Proper motions of field L and T dwarfs – II
Corresponding Author
S. L. Casewell
Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH
E-mail: [email protected]Search for more papers by this authorR. F. Jameson
Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH
Search for more papers by this authorM. R. Burleigh
Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH
Search for more papers by this authorCorresponding Author
S. L. Casewell
Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH
E-mail: [email protected]Search for more papers by this authorR. F. Jameson
Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH
Search for more papers by this authorM. R. Burleigh
Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH
Search for more papers by this authorABSTRACT
By using images taken with Wide Field Camera (WFCAM) on United Kingdom Infrared Telescope (UKIRT) and Son of ISAAC (SofI) on the New Technology Telescope (NTT) and combining them with Two Micron All Sky Survey (2MASS) we have measured proper motions for 126 L and T dwarfs in the dwarf archive. Two of these L dwarfs appear to have M dwarf common proper motion companions, and two also appear to be high-velocity dwarfs, indicating possible membership of the thick disc. We have also compared the motion of these 126 objects to that of numerous moving groups, and have identified new members of the Hyades, Ursa Major and Pleiades moving groups. These new objects, as well as those identified in Jameson et al. have allowed us to refine the L dwarf sequence for Ursa Major that was defined by Jameson et al.
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