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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

CONTEXT: Manganese is an iron-peak element and although the nucleosynthesispath that leads to its formation is fairly well understood, it remains unclearwhich objects, SN II and/or SN Ia, that contribute the majority of Mn to theinterstellar medium. It also remains unclear to which extent the supernovae Mnyields depend on the metallicity of the progenitor star or not. AIMS: By usinga well studied and well defined sample of 95 dwarf stars we aim at furtherconstraining the formation site(s) of Mn. METHODS: We derive Mn abundancesthrough spectral synthesis of four Mn I lines at 539.4, 549.2, 601.3, and 601.6nm. Stellar parameters and data for oxygen are taken from Bensby et al. (2003,2004, 2005). RESULTS: When comparing our Mn abundances with O abundances forthe same stars we find that the abundance trends in the stars with kinematicsof the thick disk can be explained by metallicity dependent yields from SN II.We go on and combine our data for dwarf stars in the disks with data for dwarfand giant stars in the metal-poor thick disk and halo from the literature. Wefind that dwarf and giant stars show the same trends, which indicates thatneither non-LTE nor evolutionary effects are a major concern for Mn.Furthermore, the [Mn/O] vs [O/H] trend in the halo is flat. CONCLUSIONS: Weconclude that the simplest interpretation of our data is that Mn is most likelyproduced in SN II and that the Mn yields for such SNae must be metallicitydependent. Contribution from SN Ia in the metal-rich thin disk can not,however, be excluded.Comment: 15 pages, Accepted for publication in A&

Manganese trends in a sample of thin and thick disk stars