Fluorescence lines of MnII in the red spectrum of η Carinae.

Astronomy and Astrophysics – Astrophysics

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Atomic Processes, Line: Identification, Radiation Mechanisms: Non-Thermal, Stars: Individual: {Eta} Car

Scientific paper

Five emission lines in the wavelength region 6122-6132 A in the spectrum of η Carinae are identified as the 4d ^5^D-4f ^5^F multiplet of Mn^44^Sc II. These are the only high-excitation lines of Mn^44^Sc II present in the spectrum. The upper levels of the multiplet are most likely populated through photoexcitation by an accidental coincidence in wavelength between the ultraviolet multiplets UV 15 of Mn^44^Sc II and UV 5 of Si^44^Sc II. Improved laboratory wavelengths for the Mn^44^Sc II lines are presented.

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