Comparison of Transient Network Brightenings and Explosive Events in the Solar Transition Region

Details Comparison of Transient Network Brightenings and Explosive Events in the Solar Transition Region Comparison of Transient Network Brightenings and Explosive Events in the Solar Transition Region

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...528l.119c&link_type=abstract

The Astrophysical Journal, Volume 528, Issue 2, pp. L119-L122.

Astronomy and Astrophysics

Astronomy

40

Magnetohydrodynamics: Mhd, Sun: Activity, Sun: Transition Region, Sun: Uv Radiation

Scientific paper

The relation between transient network brightenings, known as blinkers, and explosive events is examined based on coordinated quiet Sun observations in the transition region line O V λ630 recorded by the Coronal Diagnostic Spectrometer (CDS), in the transition region line Si IV λ1402 recorded by the Solar Ultraviolet Measurements of Emitted Radiation (SUMER) instrument, and in photospheric magnetograms taken by the Big Bear Solar Observatory videomagnetograph. From these observations, we find that (1) explosive events, which are traditionally defined as features with very broad UV line profiles, tend to keep away from the centers of network brightenings and are mostly located at the edges of such brightenings, (2) CDS blinkers consist of many small-scale, short-lived SUMER ``unit brightening events'' with a size of a few arcseconds and a lifetime of a few minutes, and most importantly (3) each SUMER unit brightening event is characterized by a UV line profile that is not as broad as those of explosive events, but still has significantly enhanced wings. Our results imply that, like explosive events, individual unit brightening events involve high velocities, and, hence, blinkers may have the same physical origin as explosive events. It is likely that transient network brightenings and explosive events are both due to magnetic reconnection-but with different magnetic geometries.

Affiliated with

Also associated with

No associations

Rating

Comparison of Transient Network Brightenings and Explosive Events in the Solar Transition Region does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Comparison of Transient Network Brightenings and Explosive Events in the Solar Transition Region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparison of Transient Network Brightenings and Explosive Events in the Solar Transition Region will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1253231