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CN Anomalies in the Halo System

Published online by Cambridge University Press:  05 March 2015

Daniela Carollo
Daniela Carollo*
Affiliation:
Dept. of Physics and Astronomy - Astronomy Astrophysics and Astrophotonic Research Center Macquarie University - North Ryde, 2109, NSW, Australia email: [email protected] INAF - Astronomical Observatory of Turin - Italy
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Abstract

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I present an evaluation of the kinematic properties of halo red giants thought to have formed in globular clusters based on the strength of their UV/blue CN and CH absorption features. The sample has been selected from the catalog of Martell et al. (2011). The orbital parameters of CN-strong halo stars are compared to those of the inner and outer halo populations, and to the orbital parameters of globular clusters with well-studied Galactic orbits. It has been found that both the clusters and the CN-strong field stars exhibit kinematic and orbital properties similar to the inner halo population, indicating that globular clusters could be a significant source of inner halo field stars, and suggesting that both globular clusters and CN-strong stars could belong primarily to the inner halo population of the Milky Way.

Keywords

Galaxy: haloGalaxy: formationGalaxy: structureGalaxy: kinematics and dynamicsGalaxy: stellar contentGlobular Clusters: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Highlights H16: Highlights of Astronomy , August 2012 , pp. 282 - 283
Copyright
Copyright © International Astronomical Union 2015 

References

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