Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974ap%26ss..29..343e&link_type=abstract
Astrophysics and Space Science, Volume 29, Issue 2, pp.343-378
Astronomy and Astrophysics
Astrophysics
1
Scientific paper
The spectrum of the metallic-line and magnetic star HD 153286 has been studied. The line intensity is constant within the limit of the errors, while the radial velocity is slightly variable. A differential analysis by means of the curve-of-growth method has been made, using 5 And, F5 V as standard star. Moreover, an atmospheric model has been computed; the results of the fine analysis indicate a defect of Sc by a factor of 30 and a defect of Ca by a factor included between 4 and 25; Si, Ti, V, Cr and Fe are normal, Mn, Co, Ni in slight excess by factors included between 2 and 5. Sr, Y, Zr, Ba and La are in excess by factors lower than 10; Ce, Nd and Sm are almost normal; Eu and Gd are in excess by factors of 250 and 4, respectively. These results are compared with the predictions of the diffusion theory.
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