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SOHO OBSERVATIONS OF POLAR CORONAL JETS OVER THE LAST SOLAR CYCLE

机译：在最后一次太阳周期内对极冠状射流的SOHO观测

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The polar coronal jets were first observed by SOHO instruments (EIT, LASCO, UVCS) during the last solar minimum, in 1996. They were small, fast coronal eruptions originating from the fiaring UV bright points within large polar coronal holes. Data analysis and modeling provided estimates of jet plasma conditions, dynamics, evolution of the electron temperature and heating rate. At solar maximum the polar holes disappeared together with the polar jets. However, as the Sun's activity was decreasing, the polar holes again became permanent structures. A special SOHO Joint Observing Program (JOP 155) was designed with the aim to study the origin and dynamics of the jets throughout the solar cycle. It involves several SOHO instruments (EIT, CDS, UVCS, LASCO) and TRACE. The coordinated observations have been carried out since April 2002. They enabled to identify counterparts of the 1996-1998 solar minimum jets. We present SOHO observations of the polar coronal jets ranging from the last solar minimum at 1996 until present. We discuss major results of data analysis and their implication for the jet models.
机译：极日冕射流是在1996年最后一个太阳极小时前由SOHO仪器（EIT，LASCO，UVCS）首次观测到的。它们是小的，快速的日冕爆发，起源于大型极日冕孔中不断增加的紫外线亮点。数据分析和建模提供了喷射等离子体条件，动力学，电子温度演变和加热速率的估计值。在太阳最大值时，极孔和极射流一起消失了。但是，随着太阳活动的减少，极孔又变成了永久结构。设计了一个特殊的SOHO联合观测计划（JOP 155），旨在研究整个太阳周期中射流的起源和动力学。它涉及几种SOHO仪器（EIT，CDS，UVCS，LASCO）和TRACE。自2002年4月以来，已经进行了协调的观测。它们能够确定1996-1998年太阳最低射流的对应部分。我们介绍了从1996年最后一次太阳最低观测到现在的极地日冕射流的SOHO观测结果。我们讨论了数据分析的主要结果及其对喷气模型的影响。

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