RT Journal Article
T1 The CARMENES search for exoplanets around M dwarfs magnesium and silicon abundances of K7–M5.5 stars
A1 Tabernero, H. M.
A1 Shan, Y.
A1 Caballero, J. A.
A1 Duque Arribas, Christian
A1 Montes Gutiérrez, David
A1 González Hernández, J. I.
A1 Zapatero Osorio, M. R.
A1 Schweitzer, A.
A1 Henning, Th.
A1 Cortés Contreras, Miriam
A1 Quirrenbach, A.
A1 Amado, P. J.
A1 Reiners, A.
A1 Ribas, I.
A1 Bergond, G.
A1 Morales, J. C.
AB We present the abundances of magnesium (Mg) and silicon (Si) for 314 dwarf stars with spectral types in the interval K7.0–M5.5 (T_(eff) range ≈ 4200–3050 K) observed with the CARMENES high-resolution spectrograph at the 3.5 m telescope at the Calar Alto Observatory. Our analysis employs the BT-Settl model atmospheres, the radiative transfer code Turbospectrum, and a state-of-the-art selection of atomic and molecular data. These Mg and Si abundances are critical for understanding both the chemical evolution and assembly of the Milky Way and the formation and composition of rocky planets. Our chemical abundances show a line-to-line scatter at the level of 0.1 dex for all studied spectral types. The typical error bar of our chemical abundance measurements is ± 0.11 dex (Mg) and ± 0.16 dex (Si) for all spectral types based on the comparison of the results obtained for stellar components of multiple systems. The derived abundances are consistent with the galactic evolution trends and observed chemical abundance distribution of earlier FGK-type stars in the solar neighbourhood. Besides, our analysis provides compatible abundances for stars in multiple systems. In addition, we studied the abundances of different galactic stellar populations. In this paper, we also explore the relation of the Mg and Si abundances of stars with and without known planets.
PB EDP Science
SN 0004-6361
YR 2024
FD 2024
LK https://hdl.handle.net/20.500.14352/123780
UL https://hdl.handle.net/20.500.14352/123780
LA eng
NO Tabernero, H. M., Shan, Y., Caballero, J. A., Duque-Arribas, C., Montes, D., Hernández, J. G., ... & Morales, J. C. (2024). The CARMENES search for exoplanets around M dwarfs-Magnesium and silicon abundances of K7–M5. 5 stars. Astronomy & Astrophysics, 689, A223.
NO Max Planck Society
NO Consejo Superior de Investigaciones Cientificas (CSIC) (España)
NO Gobierno de España
NO European Union (EU)
NO Max-Planck-Institut fur Astronomie
NO Instituto de Astrofísica de Andalucía
NO Landessternwarte Konigstuhl
NO Institut de Ciencies de l'Espai (España)
NO Institut fur Astrophysik Gottingen
NO Universidad Complutense de Madrid
NO Klaus Tschira Stiftung
NO Thuringer Landesstern-warte Tautenburg
NO States of Baden-Wurttemberg and Niedersachsen
NO Instituto de Astrofísica de Canarias
NO Junta de Andalucía
NO Hamburger Sternwarte
NO Ministerio de Ciencia e Innovación (España)
NO Centro de Astrobiología (España)
NO RDF "A way of making Europe"
NO Centro Astronómico Hispano-Alemán
NO Centre of Excellence "Severo Ochoa" and "Maria de Maeztu" (España)
NO Deutsche Forschungsgemeinschaft through the Major Research Instrumentation Programme and Research Unit
NO Comunidad de Madrid
NO NextGenerationEU European Union through the Recovery and Resilience Facility
DS Docta Complutense
RD 21 ene 2026