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Solar rotation from a number of fraunhofer lines

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Abstract

Solar differential rotation for 1982–83 obtained at the double pass spectrograph of the McMath telescope at Kitt Peak, are presented for lines of Fe, Mg, Na, K, Si, and O in the wavelength interval λλ3820–10827. The results are analyzed by representations in Legendre polynominals and a power series. The differential rotation is very close to the result obtained by Howard and Harvey in 1966–68 at Mt. Wilson but with a slightly greater amplititude. We find a mean equatorial rate of rotation of 1.977 km s-1. Day to day variations are observed in the equatorial zone; a stable rate of rotation is observed outside of the sunspot zone.

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Authors and Affiliations

  1. Kitt Peak National Observatory, P.O. Box 26732, 85726-6732, Tucson, AZ, U.S.A.

    A. Keith Pierce

  2. Edinboro University of Pennsylvania, Edinboro, Pennsylvania, U.S.A.

    James C. Lopresto

Authors
  1. A. Keith Pierce
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  2. James C. Lopresto
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Operated by the Association of Universities for Research in Astronomy, Inc., under contract with the National Science Foundation.

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Pierce, A.K., Lopresto, J.C. Solar rotation from a number of fraunhofer lines. Sol Phys 93, 155–170 (1984). https://doi.org/10.1007/BF00156660

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  • DOI: https://doi.org/10.1007/BF00156660

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