Meet the COG's
Martin Altmann (1), Marcio Catelan (2), Manuela Zoccali (2) ((1), Astronomisches Recheninstitut, Universitaet Heidelberg, Heidelberg, Germany,, (2) Pontificia Universidad Catolica de Chile, Santiago, Chile)
TL;DR
This paper presents a kinematic and chemical abundance analysis of local HBA stars, leading to the discovery of the Cometary Orbit Group and discussing future prospects with Gaia data.
Contribution
It introduces the COG as a new stellar group identified through combined kinematic and abundance analysis, highlighting a novel method for stellar population studies.
Findings
Identification of the Cometary Orbit Group (COG) among local HBA stars.
Discovery of stars with similar kinematics and abundances indicating common origin.
Discussion on the future of stellar population analysis with Gaia data.
Abstract
Kinematics combined with detailed element abundances provide the method of analysis of stellar populations using as much available information as possible, in contrast to other methods. Here we employ this technique on local HBA stars in an ongoing programme to search for omega Centauri debris among these objects, which led us to discover another group of stars with very similar kinematics and abundances, the Cometary Orbit Group (COG). We also comment on the future of this kind of undertaking in the Gaia era.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Space Technology and Applications