Bibcode
Brandner, Wolfgang; Martin, E. L.
Bibliographical reference
Astronomy and Astrophysics (ISSN 0004-6361), vol. 294, no. 3, p. 744-746
Advertised on:
2
1995
Citations
31
Refereed citations
28
Description
HD 36705 (AB Doradus) and HD 155555 (V824 Ara) are two nearby very
active cool stars. Both have strong Li I (lambda)6708 resonance lines,
implying high surface Li abundances, comparable to those of very young T
Tauri stars. They also have late M-type visual companions which share
their proper motion, as confirmed by new astrometric measurements
presented in this paper. We have carried out intermediate resolution
optical spectroscopic observations of the faint companions to HD 36705
and HD 155555. Our main result is that these M-type companions show
large Li depletions, and we argue that the dramatic difference in Li
abundance between the components of these visual binaries can be
understood if they are in an evolutionary stage intermediate between T
Tauri stars and Pleiades low mass stars.