期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 378, 期 1, 页码 L24-L28出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1745-3933.2007.00312.x
关键词
stars : kinematics; stars : low-mass, brown dwarfs; open clusters and associations : individual : Ursa Major; open clusters and associations : individual : Hyades; galaxies : star clusters
We have used the moving cluster method to identify three L dwarfs and one T dwarf in the Ursa Major/Sirius moving group (age 400 Myr). Five L dwarfs and two T dwarfs are found to belong to the Hyades moving group (age 625 Myr). These L and T dwarfs define 400- and 625-Myr empirical isochrones, assuming that they have the same age. Moving group membership does not guarantee coevality.
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