Steady flows in active regions observed with the He I 10830 A line

Details Steady flows in active regions observed with the He I 10830 A line Steady flows in active regions observed with the He I 10830 A line

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985soph...97...35l&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 97, May 1985, p. 35-49.

Physics

11

Chromosphere, Doppler Effect, Magnetic Signatures, Solar Limb, Steady Flow, Sunspots, Astronomical Spectroscopy, Charge Coupled Devices, Line Of Sight, Solar Activity

Scientific paper

The authors show that the He I 10830 Å line gives reliable Doppler shift measurements in the upper chromosphere above active regions. Persistent flow patterns in active regions observed near the solar limb show features previously noted in Dopplergrams using the C IV transition region ultraviolet emission line. Unlike the C IV measurements, however, the He I absorption shows a strong correlation with the line-of-sight velocity images in certain regions of some active regions.

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