The formation of globular clusters as a case of overcooling
Date Issued
2022
Author(s)
Abstract
Driven by recent observational findings, we select massive interactive
binaries as the most suitable among the existing candidates for producing the
chemical patterns typical of multiple populations of Galactic globular
clusters. Still, to avoid supernova contamination we are further driven to
endorse the notion that above a critical mass stars fail to produce supernova
events, but rather eventually sink into black holes without ejecting much
energy and heavy metals. This assumption has the attractive implication of
suppressing star formation feedback for some 5--10 million years, in practice
leading to runaway star formation, analog to {\it overcooling} that in absence
of feedback would have turned most baryons into stars in the early Universe.
Under such conditions, multiple episodes of stars formation, incorporating
binary star ejecta from previous episodes, appear to be unavoidable, thus
accounting for the ubiquity of the multiple population phenomenon in globular
clusters.
Volume
513
Issue
2
Start page
2111
Issn Identifier
0035-8711
Rights
open.access
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