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Environmental Effects on the Globular Cluster Blue Straggler Population: a Statistical Approach

Published online by Cambridge University Press:  01 September 2007

Alessia Moretti ,
Francesca De Angeli  and
Giampaolo Piotto
Alessia Moretti
Affiliation:
Dipartimento di Astronomia - Università di Padova, Vicolo dell'Osservatorio 3, I-35122 Padova email: alessia.moretti@unipd.it INAF - Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, I-35122 Padova
Francesca De Angeli
Affiliation:
Institute of Astronomy, Madingley Road, CB3 0HA Cambridge, UK
Giampaolo Piotto
Affiliation:
Dipartimento di Astronomia - Università di Padova, Vicolo dell'Osservatorio 3, I-35122 Padova email: alessia.moretti@unipd.it
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Abstract

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Blue stragglers stars (BSS) constitute an ubiquitous population of objects whose origin involves both dynamical and stellar evolution. We took advantage of the homogeneous sample of 56 Galactic globular clusters observed with WFPC2/HST by Piotto et al. (2002) to investigate the environmental dependence of the BSS formation mechanisms. We explore possible monovariate relations between the frequency of BSS (divided in different subsamples according to their location with respect to the parent cluster core radius and half mass radius) and the main parameters of their host GC. We also performed a Principal Component Analysis to extract the main parent cluster parameters which characterise the BSS family.

Keywords

stars:blue stragglers-luminosity function–Hertzsprung-Russell diagram- globular clusters:general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S246: Dynamical Evolution of Dense Stellar Systems , September 2007 , pp. 369 - 370
Copyright
Copyright © International Astronomical Union 2008

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