排序方式: 共有3条查询结果,搜索用时 15 毫秒
1
1.
By using Hα, He I 10830, EUV and soft X-ray (SXR) data, we examined a filament eruption that occurred on a quiet-sun region near the center of the solar disk on 2006 January 12, which disturbed a sigmoid overlying the filament channel observed by the GOES-12 SXR Imager (SXI), and led to the eruption of the sigmoid. The event was associated with a partial halo coronal mass ejection (CME) observed by the Large Angle and Spectrometric Coronagraphs (LASCO) on board the Solar and Heliospheric Observatory (SOHO), and resulted in the formation of two flare-like ribbons, post-eruption coronal loops, and two transient coronal holes (TCHs), but there were no significantly recorded GOES or Hα flares corresponding to the eruption. The two TCHs were dominated by opposite magnetic polarities and were located on the two ends of the eruptive sigmoid. They showed similar locations and shapes in He Ⅰ 10830, EUV and SXR observations. During the early eruption phase, brightenings first appeared on the locations of the two subsequent TCHs, which could be clearly identified on He Ⅰ 10830, EUV and SXR images. This eruption could be explained by the magnetic flux rope model, and the two TCHs were likely to be the feet of the flux rope. 相似文献
2.
3.
High-resolution Stokes spectral data of Hα,Ca II 8542 ,and Fe I 6302.5 lines for a two-ribbon microflare (TRMF) were simultaneously obtained by the THEMIS telescope on 2002 September 5.We derive the intensity,velocity,and longitudinal magnetic field maps.The hard X-ray emission observed by RHESSI provides evidence of nonthermal particle acceleration in the TRMF.Using Hα and Ca II 8542 line profiles and a non-LTE calculation,we obtain semi-empirical atmospheric models for the two brightest kernels of th... 相似文献
1