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• W3106525798 endingPage "53" @default.
• W3106525798 startingPage "53" @default.
• W3106525798 abstract "We have derived new very accurate abundances of the Fe-group elements Sc through Zn (Z = 21-30) in the bright main-sequence turnoff star HD 84937, based on high-resolution spectra covering the visible and ultraviolet spectral regions. New or recent laboratory transition data for 14 species of seven elements have been used. Abundances from more than 600 lines of non-Fe species have been combined with about 550 Fe lines in HD 84937 to yield abundance ratios of high precision. The abundances have been determined from both neutral and ionized transitions, which generally are in agreement with each other. We find no substantial departures from standard LTE Saha ionization balance in this [Fe/H] = -2.32 star. Noteworthy among the abundances are: [Co/Fe] = 0.14 and [Cu/Fe] = -0.83, in agreement with past studies abundance trends in this and other low metallicity stars; and <[Sc,Ti,V/Fe]> = 0.31, which has not been noted previously. A detailed examination of scandium, titanium, and vanadium abundances in large-sample spectroscopic surveys reveals that they are positively correlated in stars with [Fe/H] < -2; HD 84937 lies at the high end of this correlation. These trends constrain the synthesis mechanisms of Fe-group elements. We also examine the GCE abundance trends of the Fe-group elements, including a new nucleosynthesis model with jet-like explosion effects." @default.
• W3106525798 created "2020-11-23" @default.
• W3106525798 creator A5003206274 @default.
• W3106525798 creator A5021304182 @default.
• W3106525798 creator A5028252018 @default.
• W3106525798 creator A5045789460 @default.
• W3106525798 creator A5051043355 @default.
• W3106525798 creator A5058336118 @default.
• W3106525798 creator A5076799116 @default.
• W3106525798 date "2016-01-20" @default.
• W3106525798 modified "2023-10-03" @default.
• W3106525798 title "IRON-GROUP ABUNDANCES IN THE METAL-POOR MAIN-SEQUENCE TURNOFF STAR HD 84937" @default.
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