We present the discovery of 118 new ultracool dwarf candidate stars discovered using a new machine learning tool called SMDET applied to a time series of images from the Wide-field Infrared Survey Explorer.
We collected photometric and astrometric data to estimate the spectral type, distance, and tangential velocity of each candidate. The sample contains 28 M dwarfs, 64 L dwarfs, and 18 T dwarfs with a photometrically estimated spectral class distribution.
We also identified one T-type subdwarf candidate, two extreme T-type subdwarf candidates, and two young ultracool dwarf candidates. Five objects did not have enough photometric data to make inferences.
To validate the inferred spectral types, spectra of two objects were collected and confirmed the spectral types of T5 (inferred T5) and T3 (inferred T4), demonstrating the effectiveness of machine learning tools as a novel large-scale discovery method.
Hunter Brooks, Dan Caselden, J. Davey Kirkpatrick, Yadukrishna Raghu, Charles Elachi, Jake Grigoryan, Asa Trek, Andrew Washburn, Hiro Higashimura, Aaron Meisner, Adam Schneider, Jacqueline Faherty, Federico Marrocco, Christopher Gelinho, Jonathan Gagne, Thomas Bickle, Shiyun Tan, Austin Rosamich, Adam Burgasser, Mark J. Kushner, Paul Beaulieu, John Bell, Guillaume Colin, Giovanni Colon Bo, Alexandre Derevianko, Davy Flores, Konstantin Glebov, Leopold Grameis, Les Hamlett, Ken Hinckley, Martin Kabatnik, Frank Kiwi, David Martin, Raul Palma, William Pendrill, Lizeth Ruiz, John Sanchez, Artu Sainio, Jörg Schumann, Manfred Schönau, Christopher Tanner, Nikolaj Stevenback-Andersen, Andres Stenner, Melina Thevenot, Vinod Thakur, Nikita Voloshin, Zbigniew Wedrazki
Comments: 14 pages, 8 figures, 2 tables, 1 extended table, accepted by the American Astronomical Journal
Subjects: Solar and Stellar Astrophysics (astro-ph.SR), Terrestrial and Planetary Astrophysics (astro-ph.EP), Galactic Astrophysics (astro-ph.GA), Instrumentation and Methods for Astrophysics (astro-ph.IM)
Source: arXiv:2408.14447 [astro-ph.SR] (or arXiv:2408.14447v1 [astro-ph.SR] For this version
https://doi.org/10.48550/arXiv.2408.14447
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Submission History
Source: Hunter Brooks
[v1] Monday, August 26, 2024 17:37:38 UTC (6,979 KB)
https://arxiv.org/abs/2408.14447
Astrobiology, astrochemistry