Atmospheric Science Magnetometer Aerospace Engineering Perturbation (astronomy) Astronomy Magnetosphere Astronomy and Astrophysics law.invention Magnetic field Astrobiology Magnetization Solar wind Geophysics Space and Planetary Science law Asteroid Physics::Space Physics General Earth and Planetary Sciences Astrophysics::Earth and Planetary Astrophysics Magnetic dipole |
| Zdroj: | Advances in Space Research. 16:59-68 |
| ISSN: | 0273-1177 |
| DOI: | 10.1016/0273-1177(95)00209-w |
| Popis: | As the Galileo spacecraft passed the asteroids Gaspra in 1990 and Ida in 1993, the magnetometer recorded changes in the solar wind magnetic field that we associate with the presence of the nearby body. This paper focuses on the types of interactions that can produce perturbations in the solar wind. We have suggested that the interaction at Gaspra is consistent with expectations of flow diversion by a magnetic dipole moment and an associated 'magnetosphere' whose scale size is much larger than the diameter of the solid body. The conditions for the Ida flyby leave more room for ambiguity. The observations could plausibly be related to either interaction with a magnetized body or with a conducting body. We will report on details of the observations that may enable us to distinguish between the different types of interaction and to provide quantitative estimates of the physical properties of the asteroids themselves. |
| Databáze: | OpenAIRE |
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