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25 April 2024 |
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CWISEP J193518.59$-$154620.3: An Extremely Cold Brown Dwarf in the Solar Neighborhood Discovered with CatWISE | | Federico Marocco
; Dan Caselden
; Aaron M. Meisner
; J. Davy Kirkpatrick
; Edward L. Wright
; Jacqueline K. Faherty
; Christopher R. Gelino
; Peter R. M. Eisenhardt
; John W. Fowler
; Michael C. Cushing
; Roc M. Cutri
; Nelson Garcia
; Thomas H. Jarrett
; Renata Koontz
; Amanda Mainzer
; Elijah J. Marchese
; Bahram Mobasher
; David J. Schlegel
; Daniel Stern
; Harry I. Teplitz
; | | Date: |
21 Jun 2019 | | Abstract: | We present the discovery of an extremely cold, nearby brown dwarf in the
solar neighborhood, found in the CatWISE catalog (Eisenhardt et al., in prep.).
Photometric follow-up with Spitzer reveals that the object, CWISEP
J193518.59-154620.3, has ch1$-$ch2 = 3.24$,pm,$0.31 mag, making it one of
the reddest brown dwarfs known. Using the Spitzer photometry and the polynomial
relations from Kirkpatrick et al. (2019) we estimate an effective temperature
in the $sim$270--360 K range, and a distance estimate in the 5.6$-$10.9 pc
range. We combined the WISE, NEOWISE, and Spitzer data to measure a proper
motion of $mu_alpha cos delta = 337pm69$ mas yr$^{-1}$, $mu_delta =
-50pm97$ mas yr$^{-1}$, which implies a relatively low tangential velocity in
the range 7$-$22 km s$^{-1}$. | | Source: | arXiv, 1906.8913 | | Services: | Forum | Review | PDF | Favorites | |
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