Discrepancies in the ages of young star clusters; evidence for mergers?
- Beasor, Emma R
- Davies, Ben
- Smith, Nathan
- Bastian, Nate
DOIAbstract
There is growing evidence that star clusters can no longer be considered simple stellar populations. Intermediate- and old-age clusters are often found to have extended main-sequence turn-offs (eMSTOs) which are difficult to explain with single-age isochrones, an effect attributed to rotation. In this paper, we provide the first characterization of this effect in young (<20 Myr) clusters. We determine ages for four young massive clusters (2 Large Magellanic Cloud and 2 Galactic) by three different methods: using the brightest single turn-off (TO) star; using the luminosity function (LF) of the TO; and by using the lowest L-bol red supergiant (RSG). The age found using the cluster TO is consistently younger than the age found using the lowes...
Add to ORKG