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arXiv 1012.4655astro-ph.SRphysics.plasm-ph
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等离子体平板模型中电磁波吸收对太阳色球加热

Heating of solar chromosphere by electromagnetic wave absorption in a plasma slab model

D. Tsiklauri, R. Pechhacker

摘要:

在等离子体平板模型的框架下,研究了太阳色球网间区域通过吸收光球黑体辐射产生的电磁波加热的问题。吸收由电子-中性碰撞提供,其中电子在EM波场中振荡并且电子-中性碰撞阻尼EM波。由于等离子体微湍流的碰撞截面的不确定性,它示出,对于合理的物理参数,在色球层中的电磁波的吸收所产生的加热通量之间的$20 - 45$ %的色球层辐射损失通量的要求。它还建立了碰撞截面,$5 \times 10^{-18}$ m $^{2}$,产生1990 W m $^{-2}$的最大热通量有一个最佳值。

英文摘要:

The heating of solar chromospheric inter-network regions by means of the absorption of electromagnetic (EM) waves that originate from the photospheric blackbody radiation is studied in the framework of a plasma slab model. The absorption is provided by the electron-neutral collisions in which electrons oscillate in the EM wave field and electron-neutral collisions damp the EM wave. Given the uncertain nature of the collision cross-section due to the plasma micro-turbulence, it is shown that for plausible physical parameters, the heating flux produced by the absorption of EM waves in the chromosphere is between $20 - 45$ % of the chromospheric radiative loss flux requirement. It is also established that there is an optimal value for the collision cross-section, $5 \times 10^{-18}$ m$^{2}$, that produces the maximal heating flux of 1990 W m$^{-2}$.

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