Issue |
A&A
Volume 382, Number 1, JanuaryIV 2002
|
|
---|---|---|
Page(s) | 319 - 327 | |
Section | Planets and planetary systems | |
DOI | https://doi.org/10.1051/0004-6361:20011610 | |
Published online | 15 January 2002 |
Temporal evolution of different temperature plasma during explosive events
Armagh Observatory, College Hill, Armagh BT61 9DG, N. Ireland
Corresponding author: M. S. Madjarska, madj@star.arm.ac.uk
Received:
18
July
2001
Accepted:
9
November
2001
High cadence observations (10 s exposure time) obtained with the SUMER spectrometer on-board SoHO in the Ly 6 (20 000 K) and S vi (200 000 K) lines reveal new insight on the nature of explosive events. A time delay in the response of the S vi line with respect to the Ly 6 line has been observed, with the Ly 6 line responding with about 20–40 s earlier. A temporal series obtained with 30 s exposure time and covering the entire Lyman series plus O i, C ii and S vi (temperature range from 15 000 to 200 000 K) has also been explored showing the response of all these lines during transient phenomena. New common features linking explosive events and blinkers were found. During explosive events, the central intensity increases between 1.6 and 2.0 times the pre-event value while the same range of intensity increase was already reported during blinker phenomena. On the other hand the maximum intensity increase in Ly 6 was only 13%.
Key words: Sun: activity / Sun: atmosphere / Sun: magnetic field / Sun: UV radiation
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.