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Browsing University of Hertfordshire by Author "Pokorny, R.S."
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Benchmark low-mass objects in Moving Groups
Galvez-Ortiz, M. C.; Kuznetsov, M.; Clarke, J. R. A.; Pavlenko, Ya. V.; Pinfield, D.J.; Jones, H.R.A.; Jenkins, J. S.; Barnes, J.; Burningham, B.; Day-Jones, A. C.; Martin, E. L.; Perez, A. E. Garcia; Pokorny, R.S. (EDP Sciences, 2013)In order to compile a sample of ultracool dwarfs that will serve as benchmarks for testing theoretical formation and evolutionary models, we selected low-mass cool (>M7) objects that are potentially members of five known ... -
Discovery of the first L dwarf plus giant binary system and eight other ultracool dwarfs in wide binaries
Zhang, Z.; Pinfield, D.J.; Day-Jones, A.C.; Burningham, B.; Jones, H.R.A.; Yu, S.; Jenkins, J.S.; Han, Z.; Galvez-Ortiz, M.C.; Gallardo, J.; Garcia Perez, A.E.; Weights, D.; Tinney, C.G.; Pokorny, R.S. (2010)We identify 806 ultracool dwarfs (of which 34 are newly discovered L dwarfs) from their Sloan Digital Sky Survey (SDSS) riz photometry and obtain proper motions through cross-matching with the United Kingdom Infrared ... -
The Liverpool-Edinburgh high proper motion catalogue
Pokorny, R.S.; Jones, H.R.A.; Hambly, N.C.; Pinfield, D.J. (2004-07) -
The Liverpool-Edinburgh high proper motion survey
Pokorny, R.S.; Jones, H.R.A.; Hambly, N.C. (2003-01) -
New nearby, bright southern ultracool dwarfs
Kendall, T.R.; Jones, H.R.A.; Pinfield, D.J.; Pokorny, R.S.; Folkes, S.; Weights, D.; Jenkins, J.S.; Mauron, N. (2007) -
A search for southern ultracool dwarfs in young moving groups
Clarke, J.R.A.; Pinfield, D.J.; Galvez-Ortiz, M.C.; Jenkins, J.S.; Burningham, B.; Deacon, Niall; Jones, H.R.A.; Pokorny, R.S.; Barnes, J.R.; Day-Jones, A.C. (2010)We associate 132 low-mass ultracool dwarfs in the southern hemisphere as candidate members of five moving groups (MGs) using photometric and astrometric selection techniques. Of these objects, we present high-resolution ... -
Spectroscopy and kinematics of low-mass members of young moving groups
Galvez-Ortiz, M. C.; Clarke, J.R.A.; Pinfield, D.J.; Jenkins, J. S.; Folkes, S. L.; Garcia Perez, A. E.; Day-Jones, A.C.; Burningham, B.; Jones, H.R.A.; Barnes, J. R.; Pokorny, R.S. (2010)We study a target sample of 68 low-mass objects (with spectral types in the range M4.5–L1) previously selected via photometric and astrometric criteria, as possible members of five young moving groups: the Local Association ... -
Ultra-cool dwarfs: new discoveries, proper motions and improved spectral typing from SDSS and 2MASS photometric colors
Zhang, Z.H.; Pokorny, R.S.; Jones, H.R.A.; Pinfield, D.J.; Chen, P.S.; Han, Z.; Chen, D.; Galvez-Ortiz, M.C.; Burningham, B. (2009)