Discovery of 118 New Ultracool Dwarf Candidates Using Machine Learning Techniques
Abstract
We present the discovery of 118 new ultracool dwarf candidates, discovered using a new machine learning tool, named \texttt{SMDET}, applied to time series images from the Wide-field Infrared Survey Explorer. We gathered photometric and astrometric data to estimate each candidate's spectral type, distance, and tangential velocity. This sample has a photometrically estimated spectral class distribution of 28 M dwarfs, 64 L dwarfs, and 18 T dwarfs. We also identify a T subdwarf candidate, two extreme T subdwarf candidates, and two candidate young ultracool dwarfs. Five objects did not have enough photometric data for any estimations to be made. To validate our estimated spectral types, spectra were collected for 2 objects, yielding confirmed spectral types of T5 (estimated T5) and T3 (estimated T4). Demonstrating the effectiveness of machine learning tools as a new large-scale discovery technique.
Keywords
Cite
@article{arxiv.2408.14447,
title = {Discovery of 118 New Ultracool Dwarf Candidates Using Machine Learning Techniques},
author = {Hunter Brooks and Dan Caselden and J. Davy Kirkpatrick and Yadukrishna Raghu and Charles Elachi and Jake Grigorian and Asa Trek and Andrew Washburn and Hiro Higashimura and Aaron Meisner and Adam Schneider and Jacqueline Faherty and Federico Marocco and Christopher Gelino and Jonathan Gagné and Thomas Bickle and Shih-yun Tang and Austin Rothermich and Adam Burgasser and Marc J. Kuchner and Paul Beaulieu and John Bell and Guillaume Colin and Giovanni Colombo and Alexandru Dereveanco and Deiby Flores and Konstantin Glebov and Leopold Gramaize and Les Hamlet and Ken Hinckley and Martin Kabatnik and Frank Kiwy and David Martin and Raul Palma and William Pendrill and Lizzeth Ruiz and John Sanchez and Arttu Sainio and JÖrg SchÜmann and Manfred Schonau and Christopher Tanner and Nikolaj Stevnbak Andersen and Andrés Stenner and Melina Thévenot and Vinod Thakur and Nikita Voloshin and Zbigniew Wedracki},
journal= {arXiv preprint arXiv:2408.14447},
year = {2024}
}
Comments
14 pages, 8 figures, 2 tables, extended table 1, accepted to Astronomical Journal