The Hubble Space TelescopeUV Legacy Survey of Galactic Globular Clusters – V. Constraints on formation scenarios
By A. Renzini, F. D’Antona, Santi Cassisi, I. King, A. Milone, P. Ventura, Jay Anderson, L. Bedin, Andrea Bellini, T. M. Brown and 10 more. 2015
224 citations recorded by the source corpus.
We build on the evidence provided by our Legacy Survey of Galactic globular clusters (GC) to submit to a crucial test four scenarios currently entertain ed for the formation of multiple stellar generations in GCs. The observational constraints on multiple generations to be fulfilled are manifold, including GC specificity, ubiquity, variety, predominance, discreteness, supernova avoidance, p-capture processing, helium enrichment and mass budget. We argue that scenarios appealing to supermassive stars, fast rotating m assive stars and massive interactive binaries violate in an irreparable fashion two or more among such constraints. Also the scenario appealing to AGB stars as producers of the material for next generation stars encounters severe diffi culties, specifically concerning the mass budget problem an d the detailed chemical composition of second generation stars. We qualitatively explore ways possibly allowing one to save the AGB scenario, specifically appealing to a possible revis ion of the cross section of a critical reaction rate destroying sodium, or alternative ly by a more extensive exploration of the vast parameter space controlling the evolutionary behavior of AGB stellar models. Still, we cannot ensure success for these efforts and totally new scenarios may have to be invented to understand how GCs formed in the early Universe.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/2b148eb6b4e6825c14aa124b4622443e6faa209c
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In Astronomy and Astrophysics
- Michael Hilker
- Andrea Bellini
- A. Sollima
- H. Baumgardt
- S. Aarseth
- J. Kruijssen
- Pavel Kroupa
- Eugene O. Vasiliev
In Nuclear and High Energy Physics
Citations in the corpus
- The Hubble Space Telescope UV Legacy Survey of Galactic globular clusters – IX. The Atlas of multiple stellar populations (2016, unknown): “In Paper IV of this series we provided accurate determination of the GC helium abundance and ages of stellar populations in NGC 6352 (Nardiello et al. 2015a), while in Paper V we have exploited the first results from our survey to set constraints on the formation scenarios (Renzini et al. 2015).”
- Mean proper motions, space orbits, and velocity dispersion profiles of Galactic globular clusters derived fromGaiaDR2 data (2018, background): “…the tension between the large fraction of second generation stars seen in globular clusters and the much smaller fractions expected based on the yields of massive stars (Bastian & Lardo 2015; Renzini et al. 2015), since with fewer low-mass stars present initially, a larger fraction can be polluted.”