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• W2012292810 abstract "Spectra of the He I 10830 line have been obtained for 23 metal-poor stars, the majority of which are dwarfs ranging in metallicity from [Fe/H] = -2.1 to -0.8. The data were acquired with the NIRSPEC spectrograph on the Keck 2 telescope. Most of these subdwarfs and dwarfs are found to exhibit a He I absorption line indicative of the presence of chromospheres. The equivalent width of the 10830 absorption profile is generally less than 70 mA, and covers a range similar to that found in solar metallicity stars of low activity. Among the subdwarfs the He I equivalent width does not correlate with either [Fe/H] metallicity or (B-V) color. Some evidence for asymmetric profiles is found among metal-poor dwarfs, but not the high-speed blue-shifted absorption displayed by some metal-poor red giants." @default.
• W2012292810 created "2016-06-24" @default.
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• W2012292810 date "2012-12-01" @default.
• W2012292810 modified "2023-09-27" @default.
• W2012292810 title "The λ 10830 He I Absorption Line Among Metal-Poor Subdwarfs" @default.
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• W2012292810 doi "https://doi.org/10.1086/668865" @default.
• W2012292810 hasPublicationYear "2012" @default.
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