Disappearance of the heliospheric sector structure at Ulysses
Disappearance of the heliospheric sector structure at Ulysses
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DOI：
10.1029/93gl02632
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发表时间：
1993-11
影响因子：
5.2
通讯作者：
E. Smith;M. Neugebauer;A. Balogh;S. Bame;G. Erdös;R. Forsyth;B. Goldstein;J. Phillips;B. Tsurutani
中科院分区：
文献类型：
--
作者：
E. Smith;M. Neugebauer;A. Balogh;S. Bame;G. Erdös;R. Forsyth;B. Goldstein;J. Phillips;B. Tsurutani
1993年5月，在日心纬度为30° S，距离为4.7 Au的位置，太阳层电流片（HCS）消失。HCS的消失与太阳风的速度保持在560公里/秒以上，以及之前在每次太阳自转中看到的四个相互作用区域之一的消失相吻合。HCS消失的日面纬度是在源面2.5太阳半径处计算出的磁中性片纬度向赤道方向11°，比根据中性片倾斜从一个太阳周期到下一个太阳周期的持续时间廓线所预测的要早半年。
In May, 1993, the heliospheric current sheet (HCS) ceased to be seen by the Ulysses spacecraft at a heliocentric latitude of ∼30° S and distance of 4.7 AU. The disappearance of the HCS coincided with the solar wind speed remaining >560 km/s and with the disappearance of one of four interaction regions previously seen on each solar rotation. The heliographic latitude of the disappearance of the HCS at Ulysses was 11° equatorward of the latitude of the magnetic neutral sheet computed at the source surface at 2.5 solar radii, and it occurred a half year earlier than predicted on the basis of the persistence of the time profile of the neutral sheet tilt from one solar cycle to the next.