The High-latitude Magnetopause: Shape and Location

Details The High-latitude Magnetopause: Shape and Location The High-latitude Magnetopause: Shape and Location

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm41b0797s&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM41B-0797

Physics

2724 Magnetopause, Cusp, And Boundary Layers, 2728 Magnetosheath, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

A number of magnetopause models have been developed in ourse of last three decades but the most of them were checked with low-latitude magnetopause crossings, whereas the shape and location of the high-latitude magnetopause is still under discussion. We have chosen several models including those developed for high latitudes and tested them using a fresh set of magnetopause crossings observed by INTERBALL-1 and MAGION-4 satellites. The crossings cover the magnetopause from the subsolar region up to near-Earth tail XGSE = -20 Re and all geomagnetic latitudes. Our study reveals that (1) the difference between investigated models is smaller than the error of prediction caused by the factors not included into models, (2) the dayside magnetopause is indented in the cusp region, (3) the deepness of the indentation can reach 4 Re, and (4) the dimensions of the indentation do not depend on the dipole tilt, whereas its location does.

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