Matches in SemOpenAlex for { <https://semopenalex.org/work/W3022963295> ?p ?o ?g. }
Showing items 1 to 87 of
87
with 100 items per page.
- W3022963295 endingPage "444" @default.
- W3022963295 startingPage "443" @default.
- W3022963295 abstract "The lithium isotope ratio in stars can be determined from high resolution observations of the profile of the Li I 6707 Å absorption line. Earlier studies of old F and G stars (Andersen et al. 1984, Maurice et al. 1984, Pilachowski et al. 1989) have led to upper limits of 6 Li/ 7 Li ranging from 0.05 to 0.10. Recently, Smith, Lambert & Nissen (1993) seem to have detected 6 Li in HD 84937 - a metal-poor turnoff star with T eff ⋍ 6200 K and [Fe/H] ⋍ —2.4. An isotope ratio 6 Li/ 7 Li = 0.05 ± 0.02 was determined (see Fig. 1) The detection has been confirmed by Hobbs & Thorburn (1994), who derived 6 Li/ 7 Li = 0.07 ± 0.03. The main contribution to the quoted (1σ) errors comes from the noise in the spectrum (S/N = 400) and possible errors in the Doppler broadening of the Li line (Nissen 1994). This broadening is due to stellar rotation and macro-turbulent motions in the stellar atmosphere and can be determined from the profiles of unblended metallic absorption lines. As discussed in detail by Steigman et al. (1993) the presence of 6 Li in the atmosphere of HD 84937 is consistent with the measured Be abundance (Boesgaard & King 1993) within the context of i ) Standard Big Bang nucleosynthesis, ii ) Pop. II cosmic ray nucleosynthesis and iii ) standard (non-rotating) models for Li depletion. In particular, Steigman et al. derive D 6 > 0.2, where D 6 is the depletion factor for 6 Li. As shown by Chaboyer (1994) standard stellar evolution models with new opacities predict D 6 ≃ 0.4 for turnoff stars and subgiants with T eff > 5900 K. The same models predict D 7 ≃ 1.0, i.e. no 7 Li depletion for main sequence stars as well as subgiants with T eff ≥ 5800 K." @default.
- W3022963295 created "2020-05-13" @default.
- W3022963295 creator A5024135496 @default.
- W3022963295 date "1995-01-01" @default.
- W3022963295 modified "2023-10-16" @default.
- W3022963295 title "The Lithium Isotope Ratio In Old Stars" @default.
- W3022963295 cites W1974435520 @default.
- W3022963295 cites W1975544085 @default.
- W3022963295 cites W2025087243 @default.
- W3022963295 cites W2050114787 @default.
- W3022963295 cites W2056929988 @default.
- W3022963295 cites W2071631043 @default.
- W3022963295 doi "https://doi.org/10.1017/s1539299600011667" @default.
- W3022963295 hasPublicationYear "1995" @default.
- W3022963295 type Work @default.
- W3022963295 sameAs 3022963295 @default.
- W3022963295 citedByCount "0" @default.
- W3022963295 crossrefType "journal-article" @default.
- W3022963295 hasAuthorship W3022963295A5024135496 @default.
- W3022963295 hasBestOaLocation W30229632951 @default.
- W3022963295 hasConcept C101638190 @default.
- W3022963295 hasConcept C117760992 @default.
- W3022963295 hasConcept C121332964 @default.
- W3022963295 hasConcept C127313418 @default.
- W3022963295 hasConcept C1276947 @default.
- W3022963295 hasConcept C134018914 @default.
- W3022963295 hasConcept C145148216 @default.
- W3022963295 hasConcept C150846664 @default.
- W3022963295 hasConcept C151730666 @default.
- W3022963295 hasConcept C164304813 @default.
- W3022963295 hasConcept C185544564 @default.
- W3022963295 hasConcept C193619082 @default.
- W3022963295 hasConcept C198352243 @default.
- W3022963295 hasConcept C2524010 @default.
- W3022963295 hasConcept C2778541603 @default.
- W3022963295 hasConcept C2779343474 @default.
- W3022963295 hasConcept C33923547 @default.
- W3022963295 hasConcept C4397270 @default.
- W3022963295 hasConcept C44870925 @default.
- W3022963295 hasConcept C4839761 @default.
- W3022963295 hasConcept C62520636 @default.
- W3022963295 hasConcept C71924100 @default.
- W3022963295 hasConcept C88991977 @default.
- W3022963295 hasConceptScore W3022963295C101638190 @default.
- W3022963295 hasConceptScore W3022963295C117760992 @default.
- W3022963295 hasConceptScore W3022963295C121332964 @default.
- W3022963295 hasConceptScore W3022963295C127313418 @default.
- W3022963295 hasConceptScore W3022963295C1276947 @default.
- W3022963295 hasConceptScore W3022963295C134018914 @default.
- W3022963295 hasConceptScore W3022963295C145148216 @default.
- W3022963295 hasConceptScore W3022963295C150846664 @default.
- W3022963295 hasConceptScore W3022963295C151730666 @default.
- W3022963295 hasConceptScore W3022963295C164304813 @default.
- W3022963295 hasConceptScore W3022963295C185544564 @default.
- W3022963295 hasConceptScore W3022963295C193619082 @default.
- W3022963295 hasConceptScore W3022963295C198352243 @default.
- W3022963295 hasConceptScore W3022963295C2524010 @default.
- W3022963295 hasConceptScore W3022963295C2778541603 @default.
- W3022963295 hasConceptScore W3022963295C2779343474 @default.
- W3022963295 hasConceptScore W3022963295C33923547 @default.
- W3022963295 hasConceptScore W3022963295C4397270 @default.
- W3022963295 hasConceptScore W3022963295C44870925 @default.
- W3022963295 hasConceptScore W3022963295C4839761 @default.
- W3022963295 hasConceptScore W3022963295C62520636 @default.
- W3022963295 hasConceptScore W3022963295C71924100 @default.
- W3022963295 hasConceptScore W3022963295C88991977 @default.
- W3022963295 hasLocation W30229632951 @default.
- W3022963295 hasLocation W30229632952 @default.
- W3022963295 hasOpenAccess W3022963295 @default.
- W3022963295 hasPrimaryLocation W30229632951 @default.
- W3022963295 hasRelatedWork W1991145439 @default.
- W3022963295 hasRelatedWork W2009441743 @default.
- W3022963295 hasRelatedWork W2041754657 @default.
- W3022963295 hasRelatedWork W2042708999 @default.
- W3022963295 hasRelatedWork W2154905722 @default.
- W3022963295 hasRelatedWork W3009349190 @default.
- W3022963295 hasRelatedWork W3099016334 @default.
- W3022963295 hasRelatedWork W3100501147 @default.
- W3022963295 hasRelatedWork W3100616992 @default.
- W3022963295 hasRelatedWork W4292634909 @default.
- W3022963295 hasVolume "10" @default.
- W3022963295 isParatext "false" @default.
- W3022963295 isRetracted "false" @default.
- W3022963295 magId "3022963295" @default.
- W3022963295 workType "article" @default.