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Activity in the quiet Sun

I. Observations of macrospicules in Hα and D3

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Abstract

Macrospicules have been observed in Hα and He i D3, on the disk and above the limb. In 1975, a rate of 1400 (A ⊙day)−1 is inferred, and the ratio of equatorial to polar rates ≲ 2. D3 intensities are a few × 10−3 of the disk center, and do not decrease in coronal holes. The ratio of Hα to D3 intensities is ≈ 10. The integral number of macrospicules with D3 intensity ≥I 0 is proportional to I 0 −1.

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Authors and Affiliations

  1. Big Bear Solar Observatory, Hale Observatories, Carnegie Institution of Washington, California Institute of Technology, 91101, Pasadena, Calif., U.S.A.

    Barry J. Labonte

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  1. Barry J. Labonte
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Labonte, B.J. Activity in the quiet Sun. Sol Phys 61, 283–296 (1979). https://doi.org/10.1007/BF00150413

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  • DOI: https://doi.org/10.1007/BF00150413

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