English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this work we present and discuss the observations of the Mn abundances for247 FGK dwarfs, located in the Galactic disc with metallicity -1<Fe/H]<+0.3.The observed stars belong to the substructures of the Galaxy thick and thindiscs, and to the Hercules stream. The observations were conducted using the1.93 m telescope at Observatoire de Haute-Provence (OHP, France) equipped withthe echelle type spectrographs ELODIE and SOPHIE. The abundances were derivedunder the LTE approximation, with an average error for the [Mn/Fe] ratio of0.10 dex. For most of the stars in the sample Mn abundances are not availablein the literature. We obtain an evolution of [Mn/Fe] ratio with the metallicity[Fe/H] consistent with previous data compilations. In particular, within themetallicity range covered by our stellar sample the [Mn/Fe] ratio is increasingwith the increase of metallicity. This due to the contribution to the Galacticchemical evolution of Mn and Fe from thermonuclear supernovae. We confirm thebaseline scenario where most of the Mn in the Galactic disc and in the Sun ismade by thermonuclear supernovae. In particular, the effective contributionfrom core-collapse supernovae to the Mn in the Solar system is about 10-20%.However, present uncertainties affecting the production of Mn and Fe inthermonuclear supernovae are limiting the constraining power of the observed[Mn/Fe] trend in the Galactic discs on, e.g., the frequency of differentthermonuclear supernovae populations. The different production of these twoelements in different types of thermonuclear supernovae needs to bedisentangled by the dependence of their relative production on the metallicityof the supernova progenitor.

Mn abundances in the stars of the Galactic disc with metallicities -1.0 < [Fe/H] < 0.3