碩士 / 國立中央大學 / 太空科學研究所 / 86 / abstractThe physics of the Earth's bow shock had beenstudied by
many scientists. Fairfield[1971]proposed a hyperbolic model to
best fit the Earth's bow shock position. We find that a
parabolic curve is more agreed with the shape of the bow shock
from observations of ISEE2 (International Sun-Earth Explorer2)
and IMP8.The parabloic model is described in the form r=r0[2/(1+
cos(thi))]**(alpha).The model has twoparameter r0 and (alpha),
representing respectively the standoff distance and the level of
flaring,which are varied with the z component of interplanetary
magnetic field (IMF)Bz, solar windMach number Mms and dynamic
pressure Dp. With thisrelation, we can predict the position and
shape ofthe bow shock for a given solar wind condition. The
best-fit results show that the size of the bow shock decreases
while the magnitude of southward IMFincreases. It is due to the
size of the magnetopause decreases by the southward IMF. The
value of r0 decreases when the Mach number Mms increase, but
vicecersa for the flaring (alpha).
| Identifer | oai:union.ndltd.org:TW/086NCU00069006 |
| Date | January 1998 |
| Creators | Yen, Chi Tai, 顏均泰 |
| Contributors | J. K. Chao, 趙寄昆, |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 1 |
Page generated in 0.0327 seconds