Bayesian evidence for two slow-wave damping models in hot coronal loops
Bayesian evidence for two slow-wave damping models in hot coronal loops
复制标题
热日冕环路中两种慢波阻尼模型的贝叶斯证据
DOI：
10.1051/0004-6361/202346834
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发表时间：
2023
影响因子：
6.5
通讯作者：
Arregui I
中科院分区：
文献类型：
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作者：
Arregui I
我们计算了支持两种模型的证据，一种仅基于场排列的热传导，另一种也包括热不平衡，以解释热冕环中慢磁声波的衰减。我们的分析是基于对两个阻尼模型的边际似然和贝叶斯因子的计算。我们量化了它们的优点，以解释慢模式周期和衰减时间之间的明显关系，这是用一组热冕环中的SOHO/SUMER测量的。结果表明，有证据表明，在大多数样本中存在热不平衡的情况下，有证据支持该模型，只有一小部分回路的热传导更合理。如果由于宿主活动区的环路和/或光球层动力学的不同，两种不同的慢波衰减机制的明显可能性可能有助于揭示日冕加热机制。
We computed the evidence in favour of two models, one based on field-aligned thermal conduction alone and another that includes thermal misbalance as well, to explain the damping of slow magneto-acoustic waves in hot coronal loops. Our analysis is based on the computation of the marginal likelihood and the Bayes factor for the two damping models. We quantified their merit to explain the apparent relationship between slow mode periods and damping times, measured with SOHO/SUMER in a set of hot coronal loops. The results indicate evidence in favour of the model with thermal misbalance in the majority of the sample, with a small population of loops for which thermal conduction alone is more plausible. The apparent possibility of two different regimes of slow-wave damping, if due to differences between the loops of host active regions and/or the photospheric dynamics, may help to reveal the coronal heating mechanism.