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Title: SUPERNOVAE AND THEIR EXPANDING BLAST WAVES DURING THE EARLY EVOLUTION OF GALACTIC GLOBULAR CLUSTERS

Our arguments deal with the early evolution of Galactic globular clusters and show why only a few of the supernovae (SNe) products were retained within globular clusters and only in the most massive cases (M ≥ 10{sup 6} M{sub ⊙}), while less massive clusters were not contaminated at all by SNe. Here, we show that SN blast waves evolving in a steep density gradient undergo blowout and end up discharging their energy and metals into the medium surrounding the clusters. This inhibits the dispersal and the contamination of the gas left over from a first stellar generation. Only the ejecta from well-centered SNe that evolve into a high-density medium available for a second stellar generation (2SG) in the most massive clusters would be retained. These are likely to mix their products with the remaining gas, eventually leading in these cases to an Fe-contaminated 2SG.
Authors:
;  [1] ;  [2] ;  [3]
  1. Instituto Nacional de Astrofísica Óptica y Electrónica, AP 51, 72000 Puebla, México (Mexico)
  2. Instituto de Astrofísica de Canarias (Spain)
  3. INAF—Astronomical Observatory of Collurania, via M. Maggini, I-64100 Teramo (Italy)
Publication Date:
OSTI Identifier:
22518679
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 814; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DENSITY; GALAXIES; HYDRODYNAMICS; IRON; SHOCK WAVES; STAR CLUSTERS; STAR EVOLUTION; SUPERNOVAE