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

The metal content of clusters of galaxies and its relation to their stellarcontent is revisited making use of a cluster sample for which all four basicparameters are homogeneously measured within consistent radii, namelycore-excised mass-weighted metallicity plus total, stellar and ICM masses. Forclusters of total mass $M_{500} >$ $\sim 10^{14}$ $M_{\odot}$ nice agreement isfound between their iron content and what expected from empirical supernovayields. For the same clusters, there also appears to be at least as much ironin the intracluster medium (ICM) as there is still locked into stars (i.e., theICM/stars metal share is about unity). However, for more massive clusters thestellar mass fraction appears to drop substantially without being accompaniedby a drop in the ICM metallicity, thus generating a major tension with thenucleosynthesis expectation and inflating the metal share to extremely highvalues (up to $\sim 6$). Various possible solutions of this conundrum arediscussed, but are all considered either astrophysically implausible, orlacking an independent observational support. For this reason we stillentertain the possibility that even some of the best cluster data may befaulty, though we are not able to identify any obvious bias. Finally, based onthe stellar mass-metallicity relation for local galaxies we estimate thecontribution of galaxies to the ICM enrichment as a function of their mass,concluding that even the most massive galaxies must have lost a major fractionof the metals they have produced.

Chemical Evolution on the Scale of Clusters of Galaxies: A Conundrum?