摘要
近年来Ｙｏｈｋｏｈ、ＳＯＨＯ和Ｕｌｙｓｓｅｓ等飞船的上天大大提高了日冕观测的范围和精度。如ＳＯＨＯ上的ＬＡＳＣＯ使日冕可观测范围扩展到１．１～３０Ｒ⊙并有分光能力；Ｕｌｙｓｓｅｓ则可以取得黄道面外各纬度处的太阳风实地观测数据。这些资料为日冕物态研究提供了大量有用信息：Ｙｏｈｋｏｈ的软Ｘ射线观测发现了大尺度冕环重联的证据；ＬＡＳＣＯ与其他空间和地面仪器联测对ＣＭＥ的研究提供了极有价值的诊断信息；Ｕｌｙｓｓｅｓ在不到１ｙｒ的时间内从太阳的一个极绕行至另一个极，所取得的实地太阳风观测资料可用于建立日球三维模型。
Recently the launches of a series of spacecrafts, such as Yohkoh, SOHO, Ulysses, etc,have greatly extended the observable range and improved the data. The LASCO/SOHO is acoronagraph which can be used to observe corona of large angle (1.1~ 30R⊙) with spectrometricability. Ulysses was planed to get in situ measurements of solar wind. Maily useful informationhas been obtained from these instruments. Strong evidence for magnetic reconnection between thelarge scale coronal loops was reported from Yohkoh soft X--ray observations. Joint observationsof the LASCO and some other space or groundbased instruments bring new insight and valuablediagnosis of the study of CME. Ulysses data present in situ measuremellts of both speed andelectron density of solar wind as a function of heliolatitude during its pole-to-pole transit in lessthan one year, which is very useful for modeling a 3-D picture of heliosphere.
出处
《天文学进展》
CSCD
北大核心
1999年第4期299-308,共10页
Progress In Astronomy
关键词
日冕
太阳
日冕物质抛射
航天器
太阳风
sun: corona-space vehicles-sun: coronal mass ejection (CME)--Sun: Solar wind
