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Estimation of Key Sunquake Parameters through Hydrodynamic Modeling and Cross-correlation Analysis
The Astrophysical Journal ( IF 4.9 ) Pub Date : 2020-05-26 , DOI: 10.3847/1538-4357/ab88ae
John T. Stefan 1 , Alexander G. Kosovichev 1, 2
Affiliation  

Sunquakes are one of the more distinct secondary phenomena related to solar flares, where energy deposition in the lower layers of the Sun's atmosphere excites acoustic waves easily visible in Helioseismic and Magnetic Imager (HMI) dopplergrams. We explore two possible sources of sunquakes in the context of the electron beam hypothesis: an instantaneous transfer of momentum and a gradual applied force due to flare eruption. We model the sunquake excitation and compare with five observed sunquake events using a cross-correlation analysis. We find that at least half the events studied are consistent with the electron beam hypothesis and estimate the energy required to excite the sunquakes to be within the range determined by previous studies.

中文翻译:

通过水动力建模和互相关分析估计关键的地震参数

太阳地震是与太阳耀斑相关的更明显的次生现象之一,太阳大气下层的能量沉积激发了在日震和磁成像仪 (HMI) 多普勒图上很容易看到的声波。我们在电子束假设的背景下探索了两种可能的太阳地震来源:动量的瞬时转移和由于耀斑爆发而逐渐施加的力。我们对太阳地震激发进行建模,并使用互相关分析与五个观测到的太阳地震事件进行比较。我们发现至少有一半研究的事件与电子束假设一致,并且估计激发太阳地震所需的能量在先前研究确定的范围内。
更新日期:2020-05-26
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