Blue Straggler Stars: The Spectacular Population in M80

Preprint

15 April 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/9904196

Abstract

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.

Keywords

SPECTACULAR POPULATION
BLUE STRAGGLER STARS
STRAGGLER STARS
USING HST
M80 USING

All Related Versions

Version 1, 1999-04-15, ArXiv
Published version: The Astrophysical Journal, 522 (2), 983.

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