Measurement of the relative intensities of Hezeta -H8 lines lambda 3889 Å in the spectrum of the chromospheric spicules at various heights above the limb.
Abstract
A series of 31 large scale spectra of the spicules near H8-Heζ lines λ 3889 Å has been photographed at different heights (1500-5000 km) with 53-cm coronagraph. The solar image was 121 mm in diameter, dispersion and spatial resolution were respectively 0.647 Å mm−1 and 1-2″. Equivalent widths of both lines have been measured and ratio R = EWHeζ/EWH8 was obtained. Te(h) distribution in the averaged spicule deduced differs from that in the recent spicule model by Beckers (1972): the spicules are colder greatly than it was accepted hitherto (Te ⩽ 10000 K). The electron temperature in the quiescent prominence which occurred in the spectra was also estimated: Te ⩽ 6000 K at h = 4000 and 5000 km.
- Publication:
-
Solar Physics
- Pub Date:
- January 1978
- DOI:
- 10.1007/BF00152634
- Bibcode:
- 1978SoPh...56...71N
- Keywords:
-
- Chromosphere;
- H Lines;
- Helium;
- Solar Spectra;
- Spicules;
- Coronagraphs;
- Electron Density (Concentration);
- Electron Energy;
- Solar Limb;
- Solar Prominences;
- Solar Physics;
- Relative Intensity;
- Electron Temperature;
- Equivalent Width;
- Solar Image;
- Scale Spectrum;
- Electron Temperatures:Solar Prominences;
- Line Profiles:Solar Spicules