Discovery of 118 New Ultracool Dwarf Candidates Using Machine-learning Techniques
We present the discovery of 118 new ultracool dwarf candidates, discovered using a new machine-learning tool, named 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, a...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Astronomical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-3881/ad77d2 |
| _version_ | 1827064613441634304 |
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| author | Hunter Brooks Dan Caselden J. Davy Kirkpatrick Yadukrishna Raghu Charles A. Elachi Jake Grigorian Asa Trek Andrew Washburn Hiro Higashimura Aaron M. Meisner Adam C. Schneider Jacqueline K. Faherty Federico Marocco Christopher R. Gelino Jonathan Gagné Thomas P. Bickle Shih-Yun Tang Austin Rothermich Adam J. Burgasser Marc J. Kuchner Paul Beaulieu John Bell Guillaume Colin Giovanni Colombo Alexandru Dereveanco Deiby Pozo Flores Konstantin Glebov Leopold Gramaize Les Hamlet Ken Hinckley Martin Kabatnik Frank Kiwy David W. Martin Raúl F. Palma Méndez Billy Pendrill Lizzeth Ruiz John Sanchez Arttu Sainio Jörg Schümann Manfred Schonau Christopher Tanner Nikolaj Stevnbak Andres Stenner Melina Thévenot Vinod Thakur Nikita V. Voloshin Zbigniew Wȩdracki The Backyard Worlds: Planet 9 Collaboration |
| author_facet | Hunter Brooks Dan Caselden J. Davy Kirkpatrick Yadukrishna Raghu Charles A. Elachi Jake Grigorian Asa Trek Andrew Washburn Hiro Higashimura Aaron M. Meisner Adam C. Schneider Jacqueline K. Faherty Federico Marocco Christopher R. Gelino Jonathan Gagné Thomas P. Bickle Shih-Yun Tang Austin Rothermich Adam J. Burgasser Marc J. Kuchner Paul Beaulieu John Bell Guillaume Colin Giovanni Colombo Alexandru Dereveanco Deiby Pozo Flores Konstantin Glebov Leopold Gramaize Les Hamlet Ken Hinckley Martin Kabatnik Frank Kiwy David W. Martin Raúl F. Palma Méndez Billy Pendrill Lizzeth Ruiz John Sanchez Arttu Sainio Jörg Schümann Manfred Schonau Christopher Tanner Nikolaj Stevnbak Andres Stenner Melina Thévenot Vinod Thakur Nikita V. Voloshin Zbigniew Wȩdracki The Backyard Worlds: Planet 9 Collaboration |
| author_sort | Hunter Brooks |
| collection | DOAJ |
| description | We present the discovery of 118 new ultracool dwarf candidates, discovered using a new machine-learning tool, named 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 two 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. |
| first_indexed | 2025-03-19T22:49:56Z |
| format | Article |
| id | doaj.art-a7245ff2ae714ce8a73b7467348fb0e7 |
| institution | Directory Open Access Journal |
| issn | 1538-3881 |
| language | English |
| last_indexed | 2025-03-19T22:49:56Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj.art-a7245ff2ae714ce8a73b7467348fb0e72024-10-17T07:57:56ZengIOP PublishingThe Astronomical Journal1538-38812024-01-01168521110.3847/1538-3881/ad77d2Discovery of 118 New Ultracool Dwarf Candidates Using Machine-learning TechniquesHunter Brooks0https://orcid.org/0000-0002-5253-0383Dan Caselden1https://orcid.org/0000-0001-7896-5791J. Davy Kirkpatrick2https://orcid.org/0000-0003-4269-260XYadukrishna Raghu3https://orcid.org/0000-0001-9778-7054Charles A. Elachi4Jake Grigorian5https://orcid.org/0000-0002-2466-865XAsa Trek6https://orcid.org/0009-0008-3778-487XAndrew Washburn7https://orcid.org/0009-0005-6222-6026Hiro Higashimura8https://orcid.org/0009-0004-9088-7510Aaron M. Meisner9https://orcid.org/0000-0002-1125-7384Adam C. Schneider10https://orcid.org/0000-0002-6294-5937Jacqueline K. Faherty11https://orcid.org/0000-0001-6251-0573Federico Marocco12https://orcid.org/0000-0001-7519-1700Christopher R. Gelino13https://orcid.org/0000-0001-5072-4574Jonathan Gagné14https://orcid.org/0000-0002-2592-9612Thomas P. Bickle15https://orcid.org/0000-0003-2235-761XShih-Yun Tang16https://orcid.org/0000-0003-4247-1401Austin Rothermich17https://orcid.org/0000-0003-4083-9962Adam J. Burgasser18https://orcid.org/0000-0002-6523-9536Marc J. Kuchner19https://orcid.org/0000-0002-2387-5489Paul Beaulieu20John Bell21Guillaume Colin22https://orcid.org/0000-0002-7630-1243Giovanni Colombo23https://orcid.org/0000-0002-8295-542XAlexandru Dereveanco24Deiby Pozo Flores25Konstantin Glebov26Leopold Gramaize27https://orcid.org/0000-0002-8960-4964Les Hamlet28https://orcid.org/0000-0002-7389-2092Ken Hinckley29https://orcid.org/0000-0002-4733-4927Martin Kabatnik30https://orcid.org/0000-0003-4905-1370Frank Kiwy31https://orcid.org/0000-0001-8662-1622David W. Martin32Raúl F. Palma Méndez33Billy Pendrill34Lizzeth Ruiz35John Sanchez36Arttu Sainio37https://orcid.org/0000-0003-4864-5484Jörg Schümann38https://orcid.org/0000-0002-7587-7195Manfred Schonau39Christopher Tanner40Nikolaj Stevnbak41https://orcid.org/0000-0003-4714-3829Andres Stenner42Melina Thévenot43https://orcid.org/0000-0001-5284-9231Vinod Thakur44Nikita V. Voloshin45Zbigniew Wȩdracki46The Backyard Worlds: Planet 9 CollaborationDepartment of Astronomy and Planetary Science, Northern Arizona University , Flagstaff, AZ 86011, USA; NSF National Optical-Infrared Astronomy Research Laboratory , 950 N. Cherry Avenue, Tucson, AZ 85719, USADepartment of Astrophysics , American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, USAIPAC , Mail Code 100-22, Caltech, 1200 E. California Boulevard, Pasadena, CA 91125, USABackyard Worlds: Planet 9Seaver College, Pepperdine University , Malibu, CA 90263, USAUniversity of Southern California, University Park Campus , Los Angeles, CA 90089, USABackyard Worlds: Planet 9Backyard Worlds: Planet 9Earl of March Intermediate School , 4 The Pkwy, Kanata, ON K2K 1Y4, CanadaNSF National Optical-Infrared Astronomy Research Laboratory , 950 N. Cherry Avenue, Tucson, AZ 85719, USAUnited States Naval Observatory , Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, AZ 86005, USADepartment of Astrophysics , American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, USAIPAC , Mail Code 100-22, Caltech, 1200 E. California Boulevard, Pasadena, CA 91125, USAIPAC , Mail Code 100-22, Caltech, 1200 E. California Boulevard, Pasadena, CA 91125, USAPlanétarium de Montrál , Espace pour la Vie, 4801 av. Pierre-de Coubertin, Montréal, Québec, Canada; Trottier Institute for Research on Exoplanets, Université de Montréal , Département de Physique, C.P. 6128 Succ. Centre-ville, Montréal, QC H3C 3J7, CanadaBackyard Worlds: Planet 9; School of Physical Sciences, The Open University , Milton Keynes, MK7 6AA, UKDepartment of Physics and Astronomy, Rice University , 6100 Main Street, Houston, TX 77005, USA; Lowell Observatory , 1400 West Mars Hill Road, Flagstaff, AZ 86001, USADepartment of Astrophysics , American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, USA; Backyard Worlds: Planet 9; Department of Physics, Graduate Center, City University of New York , 365 5th Avenue, New York, NY 10016, USA; Department of Physics and Astronomy, Hunter College, City University of New York , 695 Park Avenue, New York, NY 10065, USADepartment of Astronomy & Astrophysics , UC San Diego, La Jolla, CA, USANASA Goddard Space Flight Center , Exoplanets and Stellar Astrophysics Laboratory, Code 667, Greenbelt, MD 20771, USABackyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9Backyard Worlds: Planet 9We present the discovery of 118 new ultracool dwarf candidates, discovered using a new machine-learning tool, named 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 two 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.https://doi.org/10.3847/1538-3881/ad77d2Brown dwarfsSubdwarf starsLow mass stars |
| spellingShingle | Hunter Brooks Dan Caselden J. Davy Kirkpatrick Yadukrishna Raghu Charles A. Elachi Jake Grigorian Asa Trek Andrew Washburn Hiro Higashimura Aaron M. Meisner Adam C. Schneider Jacqueline K. Faherty Federico Marocco Christopher R. Gelino Jonathan Gagné Thomas P. Bickle Shih-Yun Tang Austin Rothermich Adam J. Burgasser Marc J. Kuchner Paul Beaulieu John Bell Guillaume Colin Giovanni Colombo Alexandru Dereveanco Deiby Pozo Flores Konstantin Glebov Leopold Gramaize Les Hamlet Ken Hinckley Martin Kabatnik Frank Kiwy David W. Martin Raúl F. Palma Méndez Billy Pendrill Lizzeth Ruiz John Sanchez Arttu Sainio Jörg Schümann Manfred Schonau Christopher Tanner Nikolaj Stevnbak Andres Stenner Melina Thévenot Vinod Thakur Nikita V. Voloshin Zbigniew Wȩdracki The Backyard Worlds: Planet 9 Collaboration Discovery of 118 New Ultracool Dwarf Candidates Using Machine-learning Techniques The Astronomical Journal Brown dwarfs Subdwarf stars Low mass stars |
| title | Discovery of 118 New Ultracool Dwarf Candidates Using Machine-learning Techniques |
| title_full | Discovery of 118 New Ultracool Dwarf Candidates Using Machine-learning Techniques |
| title_fullStr | Discovery of 118 New Ultracool Dwarf Candidates Using Machine-learning Techniques |
| title_full_unstemmed | Discovery of 118 New Ultracool Dwarf Candidates Using Machine-learning Techniques |
| title_short | Discovery of 118 New Ultracool Dwarf Candidates Using Machine-learning Techniques |
| title_sort | discovery of 118 new ultracool dwarf candidates using machine learning techniques |
| topic | Brown dwarfs Subdwarf stars Low mass stars |
| url | https://doi.org/10.3847/1538-3881/ad77d2 |
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