Globular cluster formation and evolution in the context of cosmological galaxy assembly: open questions

摘要: We discuss some of the key open questions regarding formation and evolution globular clusters (GCs) during galaxy assembly within a cosmological framework. The current state art for both observations simulations is described, we briefly mention directions future research. oldest GCs have ages greater than or equal to 12.5 Gyr formed around time reionization. Resolved colour-magnitude diagrams Milky Way direct imaging lensed proto-GCs at z∼6 with James Webb Space Telescope (JWST) promise further insight. are known host multiple populations stars variations in their chemical abundances. Recently, such been detected ∼2 Gyr old compact, massive star clusters. This suggests common, single pathway high low redshift. shape initial mass function remains unknown; however, galaxies power-law favoured. Significant progress has made recently modelling GC context formation, success reproducing many observed GC-galaxy scaling relations.