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- W1889105163 abstract "Using evolutionary population synthesis, we present 13 refined absorption-line indices defined by the Lick Observatory Image Dissector Scanner (Lick/IDS) system for an extensive set of instantaneous-burst binary stellar populations (BSPs) at high resolution (similar to 0.3 angstrom), and 38 indices at intermediate resolution (3 angstrom). The ages of the populations are at an interval of 1 Gyr in the range 1-15 Gyr, and the metallicities are in the range 0.004-0.03. These indices are obtained by two methods: (i) using the empirical fitting functions (FFs method); (ii) measured directly from the synthetic spectra (DC method). Together with our previous paper, a data base of Lick/IDS spectral absorption-line indices for BSPs at high and intermediate resolutions is provided. This set of indices includes 21 indices of Worthey et al., four Balmer indices defined by Worthey & Ottaviani, and 13 indices with the new passband definitions of Trager et al. The full set of synthetic indices and the integrated pseudo-continuum are listed in the Appendices, which are only available online at http://www.blackwell-synergy.com/ or from our website (http://www.ast9.com/), or on request from the first author. Moreover, the full set of the integrated spectral energy distributions can be obtained from our website. We compare the synthetic Lick/IDS indices obtained by the FFs method and those by the DC method for BSPs with various metallicities, and find that the discrepancies are significant: Ca4455 (index 6), Fe4668 (8), Mg-b (13), Fe5709 (17), NaD (19), TiO1 (20) and TiO2 (21, except for Z = 0.02) in the W94 system, Ca4455(T) (6(T)), C(2)4668(T) (8(T)), NaDT (19(T)), TiO1T (20(T)) and TiO2T (21(T), except for Z = 0.02) in the T98 system obtained by the DC method are less (bluer) than the corresponding ones obtained by the FFs method for all metallicities. Ca4227 (index 3), Fe5782 (18), Ca4227(T) (3(T)) and Fe5782(T) (18(T)) are greater at Z = 0.03 and become bluer at Z = 0.004; the Fe5709(T) (17(T)) index is less at Z = 0.03 and becomes redder at Z = 0.004 than the corresponding ones obtained by the FFs method." @default.
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- W1889105163 date "2006-06-16" @default.
- W1889105163 modified "2023-09-23" @default.
- W1889105163 title "A library of Lick Observatory Image Dissector Scanner indices for binary stellar populations" @default.
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- W1889105163 doi "https://doi.org/10.1111/j.1365-2966.2006.10557.x" @default.
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