Bibcode
                                    
                            Ashok, Aishwarya; Zasowski, Gail; Seth, Anil; Hasselquist, Sten; Bergsten, Galen; Cooper, Olivia; Boardman, Nicholas; Bizyaev, Dmitry; Goytia, Sofia Meneses; García-Hernández, D. A.; Roman-Lopes, Alexandre
    Bibliographical reference
                                    The Astronomical Journal
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                        4
            
                        2021
            
  Citations
                                    12
                            Refereed citations
                                    11
                            Description
                                    Integrated light spectroscopy from galaxies can be used to study the stellar populations that cannot be resolved into individual stars. This analysis relies on stellar population synthesis (SPS) techniques to study the formation history and structure of galaxies. However, the spectral templates available for SPS are limited, especially in the near-infrared (near-IR). We present A-LIST (APOGEE Library of Infrared SSP Templates), a new set of high-resolution, near-IR SSP spectral templates spanning a wide range of ages (2-12 Gyr), metallicities ( - 2.2 < [M/H] < + 0.4) and α abundances ( - 0.2 < [α/M] < + 0.4). This set of SSP templates is the highest resolution (R ∼ 22, 500) available in the near-IR, and the first such based on an empirical stellar library. Our models are generated using spectra of ∼300,000 stars spread across the Milky Way, with a wide range of metallicities and abundances, from the APOGEE survey. We show that our model spectra provide accurate fits to M31 globular cluster spectra taken with APOGEE, with best-fit metallicities agreeing with those of previous estimates to within ∼0.1 dex. We also compare these model spectra to lower-resolution E-MILES models and demonstrate that we recover the ages of these models to within ∼1.5 Gyr. This library is available in https://github.com/aishashok/ALIST-library.
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