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Near-Sun and near-Earth manifestations of solar eruptions

机译:太阳喷发的近日和近地表现

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We compare the near-Sun and near-Earth manifestations of solar eruptions that occurred during November 1994 to June 1998. We compared white-light coronal mass ejections, metric type II radio bursts, and extreme ultraviolet wave transients (near the Sun) with interplanetary (IP) signatures such as decameter-hectometric type II bursts, kilometric type II bursts, IP ejecta, and IP shocks. We did a two-way correlation study to (1) look for counterparts of metric type II bursts that occurred close to the central meridian and (2) look for solar counterparts of IP shocks and IP ejecta. We used data from Wind and Solar and Heliospheric Observatory missions along with metric radio burst data from ground-based solar observatories. Analysis shows that (1) most (93%) of the metric type II bursts did not have IP signatures, (2) most (80%) of the IP events (IP ejecta and shocks) did not have metric counterparts, and (3) a significant fraction (26%) of IP shocks were detected in situ without drivers. In all these cases the drivers (the coronal mass ejections) were ejected transverse to the Sun-Earth line, suggesting that the shocks have a much larger extent than the drivers. Shocks originating from both limbs of the Sun arrived at Earth, contradicting earlier claims that shocks from the west limb do not reach Earth. These shocks also had good type II radio burst association. We provide an explanation for the observed relation between metric, decameter-hectometric, and kilometric type II bursts based on the fast mode magnetosonic speed profile in the solar atmosphere. [References: 49]
机译:我们比较了1994年11月至1998年6月发生的太阳喷发的近太阳和近地球表现。我们比较了白光日冕物质抛射,公制II型无线电脉冲和行星际行星际的极端紫外线瞬变(太阳附近)。 (IP)签名,例如,十公尺II类爆发,公里II类爆发,IP喷射和IP冲击。我们进行了双向相关性研究,以(1)寻找在中央子午线附近发生的II型公制爆发的对应物,以及(2)寻找IP冲击和IP喷射的太阳对应物。我们使用了来自风能和太阳能和太阳系天文台任务的数据,以及来自地面太阳能天文台的公制无线电脉冲数据。分析显示(1)大多数(II%)度量标准II型突发类型没有IP签名;(2)大多数(80%)IP事件(IP弹出和冲击)没有度量标准对应的事件;以及(3 )在没有驱动程序的情况下就地检测到很大一部分IP冲击(26%)。在所有这些情况下,驱动器(日冕物质抛射)横向于太阳地球线弹出,这表明冲击的程度比驱动器大得多。来自太阳的两个分支的冲击都到达了地球,这与先前的说法相反,即来自西肢的冲击没有到达地球。这些冲击还具有良好的II型无线电突发关联。我们基于太阳大气中的快速模式磁速分布,提供了对公制,十公尺-公制和千米型II型爆发之间观察到的关系的解释。 [参考:49]

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