The ages of L dwarfs

Details The ages of L dwarfs The ages of L dwarfs

2008-01-18

arxiv.org/abs/0801.2915v1

Astronomy and Astrophysics

Astrophysics

8 pages, 5 figures. Accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2008.12973.x

We present a new method to derive the age of young (<0.7 Gyr) L dwarfs based on their near-infrared photometry, colours, and distances. The method is based on samples of L dwarfs belonging to the Upper Sco association (5 Myr), the Alpha Per (85 Myr) and Pleiades (125 Myr) clusters, and the Ursa Major (400 Myr) and Hyades (625 Myr) moving groups. We apply our method to a number of interesting objects in the literature, including a known L dwarf binary, L dwarf companions, and spectroscopic members of the young sigma Orionis cluster.

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