High Proper Motion Discoveries from the UKIRT Hemisphere Survey
Abstract
We used the third data release of the UKIRT Hemisphere Survey to locate previously unrecognized high proper motion objects. We identify a total of 127 new discoveries with total proper motions 300 mas yr. A significant fraction of these sources with counterparts in the Gaia DR3 catalog are found to be distant (100 pc) low-mass stars, where their large tangential velocities and placement on color-magnitude diagrams suggest that they are likely low-metallicity M-type subdwarfs. Optical spectroscopy is used to confirm the low-mass and low-metallicity for two such sources. Using available optical and infrared photometry, we estimate the spectral type for all non-Gaia sources and find 10 likely late-M dwarfs, 15 objects with colors most consistent with L-type dwarfs, and 9 possible T-type dwarfs. Follow-up spectroscopy is needed to confirm spectral types and further characterize these new discoveries.
Keywords
Cite
@article{arxiv.2509.22605,
title = {High Proper Motion Discoveries from the UKIRT Hemisphere Survey},
author = {Wings Zhang and Adam C. Schneider and Thomas P. Bickle and Adam J. Burgasser and Emma Softich and Federico Marocco and Daniella Bardalez Gagliuffi and Jacqueline K. Faherty and Aaron M. Meisner and J. Davy Kirkpatrick and Marc J. Kuchner and Martin Kabatnik and Frank Kiwy and Arttu Sainio and Jörg Schümann and Karl Selg-Mann and Nikolaj Stevnbak Andersen and Bruce Baller and Paul Beaulieu and John Bell and Dan Caselden and Guillaume Colin and Alexandru Dereveanco and Christoph Frank and Konstantin Glebov and Léopold Gramaize and Leslie K. Hamlet and David W. Martin and William Pendrill and Stéphane Perlin and Andres Stenner and Christopher Tanner and Melina Thévenot and Vinod Thakur and Nikolaj Stevnbak Andersen},
journal= {arXiv preprint arXiv:2509.22605},
year = {2025}
}
Comments
Accepted to AJ