Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007mnras.374...63p&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 374, Issue 1, pp. 63-71.
Astronomy and Astrophysics
Astronomy
2
Atomic Data, Atomic Processes, Line: Identification, Stars: Agb And Post-Agb, Stars: Chemically Peculiar
Scientific paper
Using three independent theoretical approaches (CA, HFR + CP, AUTOSTRUCTURE), oscillator strengths have been calculated for a set of TcII transitions of astrophysical interest and the reliability of their absolute scale has been assessed. The examination of the spectra emitted by some Ap stars has allowed the identification of TcII transitions in HD 125248. This TcII detection should however await confirmation from spectral synthesis relying on dedicated model atmospheres. New partition functions are also provided for TcI, TcII and TcIII for temperatures ranging between 4000 and 13000 K.
Biémont É.
Jorissen Alain
Palmeri Patrick
Quinet Pascal
Van Eck Sophie
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