AB Doradus moving group
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AB Doradus Moving Group is a group of about 30 associated stars that are moving through space together with the star AB Doradus. A moving group is distinguished by its members having about the same age, composition (or metallicity) and motion through space. Hence they most likely formed in the same location.
This group is located about 20 parsecs from the Earth and is the closest known co-moving group. It has estimated age of either 50 million or 119 million years.[1] The average space velocity of this group has components of U = −8, V = −27 and W = −14 km/s. About 10 of these stars form a nuclear group within a volume roughly 10 parsecs across.[2]
The proximity of this moving group makes it useful for studies of shared stellar properties, as well as detection of companions through direct imaging. These can be used for refinement of young stellar models, for example.[3]
[edit] References
- ^ Ortega, V. G.; Jilinski, E.; de la Reza, R.; Bazzanella, B. (2007). "On the common origin of the AB Doradus moving group and the Pleiades cluster". Monthly Notices of the Royal Astronomical Society 377: 441-445. doi:.
- ^ Zuckerman, B.; Song, Inseok (2004). "The AB Doradus Moving Group". The Astrophysical Journal 613: L65–L68. doi:.
- ^ Hormuth, F.; Brandner, W.; Hippler, S.; Janson, M.; Henning, T. (2007). "Direct imaging of the young spectroscopic binary HD 160934". Astronomy and astrophysics 463 (2): 707-711.
