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High-resolution sunspot observationsA six-hour sequence of observations of the sunspot BB 1680, NOAA 5612 obtained with the 65-cm vacuum reflector on August 2, 1989, is presented. The inflow of penumbral material to the umbra was found to be limited to the inner half of the penumbra. The outer half of the penumbra shows the Evershed effect outward flow extending beyond the penumbra.
Document ID
19910063061
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1016/0273-1177(91)90382-T
Authors
Zirin, H. (California Inst. of Tech. Pasadena, CA, United States)
Wang, H. (Big Bear Solar Observatory Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1991
Publication Information
Publication: of the COSPAR 28th Plenary Meeting, The Hague, Netherlands, June 25-July 6, 1990. A91-47654 20-92) Advances in Space Research
ISSN: 0273-1177
Subject Category
Solar Physics
Report/Patent Number
ISSN: 0273-1177
Accession Number
91A47684
Funding Number(s)
CONTRACT_GRANT: NSF ATM-88-16007
CONTRACT_GRANT: NAGW-1972
Distribution Limits
Public
Copyright
Other

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