New Identifications of Mn VI and Fe VII Vacuum Ultraviolet Lines

Details New Identifications of Mn VI and Fe VII Vacuum Ultraviolet Lines New Identifications of Mn VI and Fe VII Vacuum Ultraviolet Lines

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apjs..148..567e&link_type=abstract

The Astrophysical Journal Supplement Series, Volume 148, Issue 2, pp. 567-574.

Astronomy and Astrophysics

Astronomy

8

Atomic Data, Line: Identification, Methods: Laboratory, Sun: Uv Radiation, Ultraviolet: General

Scientific paper

The Solar Ultraviolet Measurements of Emitted Radiation (SUMER) spectrometer aboard the Solar and Heliospheric Observatory (SOHO) recorded a large number of spectra in the 500-1600 Å region. Although many of the detected lines have already been identified, the origins of a substantial fraction of the lines remain unknown. In this paper we report on a study of Mn VI and Fe VII in laboratory-generated vacuum spark spectra. Some of the Fe VII identified lines belonging to transitions of the type 3d4s-3d4p and 3d4p-3d4d were also observed in SUMER quiet-Sun and sunspot spectra. Because of the much lower manganese abundance in the solar atmosphere, none of the Mn VI lines were observed in the SUMER spectra.

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