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Observations of sunspot umbral velocity oscillations.Review of sunspot umbral velocity measurements obtained free from any cross talk introduced by photospheric and penumbral scattered light by using lines formed only in the sunspot umbrae and showing no Zeeman effect. The maximum peak-to-peak amplitude of the umbral oscillatory velocity component is found to be of the order of 0.5 km per sec.
Document ID
19730035956
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bhatnagar, A.
Livingston, W. C.
Harvey, J. W.
(Kitt Peak National Observatory Tucson, Ariz., United States)
Date Acquired
August 7, 2013
Publication Date
November 1, 1972
Publication Information
Publication: Solar Physics
Volume: 27
Subject Category
Space Sciences
Accession Number
73A20758
Funding Number(s)
CONTRACT_GRANT: NSF GA-24015
CONTRACT_GRANT: NGL-05-002-071
Distribution Limits
Public
Copyright
Other

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