Shifts of the Caii K line in Hei 10830 dark points |
| |
| Authors: | Rush D Holt D J Mullan |
| |
| Institution: | (1) Physics Department, Swarthmore College, 19081 Swarthmore, PA, U.S.A.;(2) Bartol Research Foundation of the Franklin Institute, University of Delaware, 19716 Newark, DE, U.S.A. |
| |
| Abstract: | 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. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
