Shifts of the Ca II K line in He I 10830 dark points.

Details Shifts of the Ca II K line in He I 10830 dark points. Shifts of the Ca II K line in He I 10830 dark points.

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986soph..107...63h&link_type=abstract

Solar Physics, Volume 107, Issue 1, pp.63-72

Physics

1

Solar Chromosphere:Calcium Lines, Solar Chromosphere:Velocities, Velocities:Solar Chromosphere

Scientific paper

The authors investigate the velocity field of the solar chromosphere at the location of 65 He I 10830 dark points (DP's). They have obtained spectra of such points in the vicinity of the Ca II K line. As a measure of differential chromospheric velocity, they use the shift of the K line center relative to a nearby photospheric Fe I line. They 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, this study is relevant to previous reports of outflows from such bright points.

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