Crynodeb
Context: Waves offer a unique opportunity to understand and diagnose the
properties of the solar coronal plasma. Aims: Hinode/EIS
observations are analysed to detect wave and oscillatory motions in the
solar corona. Methods: The EIS observations were carried out using
a selection of EUV lines. Hinode/XRT images are taken concurrently. Results: Two examples of oscillations in active regions are presented.
We analysed the evolution of the intensities and Doppler shifts. The
Hinode/XRT images suggest that both events occurred along loop-like
structures. The first event is interpreted as a slow sausage (acoustic)
type wave with a period of 1.2 mHz. The second example is associated
with a transverse, most likely kink type, wave with a period of 3 mHz.
The EUV line ratios were then used to determine the value of the coronal
magnetic field.
Iaith wreiddiol | Saesneg |
---|---|
Tudalennau (o-i) | L49-L52 |
Cyfnodolyn | Astronomy and Astrophysics |
Cyfrol | 489 |
Rhif cyhoeddi | 3 |
Dynodwyr Gwrthrych Digidol (DOIs) | |
Statws | Cyhoeddwyd - 03 Hyd 2008 |