期刊
ASTROPHYSICAL JOURNAL
卷 784, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/784/1/50
关键词
Sun: corona; Sun: faculae, plages; Sun: filaments, prominences
资金
- Chinese foundations [2011CB811402]
- NSFC [11025314, 10933003, 10673004]
- STFC [ST/K000977/1, PP/D002907/1, ST/H000429/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/D002907/1, ST/K000977/1, ST/H000429/1] Funding Source: researchfish
- UK Space Agency [ST/J001732/1] Funding Source: researchfish
The dynamics of a filament channel are observed with imaging and spectroscopic telescopes before and during the filament eruption on 2011 January 29. The extreme ultraviolet (EUV) spectral observations reveal that there are no EUV counterparts of the Ha counter-streamings in the filament channel, implying that the ubiquitous Ha counter-streamings found by previous research are mainly due to longitudinal oscillations of filament threads, which are not in phase between each other. However, there exist larger-scale patchy counter-streamings in EUV along the filament channel from one polarity to the other, implying that there is another component of unidirectional flow (in the range of +/- 10 km s(-1)) inside each filament thread in addition to the implied longitudinal oscillation. Our results suggest that the flow direction of the larger-scale patchy counter-streaming plasma in the EUV is related to the intensity of the plage or active network, with the upflows being located at brighter areas of the plage and downflows at the weaker areas. We propose a new method to determine the chirality of an erupting filament on the basis of the skewness of the conjugate filament drainage sites. This method suggests that the right-skewed drainage corresponds to sinistral chirality, whereas the left-skewed drainage corresponds to dextral chirality.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据