Resolution of the classical Hyades lithium problem
- Univ. of California, Santa Cruz, CA (United States). Lick Observatory and Astronomy Board
- Los Alamos National Lab., NM (United States)
For the very first time, it has recently proved possible to make a well-motivated, physically plausible, and self-consistent prediction of the Hyades G- and K-dwarf (Li,T{sub eff}) relationship that matches the long-unexplained observations. The method employs the latest Iglesias &, Rogers (OPAL) interior opacities and Alexander surface opacities (whose respective values are now themselves close to empirical predictions or estimates made earlier in this Hyades project), King`s recently discovered [O/Fe] enhancement (another prediction!) and utterly conventional PMS (pre-main-sequence) evolution unaided by arbitrary and ad hoc adjustable parameters. Thus, the following assumptions form a self-consistent set explaining the Hyades G- and K-dwarf (Li,T{sub eff}) observations: (i) Pop. I interior opacities are now essentially correct; (ii) Pop. I surface opacities are now essentially correct; (iii) The Hyades distance is now essentially correct; (iv) The Hyades [Fe/H] and [O/Fe] are now essentially correct, and possible changes in [Ne, Mg., or Si/Fe] are likely to have only a small effect; (v) Convective envelope overshooting is negligible; (vi) Quarreling with the above means finding at least two compensating errors in assumptions (i) through (v).
- Research Organization:
- Los Alamos National Lab., NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 10103366
- Report Number(s):
- LA-UR-94-3937; CONF-9405264-1; ON: DE95003661; TRN: 95:000456
- Resource Relation:
- Conference: Light element abundances,Elba (Italy),23-28 May 1994; Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
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