Abstract
Analysis of CDS data has shown that transition region blinkers and the chromosphere directly below, are preferentially more redshifted and have larger non-thermal velocities than the normal transition region and chromospheric plasma. The ranges of these enhanced velocities, however, are no larger than the typical spread of Doppler and non-thermal velocities in these regions. An overview of the Doppler and non-thermal velocities of blinkers found with CDS in the quiet Sun and active region are presented. The anticipated range of Doppler velocities of blinkers are 10-15 km s-1 in the quiet-Sun (10-20 km s-1 in active-regions) in the chromosphere (He I) and 25-30 km s -1 in the quiet-Sun (20-40 km s-1 in active-regions) in the transition region (O V). The range of non-thermal velocities of blinkers in both the quiet-Sun and active-regions are estimated to be 15-25 km s -1 in He I and 30-45 km s-1 in O V. There are more blinkers with larger Doppler and non-thermal velocities than would be expected in the whole of the chromosphere and transition region.
| Original language | English |
|---|---|
| Pages | 267-272 |
| Number of pages | 6 |
| Publication status | Published - 1 Dec 2004 |
| Event | Proceedings of the Conference SOHO 13 - Waves, Oscillations and Small-Scale Transient Events in the Solar Atmosphere: A Joint View from SOHO and TRACE - Balearic Islands, Spain Duration: 29 Sept 2003 → 3 Oct 2003 |
Conference
| Conference | Proceedings of the Conference SOHO 13 - Waves, Oscillations and Small-Scale Transient Events in the Solar Atmosphere: A Joint View from SOHO and TRACE |
|---|---|
| Country/Territory | Spain |
| City | Balearic Islands |
| Period | 29/09/03 → 3/10/03 |