Note on the dark helium points observed in the 10830 Å line.

Details Note on the dark helium points observed in the 10830 Å line. Note on the dark helium points observed in the 10830 Å line.

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989bsold..11r..91p&link_type=abstract

Byulletin Solnechnye Dannye Akademie Nauk USSR, No. 1989/12,11, p. 91 - 95

Computer Science

Solar Network: Spectroheliograms, Solar Network: Helium

Scientific paper

A comparison of the spectroheliograms of a solar region is made. The spectroheliograms have been obtained at an interval of several minutes in the He I 10830 Å, Hα K Ca II lines. It is shown with an accuracy of the order of 2 that the helium network is located at the same place as the chromospheric network in the Hα and K Ca II lines. Large dark helium points coincide well with bright Ca and the He flocculi. The distribution of dark helium points over the solar disk is nearly uniform. An estimation of the upper boundary of the longitudinal magnetic field in dark helium points is equal to 100 E as received from the Fe 5250 Å magnetograms.

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