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- W4386687194 abstract "We report on the first detailed infrared chemical analysis of five binary members (S277, S997, S975, S1031, and S1195) in the open cluster M67 (NGC 2682). These stars are located outside (bluer and/or brighter than) the main-sequence turnoff region in M67. High-resolution (R ~ 45,000) near-infrared spectra were obtained with the Immersion GRating INfrared Spectrograph (IGRINS) at the McDonald Observatory 2.7 m Harlan J. Smith Telescope, providing full spectral coverage of the H and K bands. The abundances of C, Na, Mg, Al, Si, S, Ca, Fe, and Ni are measured using neutral atomic absorption lines. We detect v sin i greater than or equal to 25 km s-1 in three of our program stars: S1031, S975, and S1195. We find our derived abundances to be in good agreement with turnoff star abundances, similar to published analyses of blue straggler stars in M67 from optical spectra. Detection of a carbon enhancement or depletion resulting from mass transfer is difficult due to the uncertainties in the carbon abundance and the relatively modest changes that may occur through red giant and asymptotic giant branch evolution." @default.
- W4386687194 created "2023-09-13" @default.
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- W4386687194 date "2023-09-12" @default.
- W4386687194 modified "2023-10-16" @default.
- W4386687194 title "M67 Blue Stragglers with High-resolution Infrared Spectroscopy" @default.
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- W4386687194 doi "https://doi.org/10.3847/1538-3881/acf2f3" @default.
- W4386687194 hasPublicationYear "2023" @default.
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