| Issue |
A&A
Volume 698, May 2025
|
|
|---|---|---|
| Article Number | A289 | |
| Number of page(s) | 12 | |
| Section | Stellar atmospheres | |
| DOI | https://doi.org/10.1051/0004-6361/202453476 | |
| Published online | 25 June 2025 | |
Abundance analysis of benchmark M dwarfs
1
Observational Astrophysics, Department of Physics and Astronomy, Uppsala University,
Box 516,
751 20
Uppsala,
Sweden
2
Thüringer Landessternwarte,
Sternwarte 5,
07778
Tautenburg,
Germany
★ Corresponding author: ulrike.heiter@physics.uu.se
Received:
17
December
2024
Accepted:
5
May
2025
Context. Abundances of M dwarfs, the most numerous stellar type in the Galaxy, can enhance our understanding of planet formation processes. They can also be used to study the chemical evolution of the Galaxy, where α-capture elements play a particularly important role.
Aims. We aim to obtain the abundances of Fe, Ti, and Ca for a small sample of well-known M dwarfs for which interferometric measurements are available. These stars and their abundances are intended to serve as a benchmark for future large-scale spectroscopic studies.
Methods. We analysed spectra obtained with the GIANO-B spectrograph. Turbospectrum and the wrapper TSFitPy were used with MARCS atmospheric models to fit synthetic spectra to the observed spectra. We performed a differential abundance analysis in which we also analysed a solar spectrum using the same method and then subtracted the derived abundances line by line. The median was taken as the final abundance of each element and each star.
Results. Our abundances of Fe, Ti, and Ca mostly agree within the uncertainties with other values from the literature. However, there are few studies to compare with.
Key words: techniques: spectroscopic / stars: abundances / stars: atmospheres / stars: late-type / stars: low-mass
© The Authors 2025
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This article is published in open access under the Subscribe to Open model. Subscribe to A&A to support open access publication.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.