Doppler oscillations in hot coronal loops

被引:0
|
作者
Curdt, W [1 ]
Wang, TJ [1 ]
Innes, DE [1 ]
Solanki, SK [1 ]
Dammasch, IE [1 ]
Kliem, B [1 ]
Ofman, L [1 ]
机构
[1] Max Planck Inst Aeron, D-37191 Katlenburg Lindau, Germany
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中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Recently, a new kind of damped oscillations of hot coronal loops was revealed by the Solar Ultraviolet Measurements of Emitted Radiation (SUMER) spectrometer on SOHO. Such events seem to be a common feature observed in active region loops, seen very often when these lines brighten. The oscillations always have an impulsive trigger and are strongly damped while they cool down. However, in lines formed at coronal temperatures of approximate to2 MK never any signature of these oscillations has been observed. In this study, we present the main properties of Doppler oscillations derived from a statistical study of 17 flare-like events, and a comparison with TRACE transverse loop oscillations. We also discuss the oscillation modes and their damping mechanism.
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页码:581 / 584
页数:4
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