Kota, Tarun and Kirkpatrick, J. Davy and Caselden, Dan and Marocco, Federico and Schneider, Adam C. and Gagné, Jonathan and Faherty, Jacqueline K. and Meisner, Aaron M. and Kuchner, Marc J. and Casewell, Sarah and Kacholia, Kanishk and Bickle, Tom and Beaulieu, Paul and Colin, Guillaume and Hamlet, Leslie K. and Schümann, Jörg and Tanner, Christopher (2022) Discovery of 16 New Members of the Solar Neighborhood using Proper Motions from CatWISE2020. Astronomical Journal, 163 (3). Art. No. 116. ISSN 1538-3881. doi:10.3847/1538-3881/ac4713. https://resolver.caltech.edu/CaltechAUTHORS:20220207-195346844
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Abstract
In an effort to identify nearby and unusual cold objects in the solar neighborhood, we searched for previously unidentified moving objects using CatWISE2020 proper motion data combined with machine learning methods. We paired the motion candidates with their counterparts in 2MASS, UHS, and VHS. Then we searched for white dwarf, brown dwarf, and subdwarf outliers on the resulting color–color diagrams. This resulted in the discovery of 16 new dwarfs, including 2 nearby M dwarfs (<30 pc), a possible young L dwarf, a high-motion early-T dwarf, and 3 later-T dwarfs. This research represents a step forward in completing the census of the Sun's neighbors.
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| Additional Information: | © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 2021 September 12; revised 2021 December 9; accepted 2021 December 29; published 2022 February 7. CatWISE is funded by NASA under Proposal No. 16-ADAP16-0077 issued through the Astrophysics Data Analysis Program, and uses data from the NASA-funded WISE and NEOWISE projects. This research has made use of the NASA/IPAC Infrared Science Archive, which is funded by the National Aeronautics and Space Administration and operated by the California Institute of Technology. The Backyard Worlds: Planet 9 team would like to thank the many Zooniverse volunteers who have participated in this project, from providing feedback during the beta review stage to classifying flipbooks to contributing to the discussions on TALK. We would also like to thank the Zooniverse web development team for their work creating and maintaining the Zooniverse platform and the Project Builder tools. F.M. acknowledges support from grant 80NSSC20K0452 under the NASA Astrophysics Data Analysis Program. This research was supported by NASA grant 2017-ADAP17-0067. This material is based upon work supported by the National Science Foundation under grant No. 2007068, 2009136, and 2009177. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. This publication makes use of data products from the Two Micron All-Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. This publication makes use of data products from the Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE), which is a joint project of the Jet Propulsion Laboratory/California Institute of Technology and the University of Arizona. NEOWISE is funded by the National Aeronautics and Space Administration. Our research used data from the UHS collaboration and the VISTA Hemisphere Survey (VHS). We wish to thank the Student Astrophysics Society 18 for providing the resources that enabled the pairing of highschool and undergraduate students with practicing astronomers and advanced citizen scientists. We thank the anonymous referee for insightful suggestions that helped improve the manuscript. Facilities: WISE/NEOWISE - , 2MASS - , UKIRT - , VISTA - . Software: Astropy: Astropy Collaboration et al. (2013), Banyan Σ: Gagné et al. (2018), TOPCAT: Taylor (2005) XGBoost: Chen & Guestrin (2016), WiseView: Caselden et al. (2018). | ||||||||||||||||||||||||||||||||||
| Group: | Infrared Processing and Analysis Center (IPAC) | ||||||||||||||||||||||||||||||||||
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| Subject Keywords: | Brown dwarfs; Solar neighborhood; Proper motions; Two-color diagrams | ||||||||||||||||||||||||||||||||||
| Issue or Number: | 3 | ||||||||||||||||||||||||||||||||||
| Classification Code: | Unified Astronomy Thesaurus concepts: Brown dwarfs (185); Solar neighborhood (1509); Proper motions (1295); Two-color diagrams (1724) | ||||||||||||||||||||||||||||||||||
| DOI: | 10.3847/1538-3881/ac4713 | ||||||||||||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20220207-195346844 | ||||||||||||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20220207-195346844 | ||||||||||||||||||||||||||||||||||
| Official Citation: | Tarun Kota et al 2022 AJ 163 116 | ||||||||||||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||||||||||||
| ID Code: | 113324 | ||||||||||||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||||||||||
| Deposited By: | George Porter | ||||||||||||||||||||||||||||||||||
| Deposited On: | 08 Feb 2022 15:14 | ||||||||||||||||||||||||||||||||||
| Last Modified: | 08 Feb 2022 15:15 |
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