JpGU-AGU Joint Meeting 2020

講演情報

[E] 口頭発表

セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境

[P-EM14] Frontiers in solar physics

コンビーナ:今田 晋亮(名古屋大学宇宙地球環境研究所)、Alphonse Sterling(NASA/MSFC)、横山 央明(東京大学大学院理学系研究科)、清水 敏文(宇宙航空研究開発機構宇宙科学研究所)

[PEM14-10] Numerical study of fast and slow wave heating of the magnetic chromosphere

*王 怡康1横山 央明1飯島 陽久2 (1.東京大学、2.名古屋大学)

キーワード:太陽、彩層、MHD波動

The problem how to heat the solar chromosphere is still under debate especially in the magnetic chromosphere. MHD waves are considered as important energy transporter and make contribution to chromospheric heating. Previous researches usually discuss propagation of MHD waves in the chromosphere with great detail but the setting of flux tube and wave generation is artificial. There are also studies by realistic simulations but they are used for comparison with observations without discussing detail physical processes. In our study. by using the result of a two-dimensional realistic MHD simulation, we identify shock waves and separate fast and slow mode waves. We further estimate the heating rate by them. We find that fast wave heating rate is larger than slow wave heating rate in the chromosphere. In addition, the wave heating rate is consistent with radiative cooling rate in classic atmospheric empirical model.