Документ взят из кэша поисковой машины. Адрес оригинального документа : http://star.arm.ac.uk/~ambn/abstract253.html Дата изменения: Fri Dec 20 15:50:10 1996 Дата индексирования: Tue Oct 2 00:16:48 2012 Кодировка: Поисковые слова: южная атлантическая аномалия

Nonthermal velocities are presented for spectral lines covering the temperature range 10^4 K - 10^6 K, measured from high spectral resolution data for several solar features observed at the limb by the High Resolution Telescope and Spectrograph (HRTS), including a coronal hole, quiescent regions' and several small scale active regions. These results are compared with predictions based on acoustic waves and heating via Alfven waves. It is likely that more than one mechanism is operating simultaneously, in particular, resonant Alfven wave heating, which is very sensitive to background plasma motions.