The discovery space of ELT-ANDES. Stars and stellar populations

Roederer, Ian U.; Alvarado-Gómez, Julián D.; Allende Prieto, Carlos; Adibekyan, Vardan; Aguado, David S.; Amado, Pedro J.; Amazo-Gómez, Eliana M.; Baratella, Martina; Barnes, Sydney A.; Bensby, Thomas; Bigot, Lionel; Chiavassa, Andrea; de Souza, Armando Domiciano; González Hernández, J. I.; Hansen, Camilla Juul; Järvinen, Silva P.; Korn, Andreas J.; Lucatello, Sara; Magrini, Laura; Maiolino, Roberto; Marcantonio, Paolo Di; Marconi, Alessandro; De Medeiros, José R.; Mucciarelli, Alessio; Nardetto, Nicolas; Origlia, Livia; Peroux, Celine; Poppenhäger, Katja; Reiners, Ansgar; Rodríguez-López, Cristina; Romano, Donatella; Salvadori, Stefania; Tisserand, Patrick; Venn, Kim; Wade, Gregg A.; Zanutta, Alessio
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Experimental Astronomy

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The ArmazoNes high Dispersion Echelle Spectrograph (ANDES) is the optical and near-infrared high-resolution echelle spectrograph envisioned for the Extremely Large Telescope (ELT). We present a selection of science cases, supported by new calculations and simulations, where ANDES could enable major advances in the fields of stars and stellar populations. We focus on three key areas, including the physics of stellar atmospheres, structure, and evolution; stars of the Milky Way, Local Group, and beyond; and the star-planet connection. The key features of ANDES are its wide wavelength coverage at high spectral resolution and its access to the large collecting area of the ELT. These features position ANDES to address the most compelling questions and potentially transformative advances in stellar astrophysics of the decades ahead, including questions which cannot be anticipated today.