TY - JOUR
T1 - Evidence for pearl-like magnetic island structures at dawn and dusk side magnetopause
AU - Teh, W. L.
AU - Hau, L. N.
N1 - Funding Information:
Acknowledgments. This research is supported by the National Science Council of the Republic of China under grants NSC92-2111-M-008-012 and NSC93-2111-M-008-009 to National Central University. The authors would like to thank B. U. Ö. Sonnerup for helpful comments.
PY - 2004
Y1 - 2004
N2 - Two-dimensional magnetopause structure with a series of pearl-like magnetic islands at the dawn side of the equatorial plane was reported earlier by Hau and Sonnerup (1999) from the AMPTE/IRM data by solving the Grad-Shafranov equation as a spatial initial value problem. This paper presents another rare event that appears like the image of the dawn event at the dusk side magnetopause based on the analysis of two years satellite data and similar reconstruction method. The two crossings occur at (x, y, z)=(7.13,-6.64, 0.4) and (7.93, 9.06,-1.89)RE with magnetopause normal ň being (0.85, -0.52, 0.003) and (0.82, 0.55,-0.17) in the GSE coordinates, respectively. Both events are tangential discontinuity-like structures with shear angles being 124° and 97° and convect tailward with the deHoffmann-Teller frame velocity VHT of (-141.88, -215.47, 72.48) and (-100.26, 144.52, 20.90) (km/s), respectively, that form approximately 90° from The magnetic field configurations in both cases show great similarity with the same island width of~500 km and aspect ratio of~0.2.
AB - Two-dimensional magnetopause structure with a series of pearl-like magnetic islands at the dawn side of the equatorial plane was reported earlier by Hau and Sonnerup (1999) from the AMPTE/IRM data by solving the Grad-Shafranov equation as a spatial initial value problem. This paper presents another rare event that appears like the image of the dawn event at the dusk side magnetopause based on the analysis of two years satellite data and similar reconstruction method. The two crossings occur at (x, y, z)=(7.13,-6.64, 0.4) and (7.93, 9.06,-1.89)RE with magnetopause normal ň being (0.85, -0.52, 0.003) and (0.82, 0.55,-0.17) in the GSE coordinates, respectively. Both events are tangential discontinuity-like structures with shear angles being 124° and 97° and convect tailward with the deHoffmann-Teller frame velocity VHT of (-141.88, -215.47, 72.48) and (-100.26, 144.52, 20.90) (km/s), respectively, that form approximately 90° from The magnetic field configurations in both cases show great similarity with the same island width of~500 km and aspect ratio of~0.2.
KW - Magnetopause
KW - current layer
KW - reconnection
KW - tearing-mode instability
UR - http://www.scopus.com/inward/record.url?scp=20744445044&partnerID=8YFLogxK
U2 - 10.1186/BF03352531
DO - 10.1186/BF03352531
M3 - 期刊論文
AN - SCOPUS:20744445044
SN - 1343-8832
VL - 56
SP - 681
EP - 686
JO - Earth, Planets and Space
JF - Earth, Planets and Space
IS - 7
ER -