The Fraction of Runaway OB Stars in the SMC Field

Details The Fraction of Runaway OB Stars in the SMC Field The Fraction of Runaway OB Stars in the SMC Field

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..246...63l&link_type=abstract

Dynamical Evolution of Dense Stellar Systems, Proceedings of the International Astronomical Union, IAU Symposium, Volume 246, p.

Statistics

1

Binaries: General, Stars: Early-Type, Stars: Kinematics, Stars: Statistics, Open Clusters And Associations: General, Galaxies Individual (Magellanic Clouds), Galaxies: Stellar Content

Scientific paper

The fraction of field OB stars that originate from clusters can help probe the dynamical evolution of clusters. Field stars represent a significant fraction (20-30%) of the OB population in galaxies, and estimates for the fraction of field OB stars that are runaways range from the classical value of <10% (Blaauw 1961) to contemporary results suggesting >90% (de Wit et al. 2005). We obtained Magellan IMACS observations on the kinematics of field OB stars in the SMC to examine the line-of-sight velocities of this population. Using these observations, we will estimate the fraction of runaways to serve as a probe of cluster evolution.

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