Voltar
Artigo Revisado por pares
BIBTEX RIS

Blue Straggler Stars: The Spectacular Population in M80

1999; IOP Publishing; Volume: 522; Issue: 2 Linguagem: Inglês

10.1086/307700

ISSN

1538-4357

Autores

F. R. Ferraro, B. Paltrinieri, Robert T. Rood, Ben Dorman,

Tópico(s)

Galaxies: Formation, Evolution, Phenomena

Resumo

Using HST-WFPC2 observations in two ultraviolet (UV) filters (F225W and F336W) of the central region of the high density Galactic Globular cluster (GGC) M80 we have identified 305 Blue Straggler Stars (BSS) which represents the largest and most concentrated population of BSS ever observed in a GGC. We also identify the largest, clean sample of evolved BSS yet found. The high stellar density alone cannot explain the BSS, and we suggest that in M80 we are witnessing a transient dynamical state, during which stellar interactions are delaying the core-collapse process leading to an exceptionally large population of collisional-BSS.

Referência(s)