Solar line profiles of He I 584 A and He II 304 A

Details Solar line profiles of He I 584 A and He II 304 A Solar line profiles of He I 584 A and He II 304 A

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80..482c&link_type=abstract

Journal of Geophysical Research, vol. 80, Feb. 1, 1975, p. 482-486.

Astronomy and Astrophysics

Astronomy

19

Helium, Line Shape, Luminous Intensity, Solar Spectra, Spectroheliographs, Astronomical Photography, Data Reduction, Grazing, Helium Atoms, Helium Ions, Radiant Flux Density, Spectral Line Width, Spectral Resolution

Scientific paper

A grazing incidence spectrograph launched in a Black Brant rocket August 30, 1973, at White Sands Missile Range obtained high spectral resolution data of the solar radiation between 200 and 700 A. Absolute intensities and profiles of the brighter lines in this spectral region were measured. Results for the He I 584-A and He II 304-A lines are presented. For the He I 584-A line the full width at half intensity is 0.08 A, and the intensity for the solar disk is 1.3 billion photons per sq cm per sec. For the 304-A He II line these values are 0.12 A and 6.3 billion photons per sq cm per sec, respectively.

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