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A Correlation Between Changes in Solar Luminosity and Differential Radius MeasurementsSolar luminosity variations occurring during solar cycle 21 can be attributed in large part to the presence of sunspots and faculae. Nevertheless, there remains a residual portion of the luminosity variation distinctly unaccounted for by these phenomena of solar activity. At the Santa Catalina Laboratory for Experimental Relativity by Astrometry (SCLERA), observations of the solar limb are capable of detecting changes in the solar limb darkening function by monitoring a quantity known as the differential radius. These observations are utilized in such a way that the effects of solar activity are minimized in order to reveal the more fundamental structure of the photosphere. The results of observations made during solar cycle 21 at various solar latitudes indicate that a measurable change did occur in the global photospheric limb darkening function. It is proposed that the residual luminosity change is associated in part with this change in limb darkening.
Document ID
19910003153
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kroll, R. J. (Arizona Univ. Tucson., United States)
Hill, H. A. (Arizona Univ. Tucson., United States)
Beardsley, B. J. (Photometrics, Inc., Tucson AZ., United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1990
Publication Information
Publication: NASA, Goddard Space Flight Center, Climate Impact of Solar Variability
Subject Category
Solar Physics
Accession Number
91N12466
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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