The Astrophysical Journal (Jan 2024)
Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE
- Federico Marocco,
- J. Davy Kirkpatrick,
- Adam C. Schneider,
- Aaron M. Meisner,
- Mark Popinchalk,
- Christopher R. Gelino,
- Jacqueline K. Faherty,
- Adam J. Burgasser,
- Dan Caselden,
- Jonathan Gagné,
- Christian Aganze,
- Daniella C. Bardalez Gagliuffi,
- Sarah L. Casewell,
- Chih-Chun Hsu,
- Rocio Kiman,
- Peter R. M. Eisenhardt,
- Marc J. Kuchner,
- Daniel Stern,
- Léopold Gramaize,
- Arttu Sainio,
- Thomas P. Bickle,
- Austin Rothermich,
- William Pendrill,
- Melina Thévenot,
- Martin Kabatnik,
- Giovanni Colombo,
- Hiro Higashimura,
- Frank Kiwy,
- Elijah J. Marchese,
- Nikolaj Stevnbak Andersen,
- Christopher Tanner,
- Jim Walla,
- Zbigniew Wędracki,
- The Backyard Worlds Collaboration
Affiliations
- Federico Marocco
- ORCiD
- IPAC, Mail Code 100-22, Caltech , 1200 E. California Boulevard, Pasadena, CA 91125, USA ; [email protected]
- J. Davy Kirkpatrick
- ORCiD
- IPAC, Mail Code 100-22, Caltech , 1200 E. California Boulevard, Pasadena, CA 91125, USA ; [email protected]; Backyard Worlds: Planet 9
- Adam C. Schneider
- ORCiD
- Backyard Worlds: Planet 9; United States Naval Observatory , Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, AZ 86005, USA
- Aaron M. Meisner
- ORCiD
- Backyard Worlds: Planet 9; NSF's National Optical-Infrared Astronomy Research Laboratory , 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- Mark Popinchalk
- ORCiD
- Department of Astrophysics, American Museum of Natural History , Central Park West at 79th Street, New York, NY 10024, USA; 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, USA
- Christopher R. Gelino
- ORCiD
- IPAC, Mail Code 100-22, Caltech , 1200 E. California Boulevard, Pasadena, CA 91125, USA ; [email protected]
- Jacqueline K. Faherty
- ORCiD
- Backyard Worlds: Planet 9; Department of Astrophysics, American Museum of Natural History , Central Park West at 79th Street, New York, NY 10024, USA
- Adam J. Burgasser
- ORCiD
- Department of Astronomy & Astrophysics, University of California San Diego , 9500 Gilman Dr, La Jolla, CA, 92093, USA
- Dan Caselden
- ORCiD
- Department of Astrophysics, American Museum of Natural History , Central Park West at 79th Street, New York, NY 10024, USA
- Jonathan Gagné
- ORCiD
- Planétarium de Montréal , 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, Canada
- Christian Aganze
- ORCiD
- Department of Astronomy & Astrophysics, University of California San Diego , 9500 Gilman Dr, La Jolla, CA, 92093, USA
- Daniella C. Bardalez Gagliuffi
- ORCiD
- Department of Physics & Astronomy, Amherst College , 25 East Drive, Amherst, MA 01003, USA
- Sarah L. Casewell
- ORCiD
- School of Physics and Astronomy, University of Leicester , University Road, Leicester, LE1 7RH, UK
- Chih-Chun Hsu
- ORCiD
- Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Northwestern University , 1800 Sherman Avenue, Evanston, IL, 60201, USA
- Rocio Kiman
- ORCiD
- Department of Astronomy, California Institute of Technology , Pasadena, CA 91125, USA
- Peter R. M. Eisenhardt
- Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USA
- Marc J. Kuchner
- ORCiD
- Backyard Worlds: Planet 9; Exoplanets and Stellar Astrophysics Laboratory, NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Daniel Stern
- ORCiD
- Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USA
- Léopold Gramaize
- ORCiD
- Backyard Worlds: Planet 9
- Arttu Sainio
- ORCiD
- Backyard Worlds: Planet 9
- Thomas P. Bickle
- ORCiD
- Backyard Worlds: Planet 9; School of Physical Sciences, The Open University , Milton Keynes, MK7 6AA, UK
- Austin Rothermich
- ORCiD
- Department of Astrophysics, American Museum of Natural History , Central Park West at 79th Street, New York, NY 10024, USA; 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, USA
- William Pendrill
- Backyard Worlds: Planet 9
- Melina Thévenot
- ORCiD
- Backyard Worlds: Planet 9
- Martin Kabatnik
- ORCiD
- Backyard Worlds: Planet 9
- Giovanni Colombo
- ORCiD
- Backyard Worlds: Planet 9
- Hiro Higashimura
- ORCiD
- Earl of March Intermediate School , 4 The Pkwy, Kanata, ON K2K 1Y4, Canada
- Frank Kiwy
- ORCiD
- Backyard Worlds: Planet 9
- Elijah J. Marchese
- Independent researcher, USA
- Nikolaj Stevnbak Andersen
- ORCiD
- Backyard Worlds: Planet 9
- Christopher Tanner
- Backyard Worlds: Planet 9
- Jim Walla
- Backyard Worlds: Planet 9
- Zbigniew Wędracki
- Backyard Worlds: Planet 9
- The Backyard Worlds Collaboration
- DOI
- https://doi.org/10.3847/1538-4357/ad3f1d
- Journal volume & issue
-
Vol. 967,
no. 2
p. 147
Abstract
We present the discovery of 13 new widely separated T dwarf companions to M dwarf primaries, identified using Wide-field Infrared Survey Explorer/NEOWISE data by the CatWISE and Backyard Worlds: Planet 9 projects (hereafter BYW). This sample represents an ∼60% increase in the number of known M + T systems, and allows us to probe the most extreme products of binary/planetary system formation, a discovery space made available by the CatWISE2020 catalog and the BYW effort. Highlights among the sample are WISEP J075108.79-763449.6, a previously known T9 thought to be old due to its spectral energy distribution, which was found by Zhang et al. (2021b) to be part of a common proper motion pair with L34-26 A, a well-studied young M3 V star within 10 pc of the Sun; CWISE J054129.32-745021.5 B and 2MASS J05581644-4501559 B, two T8 dwarfs possibly associated with the very fast-rotating M4 V stars CWISE J054129.32745021.5 A and 2MASS J05581644-4501559 A; and UCAC3 52-1038 B, which is among the widest late-T companions to main-sequence stars, with a projected separation of ∼7100 au. The new benchmarks presented here are prime JWST targets, and can help us place strong constraints on the formation and evolution theory of substellar objects as well as on atmospheric models for these cold exoplanet analogs.
Keywords
