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Ephemeral regions versus pseudo ephemeral regionsNew studies of the quiet Sun reveal that ephemeral active regions constitute minority rather than a majority of all the short lived, small scale bipolar features on the Sun. 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 intranetwork magnetic fields. New observations offer the possibility of resolving the discrepancies that have arisen in the association of ephemeral regions with X-ray bright points. Many X-ray bright points may be related to those pseudo ephemeral regions which have begun to exhibit magnetic flux loss.
Document ID
19850021589
Document Type
Conference Paper
Authors
Martin, S. F. (Hale Observatories Pasadena, CA, United States)
Livi, S. H. B. (Univ. Federal do Rio Grande do Sul Peking, United States)
Wang, J. (Academia Sinica Peking, United States)
Shi, Z. (Academia Sinica)
Date Acquired
August 12, 2013
Publication Date
May 1, 1985
Publication Information
Publication: NASA. Marshall Space Flight Center Meas. of Solar Vector Magnetic Fields
Subject Category
SOLAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-255
CONTRACT_GRANT: NSF ATM-82-11002
CONTRACT_GRANT: NGL-05-002-034
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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