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Globular Cluster Formation and Evolution in the Context of Cosmological Galaxy Assembly: Open Questions

Forbes, Duncan A., Bastian, Nate, Gieles, Mark, Crain, Robert A., Kruijssen, J. M. Diederik, Larsen, Søren S., Ploeckinger, Sylvia, Agertz, Oscar, Trenti, Michele, Ferguson, Annette M. N. , Pfeffer, Joel and Gnedin, Oleg Y. (2018) Globular Cluster Formation and Evolution in the Context of Cosmological Galaxy Assembly: Open Questions Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 474 (2210).

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

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Forbes, Duncan A.
Bastian, Nate
Crain, Robert A.
Kruijssen, J. M. Diederik
Larsen, Søren S.
Ploeckinger, Sylvia
Trenti, Michele
Ferguson, Annette M. N.
Pfeffer, Joel
Gnedin, Oleg Y.
Date : 14 February 2018
DOI : 10.1098/rspa.2017.0616
Copyright Disclaimer : © The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Uncontrolled Keywords : Astrophysics; Globular clusters: formation and evolution; Cosmology: galaxy formation
Related URLs :
Depositing User : Clive Harris
Date Deposited : 05 Feb 2018 15:58
Last Modified : 16 Jan 2019 19:07

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