在一个非常长的太阳冠状体等离子环束中,30分钟无衰变的扭曲振荡
Sihui Zhong1, Valery M Nakariakov2,3, Yuhu Miao4
1Centre for Fusion, Space and Astrophysics, Physics Department, University of Warwick, Coventry, CV4 7AL, UK.
Scientific reports
|August 10, 2023
概括
科学家们在太阳等离子环中观察到持久的,不衰减的扭曲振荡,为太阳的冠状热神秘提供了线索,并支持太阳耀斑的宽带能源.
科学领域:
- 太阳物理 太阳物理
- 等离子体天体物理学
- 太空物理学 太空物理学
背景情况:
- 太阳的日冕加热困境仍然是太阳物理学的重大挑战.
- 冠状体等离子环中的无衰变曲振荡是能量转移机制的潜在指标.
- 了解这些振荡对于揭开太阳冠状的能量平衡至关重要.
研究的目的:
- 为了研究长期外肢冠状循环中无衰变的扭曲振荡的特征.
- 探索观察到的振荡周期对冠状热机制的影响.
- 利用磁动力学地震学进行全面的等离子体和磁场诊断.
主要方法:
- 观察非常长的非肢体冠状循环,在几个小时内表现出无衰变的扭曲振荡.
- 测量振荡幅度 (0.3-0.5毫米) 和周期 (28-33分钟).
- 差异性排放量分析和背景冠状模型的应用.
主要成果:
- 在冠状循环中检测持续的无衰变的扭曲振荡,其长度为[公式:参见文本]毫米,寿命约为2天.
- 观察到的28-33分钟的振荡周期表明,在巨大的等离子体结构中,可以补偿波缓解的机制.
- 有证据表明,这些振荡的起源非共振,涉及宽带能源而不是光球/染色体泄漏.
结论:
- 无衰变的30分钟周期性扭曲振荡支持太阳冠状的波缓冲补偿机制的有效性.
- 这些发现提供了强有力的证据,证明这些振荡的非共振性质,突出了宽带能源的作用.
- 磁性水力动力学地震学与观测数据相结合,为空间天气模型提供了宝贵的等离子体和磁场诊断.
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