On the Problem of Selective Enhancement of Barium in the Atmospheres of BaII Stars

Details On the Problem of Selective Enhancement of Barium in the Atmospheres of BaII Stars On the Problem of Selective Enhancement of Barium in the Atmospheres of BaII Stars

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ap%26ss.236..185m&link_type=abstract

Astrophysics and Space Science, Volume 236, Issue 2, pp.185-199

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

High-resolution spectroscopy and standard LTE analysis of 31 barium and normal red giants (Astron. Astrophys. 283, 1994, p. 937) shows a selective enhancement of Ba (˜+0.5 dex) in two stars. HR 3845 and HD 130386, relative to the standard star ɛ Vir. We do not overinterpret these enhancements due to possible errors in the equivalent widths or in the atmospheric parameters. The non-LTE analysis of BaII in the atmospheres of red (barium) giants shows that the corrections for the non-LTE effects is relatively small, reaching a maximum of -0.16 dex, therefore, the enhancement of barium had apparently another nature.

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