STABILITY OF PROMINENCES EXPOSING HELICAL-LIKE PATTERNS

被引：137

作者：

VRSNAK, B ^{[1
]}

RUZDJAK, V ^{[1
]}

ROMPOLT, B ^{[1
]}

机构：

[1] WROCLAW UNIV, ASTRON OBSERV, PL-51622 WROCLAW, POLAND

来源：

SOLAR PHYSICS | 1991年 / 136卷 / 01期

关键词：

D O I：

10.1007/BF00151701

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The internal structure of prominences appearing as twisted tubes was studied. The sample embraced 15 stable and 13 eruptive prominences, exposing patterns which possibly reflect a helical configuration. The equivalent pitch angles (l) of twisted fine structure features were measured. In some cases the evolution of the internal structure was followed and 49 independent measurements of the parameter a were performed in total. The results are presented in the plane relating the parameter l and the normalized prominence height. The eruptive prominences occupy the region characterized by 9 > 50-degrees and h > 0.8d, where h and d are the prominence height and the footpoint half-separation, respectively. All prominences characterized by h < 0.6d or by l < 35-degrees were stable. Such a result is in good agreement with an order of magnitude treatment of the forces acting in a curved magnetic tube, anchored at both ends in the photosphere.

引用

页码：151 / 167

页数：17