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  • 1
    Publication Date: 2019-06-28
    Description: Full disk, He I 10,830 A solar spectroheliograms have been generated using the Haleakala Stokes polarimeter-spectrometer. The spectroheliograms, with spatial resolution of 10 x 16 arcsec and wavelength bandpass of 0.53 A, were developed for the detection of coronal holes, and have been compared with nearly simultaneous H-alpha and Ca K filtergrams. Areas of reduced helium absorption have been noted in the neighborhood of filaments and neutral zones in the longitudinal solar magnetic field. The existence of these helium lanes is discussed in terms of their relationship to H-alpha filament channels or to the coronal cavities which surround prominences.
    Keywords: SOLAR PHYSICS
    Type: Solar Physics; 73; Sept
    Format: text
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