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Flows around sunspots and poresObservations are reported yielding high-resolution white-light data regarding the flow pattern of penumbral material and granules around sunspots and pores. The data are culled from optical observations near the limit of the telescope modulation transfer function, and correlation tracking is employed to track the motions of penumbral features and granules. Dark fibrils and bright grains in the sunspots' inner penumbra regions move toward the umbra, and the opposite occurs in the outer penumbra. Before pore formation and during the pores existence granular flows are found to converge on the features. The paper also details the evolution of an emerging flux region, and two types of photospheric dark alignments are described in the region of new flux emergence.
Document ID
19920066837
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Wang, Haimin
(NASA Headquarters Washington, DC United States)
Zirin, Harold
(Big Bear Solar Observatory Pasadena, CA, United States)
Date Acquired
August 15, 2013
Publication Date
July 1, 1992
Publication Information
Publication: Solar Physics
Volume: 140
Issue: 1 Ju
ISSN: 0038-0938
Subject Category
Astrophysics
Report/Patent Number
ISSN: 0038-0938
Accession Number
92A49461
Funding Number(s)
CONTRACT_GRANT: NAGW-1972
CONTRACT_GRANT: NAS5-27269
CONTRACT_GRANT: NSF ATM-88-16007
Distribution Limits
Public
Copyright
Other

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