Ephemeral regions vs. pseudo ephemeral regions.
Abstract
The authors retain the definition of an ephemeral region as a feature which appears to originate as a compact bipole and grows as a unit in total flux for at least a short time after its birth. In contrast to the recognized patterns of growth and decay of ephemeral regions, various examples of the creation of other temporary bipoles nicknamed "pseudo ephemeral regions" are illustrated. The pseudo ephemeral regions are the consequence of combinations of small scale dynamic processes of the quiet sun including: (1) fragmentation of network magnetic fields, (2) the separation of opposite polarity halves of ephemeral regions as they grow and evolve, and (3) the coalescence of weak network or intra-network magnetic fields. The authors suggest that many X-ray bright points may be related to the pseudo ephemeral regions. They also suggest that vector magnetograms should also reveal distinct differences between real and pseudo ephemeral regions.
- Publication:
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NASA Conference Publication
- Pub Date:
- 1985
- Bibcode:
- 1985NASCP2374..403M
- Keywords:
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- Solar Magnetic Fields:Quiet Sun