Observations of Blue Straggler Stars in Globular Clusters

Details Observations of Blue Straggler Stars in Globular Clusters Observations of Blue Straggler Stars in Globular Clusters

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..14e...4f&link_type=abstract

Modelling Dense Stellar Systems, 26th meeting of the IAU, Joint Discussion 14, 22-23 August 2006, Prague, Czech Republic, JD14,

Computer Science

Scientific paper

Blue Stragglers stars (BSS) define a sparsely populated sequence extending to higher luminosity than the turn-off (TO) point of normal main sequence (MS) stars in the color magnitude diagrams (CMDs) of stellar aggregates, thus mimicking a rejuvenated (more massive) stellar population. The nature of these stars has been a puzzle for many years and their formation mechanism is not completely understood yet. Two mechanisms have been proposed to produce BSS: (1) the mass transfer in binary systems and (2) the merger of two stars induced by stellar interactions. In this talk I briefly review the main properties of BSS in Globular Clusters (GCs) in the light of the most recent photometric and spectroscopic observations. These results, combined with dynamical simulations, indicate that both the suggested formation mechanisms play an important role in the production of BSS in GCs.

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