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Spatial correlation of Hα filaments and photospheric velocity

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Abstract

The location of Hα filaments is compared with maps of the photospheric line of sight velocity V ∥and the magnetic field H ∥. It is found that (1) Hα filaments are associated with regions of ¦V ∥¦ ⩽ 300m s−1, (2) always both positive as well as negative velocities are present under Hα structures, (3) stable (long lasting) portion of filaments frequently occur at the position of H ∥= 0 as well as V ∥= 0 lines, (4) this association remains valid for the longitudes less than 50° from central meridian.

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Authors and Affiliations

  1. Observatoire de Paris, Section d'Astrophysique, 92190, Meudon, France

    M. -J. Martres, J. Rayrole & I. Soru-Escaut

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  1. M. -J. Martres
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  2. J. Rayrole
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  3. I. Soru-Escaut
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Martres, M.J., Rayrole, J. & Soru-Escaut, I. Spatial correlation of Hα filaments and photospheric velocity. Sol Phys 46, 137–148 (1976). https://doi.org/10.1007/BF00157560

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  • DOI: https://doi.org/10.1007/BF00157560

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