J/AJ/106/1080 Lithium in Praesepe (Soderblom+, 1993)
The evolution of the lithium abundances of solar-type stars. IV. Praesepe
SODERBLOM D.R., FEDELE S.B., JONES B.F., STAUFFER J.R., PROSSER C.F.
<Astron. J. 106, 1080 (1993)>
=1993AJ....106.1080S 1993AJ....106.1080S (SIMBAD/NED Reference)
ADC_Keywords: Clusters, open; Spectroscopy; Equivalent widths; Abundances
Abstract:
Echelle observations are presented of lithium in 63 F and G dwarfs of
the Praesepe cluster. For stars earlier than about G0V, Praesepe
follows the same trends seen in the Hyades, which has approximately the
same age and composition. Stars in Praesepe later than about G5V have
more Li than their Hyades counterparts, possibly because Praesepe is
slightly younger than the Hyades or has slightly lower metallicity.
Significant differences in the abundance of Li are seen among stars of
the same color, and, as in the Hyades, there is a tendency for the
deviant stars to be binaries to the extent that duplicity in Praesepe
is known. There are also stars with much less Li than most cluster
members yet which appear to be true members of Praesepe. The close
binary KW 181 has a normal Li abundance, despite the fact that similar
close binaries in the Hyades are Li rich.
File Summary:
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File Name Lrecl Records Explanations
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ReadMe 80 . This file
table2 46 63 Observations of lithium in Praesepe
solar-type stars
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Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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1- 3 I3 --- KW Number in catalog of Klein-Wassink (1927)
6- 9 I4 --- VL []? Number in catalog of Vanderlinden (1933)
12- 14 A3 ---- Sp Spectral type, where available, taken from
Corbally & Garrison (1986), Corbally &
Garrison (1983) or Wilson (1963), in order
of preference
17- 20 F4.2 mag B-V B-V color from Mendoza (1967)
23- 26 F4.2 mag V-I Johnson (V-I) from Mendoza (1967)
29- 32 I4 K Teff Effective temperature
35 A1 --- l_WLi Limit flag on WLi
36- 38 I3 0.1nm WLi Equivalent width of Li 6708
41 A1 --- l_log(N(Li)) Limit flag on N(Li)
42- 46 F5.2 --- log(N(Li)) Lithium abundance (scale log N(H) = 12)
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References:
Corbally C.J. & Garrison R.F. 1986, AJ, 92, 90
Corbally C.J. & Garrison R.F. 1983, JRASC, 77, 28
Klein-Wassink, W.J. 1927, Groningen Publ. No. 41
Mendoza E.E. 1967, Bol. Obs. Tonantzintla y Tacubaya, 4, 149
Vanderlinden, H.L. 1933, Etude de l'amas de Praesepe (Gembloux: J. Duculot)
Wilson O.C. 1963, ApJ, 138, 832
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Origin: AAS CD-ROM series, Volume 1, 1993
(End) Patricia Bauer [CDS] 14-Sep-1994