Using high-dispersion, high-quality spectra of HD 30085 obtained with the echelle spectrograph SOPHIE at l'Observatoire de Haute Provence, we show that this star contains strong lines of the s-process elements Sr II, Y II and Zr II. Line syntheses of the lines yield large overabundances of Sr, Y, Zr which are characteristic of HgMn stars. The Sr-Y-Zr triad of abundances is inverted in HD 30085 compared to that in our solar system. The violation of the odd-even rule suggests that physical processes such as radiative diffusion, chemical fractionation and others must be at work in the atmosphere of HD 30085, and that the atmosphere is stable enough to sustain them.
- SF2A-2015: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics
- Pub Date:
- December 2015
- stars: individual;
- stars: Chemically Peculiar;
- Astrophysics - Solar and Stellar Astrophysics
- 4 pages, SF2A conference proceeding