AB Doradus moving group

AB Doradus moving group

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.cite journal
last=Ortega | first=V. G.
coauthors=Jilinski, E.; de la Reza, R.; Bazzanella, B.
title=On the common origin of the AB Doradus moving group and the Pleiades cluster
journal=Monthly Notices of the Royal Astronomical Society
year=2007 | volume=377 | iaaue=1 | pages=441–445
url=http://www.ingentaconnect.com/content/bsc/mnr/2007/00000377/00000001/art00040
doi=10.1111/j.1365-2966.2007.11614.x
accessdate=2008-03-04 ] The average space velocityof 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 parsecsacross.cite journal
last=Zuckerman | first=B. | coauthors=Song, Inseok
title=The AB Doradus Moving Group
journal=The Astrophysical Journal
year=2004 | volume=613 | pages=L65–L68
url=http://www.journals.uchicago.edu/doi/abs/10.1086/425036
doi=10.1086/425036 | accessdate=2008-03-04 ]

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. [cite journal
last=Hormuth | first=F.
coauthors=Brandner, W.; Hippler, S.; Janson, M.; Henning, T.
title=Direct imaging of the young spectroscopic binary HD 160934
journal=Astronomy and astrophysics
year=2007 | volume=463 | issue=2 | pages=707–711
url=http://arxiv.org/abs/astro-ph/0612158
accessdate=2008-03-04
doi=10.1051/0004-6361:20066765 ]

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