Identification of forbidden Fe III in the solar ultraviolet spectrum

Details Identification of forbidden Fe III in the solar ultraviolet spectrum Identification of forbidden Fe III in the solar ultraviolet spectrum

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.324..444j&link_type=abstract

Nature (ISSN 0028-0836), vol. 324, Dec. 4, 1986, p. 444-446.

Other

9

Iron, Solar Spectra, Ultraviolet Spectra, Emission Spectra, Solar Limb

Scientific paper

Solar ultraviolet spectra have been obtained with high spectral and spatial resolution using the Naval Research Laboratory's high-resolution telescope and spectrograph (HRTS) flown on rockets since 1975 and most recently on the Spacelab 2 Shuttle flight. The longest exposures during the first rocket flight of the HRTS showed a number of weak emission lines at the solar limb, in particular between 1,570 and 1,600 Å that could not readily be identified. The authors have now identified the emission lines concerned as forbidden (electric quadrupole and magnetic dipole) transitions in Fe III, the first detection of these particular transitions in any source. They must now be considered potential candidates for previously unidentified lines in other low-density (Ne ⪉ 1010cm-3) astrophysical sources.

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