Blue straggler stars and other complications in star clusters

L. Deng, Y. Xin, C. Y. Li, R. de Grijs

Research output: Contribution to journalConference paper

Abstract

Blue straggler stars (BSSs), among other exotic native components in star clusters, are usually descendents of mass exchanging binaries, or the results of coalescence or even direct collisions. Being bluer and more luminous than the cluster's turn-off on the colormagnitude diagram (CMD), they are understood as rejuvenation of evolved stars due to dynamical processes, and can resemble core Hydrogen burning main sequence stars at their current locations. Also due to the locations on the CMD, BSSs contribute non-negligible extra light to the blue part of total integrated spectra of the host clusters compared to the single stellar population (SSP) model corresponding to the clusters' age and metallicity. In this talk, I will cover a few topics on BSSs and our recent work on stellar contents in star clusters.

Original languageEnglish
Pages (from-to)489-492
Number of pages4
JournalMemorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society
Volume87
Issue number4
Publication statusPublished - 2016
EventThe Cosmic-Lab conference: star clusters as cosmic laboratories for astrophysics, dynamics and fundamental physics - MODEST 16 - Bologna, Italy
Duration: 18 Apr 201622 Apr 2016

Keywords

  • Stars: blue stragglers
  • Stars: binaries: general
  • Galaxy: globular clusters general
  • Galaxy: open clusters and associations: general

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