Comparison of magnetic fields in quiescent solar prominences measured by D₃ HeI and Hα lines

Abstract

Magnetic fields were measured by Zeeman splitting of I ±V profiles of D 3 HeI and Hα lines on heights of 3-12 Mm in the Sun's atmosphere. The amplitude values of local strengths in named prominences were found in range from 0 to 1240 G for Hα line and from 0 to 1220 G for D 3 line. Amplitude values of local strengths were determined from splitting of bisectors in central parts of profiles, at intensity level of 0.9. In contrast to active prominences, studied by authors earlier, in quiescent prominences the anticorrelation effect of measured magnetic strengths in helium and hydrogen lines was not found.