Magnetic topology of blinkers

S. Subramanian*, M. S. Madjarska, R. C. Maclean, J. G. Doyle, D. Bewsher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Context. Co-spatial and co-temporal spectroscopic, imaging and magnetogram data enable us to better understand various solar transient phenomena. Here, we study brightening events in the transition region of the quiet Sun, also called "blinkers".

Aims. We aim to investigate the physical mechanism responsible for blinkers.

Methods. An automated blinker identification procedure (BLIP) is used to identify blinker events in SoHO/CDS data. The 3D magnetic topology of the magnetic field in the blinker region is reconstructed based on SoHO/MDI magnetogram data.

Results. During 3 h of SoHO/CDS observations on 2006 January 18, 66 blinkers were identified in the O V 629 angstrom emission line. Out of them, a group comprising of 16 events were modelled here. They were found to be associated with the emergence of magnetic flux which gave rise to the appearance of, and multiple magnetic reconnection events across, an upper atmosphere (coronal) magnetic null point, along with a loop structure as observed with TRACE.

Conclusions. This blinker group results from the release of energy that was accumulated during flux emergence, although whether all blinkers follow the same formation scenario requires further investigation using additional multi-instrument/multi-mission studies.

Original languageEnglish
Pages (from-to)323-329
Number of pages7
JournalAstronomy & Astrophysics
Volume488
Issue number1
DOIs
Publication statusPublished - Sept 2008

Keywords

  • Sun : activity
  • Sun : UV radiation
  • Sun : transition region
  • Sun : atmosphere
  • Sun : corona
  • Sun : magnetic fields
  • TRANSITION-REGION BLINKERS
  • EXPLOSIVE EVENTS
  • QUIET-SUN
  • SOLAR
  • BRIGHTENINGS
  • EIT
  • DYNAMICS
  • TRACKING
  • POINTS
  • FIELDS

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