3D Selection of 167 Substellar Companions to Nearby Stars
Article
Article Title | 3D Selection of 167 Substellar Companions to Nearby Stars |
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ERA Journal ID | 1058 |
Article Category | Article |
Authors | Feng, Fabo, Butler, R. Paul, Vogt, Steven S., Clement, Matthew S., Tinney, C. G., Cui, Kaiming, Aizawa, Masataka, Jones, Hugh R. A., Bailey, J., Burt, Jennifer, Carter B.D., Crane, Jeffrey D., Dotti, Francesco Flammini, Holden, Bradford, Ma, Bo, Ogihara, Masahiro, Oppenheimer, Rebecca, O'Toole, S. J., Shectman, Stephen A., Wittenmyer, Robert A., Wang, Sharon X., Wright, D. J. and Xuan, Yifan |
Journal Title | Astrophysical Journal Supplement Series |
Journal Citation | 262 (1) |
Article Number | 21 |
Number of Pages | 27 |
Year | 2022 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0067-0049 |
1538-4365 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-4365/ac7e57 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-4365/ac7e57 |
Abstract | We analyze 5108 AFGKM stars with at least five high-precision radial velocity points, as well as Gaia and Hipparcos astrometric data, utilizing a novel pipeline developed in previous work. We find 914 radial velocity signals with periods longer than 1000 days. Around these signals, 167 cold giants and 68 other types of companions are identified, through combined analyses of radial velocity, astrometry, and imaging data. Without correcting for detection bias, we estimate the minimum occurrence rate of the wide-orbit brown dwarfs to be 1.3%, and find a significant brown-dwarf valley around 40 M Jup. We also find a power-law distribution in the host binary fraction beyond 3 au, similar to that found for single stars, indicating no preference of multiplicity for brown dwarfs. Our work also reveals nine substellar systems (GJ 234 B, GJ 494 B, HD 13724 b, HD 182488 b, HD 39060 b and c, HD 4113 C, HD 42581 d, HD 7449 B, and HD 984 b) that have previously been directly imaged, and many others that are observable at existing facilities. Depending on their ages, we estimate that an additional 10-57 substellar objects within our sample can be detected with current imaging facilities, extending the imaged cold (or old) giants by an order of magnitude. |
Keywords | Astrophysics |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Funder | National Science Foundation |
Byline Affiliations | Shanghai Jiao Tong University, China |
Carnegie Institution for Science, United States | |
University of California, United States | |
University of New South Wales | |
University of Hertfordshire, United Kingdom | |
Jet Propulsion Laboratory, United States | |
Centre for Astrophysics | |
Xi’an Jiaotong-Liverpool University, China | |
University of Liverpool, United Kingdom | |
Heidelberg University, Germany | |
National Sun Yat-Sen University, Taiwan | |
American Museum of Natural History, United States | |
Macquarie University | |
Tsinghua University, China |
https://research.usq.edu.au/item/v4xwz/3d-selection-of-167-substellar-companions-to-nearby-stars
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