论文标题
与辐射冷却相比，声波通过声波加热：ii-修订的模型网格
Chromospheric Heating by Acoustic Waves Compared to Radiative Cooling: II -- Revised Grid of Models
论文作者
论文摘要
声波和磁性波被认为是色层加热的可能药物。我们提出了沉积的声能通量的比较，与安静的阳光的中部染色体中的总体辐射损失和弱块中的整体辐射损失。该比较基于CA II 854.2 nm线中的IBIS仪器获得的一组一致的高分辨率观测值。沉积的声流能量来自在线芯中观察到的多普勒速度和一组1737的非LTE 1D 1D静水半经验模型，这也提供了辐射损失。通过缩放五个初始型号的Val B-F的温度和柱质量来获得模型，从而使合成曲线最适合观察到的曲线。我们发现，沉积在静sun染色体中的声流能量平衡了辐射释放的能量的30-50％。在板块中，在垂直磁场的位置贡献了50-60％，在磁场倾斜超过50度的区域中，它贡献了70-90％。
Acoustic and magnetoacoustic waves are considered to be possible agents of chromospheric heating. We present a comparison of deposited acoustic energy flux with total integrated radiative losses in the middle chromosphere of the quiet Sun and a weak plage. The comparison is based on a consistent set of high-resolution observations acquired by the IBIS instrument in the Ca II 854.2 nm line. The deposited acoustic-flux energy is derived from Doppler velocities observed in the line core and a set of 1737 non-LTE 1D hydrostatic semi-empirical models, which also provide the radiative losses. The models are obtained by scaling the temperature and column mass of five initial models VAL B-F to get the best fit of synthetic to observed profiles. We find that the deposited acoustic-flux energy in the quiet-Sun chromosphere balances 30-50 % of the energy released by radiation. In the plage, it contributes by 50-60 % in locations with vertical magnetic field and 70-90 % in regions where the magnetic field is inclined more than 50 degrees to the solar surface normal.
