Marocco, Federico and Caselden, Dan and Meisner, Aaron M. and Kirkpatrick, J. Davy and Wright, Edward L. and Faherty, Jacqueline K. and Gelino, Christopher R. and Eisenhardt, Peter R. M. and Fowler, John W. and Cushing, Michael C. and Cutri, Roc M. and Garcia, Nelson and Jarrett, Thomas H. and Koontz, Renata and Mainzer, Amanda and Marchese, Elijah J. and Mobasher, Bahram and Schlegel, David J. and Stern, Daniel and Teplitz, Harry I. (2019) CWISEP J193518.59–154620.3: An Extremely Cold Brown Dwarf in the Solar Neighborhood Discovered with CatWISE. Astrophysical Journal, 881 (1). Art. No. 17. ISSN 1538-4357. doi:10.3847/1538-4357/ab2bf0. https://resolver.caltech.edu/CaltechAUTHORS:20190807-094826727
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Abstract
We present the discovery of an extremely cold, nearby brown dwarf in the solar neighborhood, found in the CatWISE catalog. Photometric follow-up with Spitzer reveals that the object, CWISEP J193518.59–154620.3, has ch1–ch2 = 3.24 ± 0.31 mag, making it one of the reddest brown dwarfs known. Using the Spitzer photometry and the polynomial relations from Kirkpatrick et al. we estimate an effective temperature in the ~270–360 K range, and a distance estimate in the 5.6–10.9 pc range. We combined the WISE, NEOWISE, and Spitzer data to measure a proper motion of μ_α cos δ = 337±69 mas yr^(−1), μ_δ = −50 ± 97 mas yr^(−1), which implies a relatively low tangential velocity in the range 7–22 km s^(−1).
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| Additional Information: | © 2019 The American Astronomical Society. Received 2019 April 22; revised 2019 June 20; accepted 2019 June 20; published 2019 August 7. This research was partly carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. F.M. is supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, administered by Universities Space Research Association under contract with NASA. A.M.M. acknowledges support from Hubble Fellowship HST-HF2-51415.001-A. 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 work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. | ||||||||||||||||||||||||||
| Group: | Infrared Processing and Analysis Center (IPAC) | ||||||||||||||||||||||||||
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| Subject Keywords: | brown dwarfs – infrared: stars – proper motions – solar neighborhood | ||||||||||||||||||||||||||
| Issue or Number: | 1 | ||||||||||||||||||||||||||
| DOI: | 10.3847/1538-4357/ab2bf0 | ||||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20190807-094826727 | ||||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20190807-094826727 | ||||||||||||||||||||||||||
| Official Citation: | Federico Marocco et al 2019 ApJ 881 17 | ||||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||||
| ID Code: | 97695 | ||||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||
| Deposited By: | Tony Diaz | ||||||||||||||||||||||||||
| Deposited On: | 07 Aug 2019 17:00 | ||||||||||||||||||||||||||
| Last Modified: | 16 Nov 2021 17:33 |
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