Hybrid Simulations of solar wind interaction with magnetized asteroids: Comparisons with observations of the whistler wing

Details Hybrid Simulations of solar wind interaction with magnetized asteroids: Comparisons with observations of the whistler wing Hybrid Simulations of solar wind interaction with magnetized asteroids: Comparisons with observations of the whistler wing

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.p12c0510b&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #P12C-0510

Physics

6025 Interactions With Solar Wind Plasma And Fields, 6030 Magnetic Fields And Magnetism, 6050 Plasma And Mhd Instabilities

Scientific paper

We use a 2-D hybrid code to simulate the interaction of the solar wind with an asteroid. Understanding the nature of this interaction and of the signatures such as whistlers waves that can be generated in the perturbed region can help us to establish the strength of magnetization of the asteroid. We model the asteroid magnetic field as a dipole with different strengths and consider different geometries between the interplanetary magnetic field and the solar wind flow. Galileo observations showed the existence of a whistler wing near Gaspra and of a magnetic perturbation near Ida. In contrast, no magnetic signature was observed by the NEAR-Shoemaker spacecraft in the vicinity of 433 Eros. Previous works have compared Galileo observations with Hall-MHD simulations. In this work we compare the results of hybrid simulations (fluid electrons and particle ions) with Galileo observations near Gaspra and Ida. The use of an hybrid code will allow us to understand the role that kinetic effects play in the interaction region.

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