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J/A+A/310/879 Hyades binaries (Barrado+, 1996)
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table1
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Query from: http://vizier.cds.unistra.fr/cgi-bin/VizieR?-source=J/A+A/310/879
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Lithium abundance in binaries of the Hyades open cluster
Barrado y Navascues D., Stauffer J.R.
<Astron. Astrophys. 310, 879 (1996)>
=1996A&A...310..879B (SIMBAD/NED BibCode)
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ADC_Keywords: Photometry, UBV
Keywords: stars: abundances - stars: binaries: close - star: late-type -
open clusters: Hyades
Description:
We have derived accurate and homogeneous lithium abundances in 49 Main
Sequence binary systems belonging to the Hyades open cluster by using
a deconvolution method to determine individual magnitudes and colors
for the primary and secondary components of the binary. The input
parameters of the model are the observed Li equivalent width, the
actual distance to the binary, the integrated apparent magnitude and
the integrated colors of the binaries -BV(RI)_K_. We show that the
general behavior is the same in binaries and in single stars (Li is
depleted faster in K stars than in G stars and there is a deep dip for
mid-F stars). However, there is a larger scatter in the abundances of
binary systems than in single stars. Moreover, in general, binary
systems have an overabundance, which is more conspicuous in close
binaries. In fact, there is a cut-off period, which can be estimated
as P_orb_ 9d. This value is in excellent agreement with the
theoretical prediction of Zahn (1994).