Orbital elements of barium stars formed through a wind accretion scenario

Details Orbital elements of barium stars formed through a wind accretion scenario Orbital elements of barium stars formed through a wind accretion scenario

2000-11-06

arxiv.org/abs/astro-ph/0011120v1

Astronomy and Astrophysics

Astrophysics

7 pages, LaTex, 4 PS figures and 1 table included, accepted for publication in A & A

Scientific paper

Taking the total angular momentum conservation in place of the tangential momentum conservation, and considering the square and higher power terms of orbital eccentricity e, the changes of orbital elements of binaries are calculated for wind accretion scenario. These new equations are used to quantitatively explain the observed (e,logP) properties of normal G, K giants and barium stars. Our results reflect the evolution from G, K giant binaries to barium binaries, moreover, the barium stars with longer orbital periods P>1600 days may be formed by accreting part of the ejecta from the intrinsic AGB stars through wind accretion scenario.

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