Observations of the optical spectrum of the dayside magnetospheric cleft aurora |
| |
| Authors: | WA Gault RA Koehler R Link GG Shepherd |
| |
| Institution: | Centre for Research in Experimental Space Science, York University, Downsview, Ontario, Canada M3J 1P3 |
| |
| Abstract: | Optical spectra of the cleft aurora in the region 5000–8500 Å were measured in December, 1977 at Cape Parry, N.W.T. A Michelson interferometer was used at a resolution of 10 cm?1. The auroral features observed were OI (5577, 6300-64, 7774, 8446 Å), OII (7319-30 Å), NI (5200 Å), Hα, O2 atm (1,1), some weak N21P bands and possibly some Meinel bands of N2+. In addition, nightglow emissions of Na and OH were observed. Theoretical predictions of the OI and NI emission rates using the model of Link et al. (1980) fit the observed rates reasonably well if a 40 eV Maxwellian incident electron spectrum is assumed. The predicted rates for OII exceed the observed value by a factor of 4. It is suggested that the ionization cross-section may be over-estimated. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
