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Shifts of the CaiiK line in Hei10830 dark points

✍ Scribed by Rush D. Holt; D. J. Mullan

Publisher
Springer
Year
1986
Tongue
English
Weight
551 KB
Volume
107
Category
Article
ISSN
0038-0938

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✦ Synopsis

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 CaII 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.

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