New insight into the blinker phenomenon and the dynamics of the solar transition region

Details New insight into the blinker phenomenon and the dynamics of the solar transition region New insight into the blinker phenomenon and the dynamics of the solar transition region

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...418l...9d&link_type=abstract

Astronomy and Astrophysics, v.418, p.L9-L12 (2004)

Astronomy and Astrophysics

Astrophysics

7

Sun: Atmosphere, Transition Region, Evolution, Magnetic Fields, Uv Radiation

Scientific paper

We present, for the first time, blinker phenomena being associated with brightenings in pre-existing coronal loops registered by the Extreme-ultraviolet Imaging Telescope (EIT) in Fe XII 195 Å. The brightenings occur during the emergence of new magnetic flux as registered by the Big Bear Solar Observatory (BBSO) magnetograph. The blinkers were identified using simultaneous observations obtained with the Coronal Diagnostic Spectrometer (CDS) and Solar Ultraviolet Measurements of Emitted Radiation (SUMER) spectrograph. In light of the new observational results, we present one possible theoretical interpretation of the blinker phenomenon. We suggest that the blinker activity we observe is triggered by interchange reconnection, serving to provide topological connectivity between newly emerging flux and pre-existing flux. The EIT images show the existence of loop structures prior to the onset of the blinker activity. Based on the available spatial resolution the blinker occurs within, or nearby, an existing coronal loop. The temperature interfaces created in the reconnection process between the cool plasma of the newly emerging loop and the hot plasma of the existing loop are what we suggest to causes the observed activity seen in both the SUMER and CDS data. As the temperature interfaces propagate with the characteristic speed of a conduction front, they heat up the cool chromospheric plasma to coronal temperatures, an increasing volume of which brightens at transition region temperatures. We believe this new interpretation gives further qualitative understanding about the evolution of newly emerging flux on the Sun. This also provides new insight into the dynamic nature of the solar transition region.

Affiliated with

Also associated with

No associations

Rating

New insight into the blinker phenomenon and the dynamics of 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 New insight into the blinker phenomenon and the dynamics of the solar transition region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New insight into the blinker phenomenon and the dynamics of the solar transition region will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1385904