Solar Physics

, Volume 107, Issue 1, pp 63–72 | Cite as

Shifts of the Caii K line in Hei 10830 dark points

  • Rush D. Holt
  • D. J. Mullan


We investigate the velocity field of the solar chromosphere at the location of 65 He i 10830 dark points (DP's). We have obtained spectra of such points in the vicinity of the Ca II K line. As a measure of differential chromospheric velocity, we use the shift of the K line center relative to a nearby photospheric Fe i line. We find that in He i DP's, the distribution of K line shifts is skewed towards the blue: the blueward skewing is more pronounced in He i DP's located in coronal holes. To the extent that He i DP's are proxies of coronal bright points, our study is relevant to previous reports of outflows from such bright points.


Velocity Field Line Center Coronal Hole Bright Point Line Shift 
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Copyright information

© D. Reidel Publishing Company 1986

Authors and Affiliations

  • Rush D. Holt
    • 1
  • D. J. Mullan
    • 2
  1. 1.Physics DepartmentSwarthmore CollegeSwarthmoreU.S.A.
  2. 2.Bartol Research Foundation of the Franklin Institute, University of DelawareNewarkU.S.A.

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