The Precise Solar Shape and Its Variability

descriptionPublicationkeyboard_double_arrow_right Article 28 Sep 2012 English Publisher:American Association for the Advancement of Science (AAAS)Journal:Science, volume 337, pages 1,638-1,640 (issn: 0036-8075, eissn: 1095-9203,

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Authors: J R, Kuhn; R, Bush; M, Emilio; I F, Scholl;

doi: 10.1126/science.1223231

pmid: 22903522

The Precise Solar Shape and Its Variability

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Abstract

Our Constant Sun The exact shape of the Sun provides information on its internal structure. Based on data obtained by the Helioseismic and Magnetic Imager aboard NASA's Solar Dynamics Observatory, Kuhn et al. (p. 1638 , published online 16 August; see the Perspective by Gough ) measured the solar shape during a 2-year period in which the Sun evolved from a minimum to a maximum of sunspot activity. Against expectations, the Sun's oblate shape was found to be constant and not to vary with the 11-year solar cycle.

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