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CWISEP J193518.59–154620.3: An Extremely Cold Brown Dwarf in the Solar Neighborhood Discovered with CatWISE
- Marocco, Federico;
- Caselden, Dan;
- Meisner, Aaron M;
- Kirkpatrick, J Davy;
- Wright, Edward L;
- Faherty, Jacqueline K;
- Gelino, Christopher R;
- Eisenhardt, Peter RM;
- Fowler, John W;
- Cushing, Michael C;
- Cutri, Roc M;
- Garcia, Nelson;
- Jarrett, Thomas H;
- Koontz, Renata;
- Mainzer, Amanda;
- Marchese, Elijah J;
- Mobasher, Bahram;
- Schlegel, David J;
- Stern, Daniel;
- Teplitz, Harry I
- et al.
Published Web Location
https://arxiv.org/pdf/1906.08913.pdfNo data is associated with this publication.
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 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.