Long-term solar brightness changes estimated from a survey of sun-like stars

Details Long-term solar brightness changes estimated from a survey of sun-like stars Long-term solar brightness changes estimated from a survey of sun-like stars

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.360..653l&link_type=abstract

Nature (ISSN 0028-0836), vol. 360, no. 6405, p. 653-655.

Computer Science

44

Brightness Distribution, Solar Activity, Solar Cycles, Stellar Luminosity, Long Term Effects, Solar Maximum Mission

Scientific paper

A compilation of eight years of observations of 33 sunlike stars is presented and year-to-year brightness changes are reported that substantially exceed the analogous solar fluctuations. Chromospheric magnetic activity in these stars is measured and found to correlate with the brightness variations. During 1980-88, solar chromospheric variability was comparable to that observed in the stellar survey, but solar brightness variations were only one-quarter as large. This suggests that the sun is in an unusually steady phase compared to similar stars, which means that reconstructing the past historical brightness record may be more risky than has been generally thought.

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