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Solar Rotation During the Period 1847 – 1849

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Abstract

Solar rotation rate has been measured using the sunspot positions recorded by W.C. Bond during the period 1847 – 1849 at the Harvard College Observatory. From the drawings carried out by Bond we have selected the sunspots and groups of sunspots with more reliable positions presented in three or more drawings on successive days. We have calculated from the positions of the selected sunspots (41 in total) a synodic rotation rate of ω=[(12.92±0.08)−(1.5±1.0)sin 2 φ] degrees/day, where φ is the heliographic latitude. This rate, although slightly lower, is similar to the actual solar rotation rate, confirming no important changes in the solar rotation during the last 160 years.

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Authors and Affiliations

  1. Departamento de Física Aplicada, Escuela de Ingenierías Industriales, Universidad de Extremadura, Avda. de Elvas s/n, 06071, Badajoz, Spain

    F. Sánchez-Bajo

  2. Departamento de Física Aplicada, Escuela Politécnica, Universidad de Extremadura, Avda. de la Universidad s/n, 10071, Cáceres, Spain

    J. M. Vaquero

  3. Departamento de Física, Facultad de Ciencias, Universidad de Extremadura, Avda. de Elvas s/n, 06071, Badajoz, Spain

    M. C. Gallego

Authors
  1. F. Sánchez-Bajo
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  2. J. M. Vaquero
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  3. M. C. Gallego
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Corresponding author

Correspondence to J. M. Vaquero.

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Sánchez-Bajo, F., Vaquero, J.M. & Gallego, M.C. Solar Rotation During the Period 1847 – 1849. Sol Phys 261, 1–9 (2010). https://doi.org/10.1007/s11207-009-9469-8

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  • DOI: https://doi.org/10.1007/s11207-009-9469-8

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