Iron abundance vs. frequency of maximum power for stars with asteroseismic detections, modified from a similar plot by Huber et al. (2024). The star shows HD 140283 (this work), while the points are literature values. The black points are from Pinsonneault et al. (2014), Serenelli et al. (2017), Matsuno et al. (2021) and Schonhut-Stasik et al. (2024). The filled coloured points show stars with modelling of individual frequencies; ν Indi (Bedding et al. 2006; Chaplin et al. 2020), KIC 7341231 (Deheuvels et al. 2012), KIC 7693833 and KIC 4671239 (Larsen et al. 2025), KIC 8144907 (Huber et al. 2024), and HD 175305 and HD 128279 (Lindsay et al. 2025), while the open circle shows EPIC 206443679 (Valentini et al. 2019) with modelling of the global seismic parameters.