The Nonhomologous Nature of Solar Diameter Variations | Zendy

S. Sofia | Zendy; Sarbani Basu | Zendy; P. Demarque | Zendy; Linghuai Li | Zendy; Gérard Thuillier | Zendy

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The Nonhomologous Nature of Solar Diameter Variations

Author(s) -

S. Sofia,

Sarbani Basu,

P. Demarque,

Linghuai Li,

Gérard Thuillier

Publication year - 2005

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/498068

Subject(s) - variation (astronomy) , turbulence , degree (music) , physics , mode (computer interface) , scale (ratio) , astrophysics , computational physics , materials science , atmospheric sciences , optics , mechanics , quantum mechanics , acoustics , computer science , operating system

We show in this paper that the changes of the solar diameter in response tovariations of large scale magnetic fields and turbulence are not homologous.For the best current model, the variation at the photospheric level is over1000 times larger than the variation at a depth of 5 Mm, which is about thelevel at which f-mode solar oscillations determine diameter variations. Thismodel is supported by observations that indicate larger diameter changes forhigh degree f-modes than for low degree f-modes, since energy of the former areconcentrated at shallower layers than the latter.Comment: 11 pages, 3 figures, aastex style, accepted for publication by ApJ

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