Engineering topics
Publications and source records attributed to Harvey, K. L..
Observations are shown to indicate that ephemeral regions are frequently generated both near large active centers and in extensive quiet areas of the sun. The latitude distribution of ephemeral regions appears to be much wider than that of sunspots and major active centers. Their frequency of occurrence does not appear to follow the sunspot cycle.
We report observations of helium D3 emission in the solar flare of Feb. 11, 1970, made at the Lockheed Solar Observatory. The morphological relationship between the D3 and H alpha emission is explored, and a photometric reduction technique is applied to the filtergrams to determine peak intensity of the D3 emission relative to the local quiet sun continuum.
Work proceeded simultaneously in four different areas of solar research. These were: (1) assembly and testing of the components of a multiple-slit H alpha spectrograph, (2) simultaneous observations of the wings of the H alpha line with a newly modified filter, (3) analysis of H alpha high resolution observations in conjunction with magnetic field observations obtained at Kitt Peak, and (4) theoretical analysis of the D3 line HeI.