The He I 10,830 A chromosphere and filament associated structures

Details The He I 10,830 A chromosphere and filament associated structures The He I 10,830 A chromosphere and filament associated structures

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...73...59m&link_type=abstract

Solar Physics, vol. 73, Sept. 1981, p. 59-66.

Physics

11

Chromosphere, Coronal Holes, Helium, Solar Corona, Solar Prominences, Absorption Spectra, Astronomical Photography, Calcium, Filtergrams, H Alpha Line, K Lines, Solar Magnetic Field, Solar Spectra

Scientific paper

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.

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