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Stellar Irradiance Variations

Published online by Cambridge University Press:  13 May 2016

R. R. Radick
R. R. Radick*
Affiliation:
Air Force Research Laboratory, National Solar Observatory, Sunspot, New Mexico 88349

Abstract

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The variability of several dozen stars similar to the Sun in mass, age, and average activity has been monitored regularly in chromospheric Ca II HK emission for over three decades, and photometrically for over fifteen years. Larger samples have been observed less comprehensively. Analogous solar time series exist. A comparison of solar variability with its stellar analogs indicates that the Sun's current behavior is not unusual among sunlike stars. Both solar models and stellar measurements suggest that a true luminosity variation underlies the cyclic total irradiance changes observed on the Sun.

Type
Session I: Global Structure and Evolution of the Solar Interior
Information
Symposium - International Astronomical Union , Volume 203: Recent Insights into the Physics of the Sun and Heliosphere: Highlights from Soho and Other Space Missions , 2001 , pp. 78 - 85
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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