The sun's shape and brightness

Details The sun's shape and brightness The sun's shape and brightness

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998natur.392..155k&link_type=abstract

Nature, vol. 392, p. 155

Astronomy and Astrophysics

Astronomy

76

Solar Cycles, Stellar Luminosity, Astronomical Photometry, Astrometry, Charge Coupled Devices, Pixels

Scientific paper

We present satellite data that show that the sun's shape and temperature vary with latitude in an unexpectedly complex way. Although the solar oblateness shows no evidence of varying with the solar cycle, we find a significant hexadecapole shape term which may vary. We also see a variation of about 1.5 K in the surface temperature with latitude. Based on these results, we suggest that sensitive observations of brightness variations be used as a record of the surface 'shadow' of cyclical changes in the solar interior.

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