Intensity enhancement on the wavelength of the HeI 5876 A emission observed at high latitude

Details Intensity enhancement on the wavelength of the HeI 5876 A emission observed at high latitude Intensity enhancement on the wavelength of the HeI 5876 A emission observed at high latitude

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978esasp.135..223h&link_type=abstract

In ESA European Sounding Rocket, Balloon and Related Res., with Emphasis on Expt. at High Latitudes p 223-234 (SEE N79-31637 2

Computer Science

Sound

Augmentation, Emission Spectra, Ground Stations, Helium, Polar Regions, Auroras, Doppler Effect, Graphs (Charts), Iodine, Line Spectra, Solar Wind

Scientific paper

From ground-based spectrometric observation, an emission on the wavelength of HeI 5876 A line is identified during aurora. The emission is slightly Doppler shifted towards the blue side when the direction of observation is above the magnetic horizon. The spectral form of this emission resembles that of an atomic line, not a molecular rotational band. It is likely that this emission is the HeI 5876 A line originating essentially from solar wind alpha-particles. The relative weakness of this emission on the latitude of the polar cleft may be a consequence of the generally low energy of the particle influx in this region.

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