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Variations of the asymmetry of disk-integrated solar line profiles

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Abstract

Mean line bisector positions were found for the neutral iron line at γ 5250.2 using disk-integrated sunlight. After correction for the apparent time variation of the instrumental profile, it was found that the mean bisector position was constant during the period from May 1982 to February 1983.

The correlation between the total magnetic flux as measured at Mount Wilson and the line asymmetry results of Livingston is not high. In particular, the magnetic flux dropped in 1982, suggesting a large line asymmetry that was not observed. However, the correlation between the 30-day average of the mean magnetic field and Livingston's results is quite high (-0.95), suggesting that the asymmetry of the disk-integrated line profile is related to the old plage regions rather than to the active regions.

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Authors and Affiliations

  1. Mount Wilson and Las Campanas Observatories, Carnegie Institution of Washington, 91101, Pasadena, CA, USA

    David H. Bruning

  2. Institute for Astronomy, University of Hawaii, 96822, Honolulu, HI, USA

    Barry LaBonte

Authors
  1. David H. Bruning
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  2. Barry LaBonte
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Now at the Institute for Astronomy, University of Hawaii, Honolulu, HI 96822, U.S.A.

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Bruning, D.H., LaBonte, B. Variations of the asymmetry of disk-integrated solar line profiles. Sol Phys 97, 1–7 (1985). https://doi.org/10.1007/BF00152974

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  • DOI: https://doi.org/10.1007/BF00152974

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