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dc.contributor.authorVandenBerg, Don A
dc.contributor.authorEdvardsson, Bengt
dc.contributor.authorCasagrande, Luca
dc.contributor.authorFerguson, Jason W.
dc.date.accessioned2022-03-22T17:24:59Z
dc.date.available2022-03-22T17:24:59Z
dc.date.issued2021-11-04
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, Volume 509, Issue 3, January 2022, Pages 4189–4207, https://doi.org/10.1093/mnras/stab2996en_US
dc.identifier.issn00358711
dc.identifier.urihttps://soar.wichita.edu/handle/10057/22733
dc.description© 2020 by the author(s), Preprinten_US
dc.description.abstractNew, high-resolution MARCS synthetic spectra have been calculated for more than a dozen mixtures of the metals allowing, in turn, for variations in C:N:O, [CNO/Fe], and enhanced abundances of C, O, Mg, and Si. Bolometric corrections (BCs) for many of the broad-band filters currently in use have been generated from these spectra. Due to improved treatments of molecules that involve atoms of C, N, and O, the BCs for UV and blue passbands, in particular, differ substantially from those derived from previous MARCS models. These differences, and the effects on the BCs of varying the abundances of the metals, are shown in a number of instructive plots. Stellar evolutionary grids for −2.5 ≤ [Fe/H] ≤−0.5 have also been computed for the different mixtures. Isochrones based on these tracks are intercompared on the theoretical H–R diagram and on a few of the colour–magnitude diagrams that can be constructed from HST Wide Field Camera 3 (WFC3) F336W, F438W, F606W, F814W, F110W, and F160W observations. For the first application of these models, isochrones have been fitted to WFC3 photometry of the globular cluster NGC 6496 from the HST UV Legacy Survey, with very encouraging results.en_US
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.relation.ispartofseriesMonthly Notices of the Royal Astronomical Society;2022
dc.subjectStars: abundancesen_US
dc.subjectStars: evolutionen_US
dc.subjectHertzsprung-Russell and colour-magnitude diagramsen_US
dc.subjectStars: population IIen_US
dc.subjectGlobular clusters: individual: NGC 6496en_US
dc.titleModels of metal-poor stars with different initial abundances of C, N, O, Mg, and Si. I. Bolometric corrections derived from new MARCS synthetic spectra and their implications for observed colour-magnitude diagramsen_US
dc.typeArticleen_US
dc.typePreprinten_US
dc.rights.holderCopyright 2021 by the Author(s)en_US


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