학술논문
JWST Observations of the Enigmatic Y Dwarf WISE 1828+2650: I. Limits to a Binary Companion
Document Type
Working Paper
Author
De Furio, Matthew; Lew, Ben W.; Beichman, Charles A.; Roellig, Thomas; Bryden, Geoffrey; Ciardi, David R.; Meyer, Michael R.; Rieke, Marcia J.; Greenbaum, Alexandra Z.; Leisenring, Jarron; Llop-Sayson, Jorge; Ygouf, Marie; Albert, Loïc; Boyer, Martha L.; Eisenstein, Daniel J.; Hodapp, Klaus W.; Horner, Scott; Johnstone, Doug; Kelly, Douglas M.; Misselt, Karl A.; Rieke, George H.; Stansberry, John A.; Young, Erick T.
Source
Subject
Language
Abstract
The Y-dwarf WISE 1828+2650 is one of the coldest known Brown Dwarfs with an effective temperature of $\sim$300 K. Located at a distance of just 10 pc, previous model-based estimates suggest WISE1828+2650 has a mass of $\sim$5-10 Mj, making it a valuable laboratory for understanding the formation, evolution and physical characteristics of gas giant planets. However, previous photometry and spectroscopy have presented a puzzle with the near-impossibility of simultaneously fitting both the short (0.9-2.0 microns) and long wavelength (3-5 microns) data. A potential solution to this problem has been the suggestion that WISE 1828+2650 is a binary system whose composite spectrum might provide a better match to the data. Alternatively, new models being developed to fit JWST/NIRSpec and MIRI spectroscopy might provide new insights. This article describes JWST/NIRCam observations of WISE 1828+2650 in 6 filters to address the binarity question and to provide new photometry to be used in model fitting. We also report Adaptive Optics imaging with the Keck 10 m telescope. We find no evidence for multiplicity for a companion beyond 0.5 AU with either JWST or Keck. Companion articles will present low and high resolution spectra of WISE 1828+2650 obtained with both NIRSpec and MIRI.
Comment: 15 pages, 9 figures, Accepted by ApJ on Feb. 21 2023
Comment: 15 pages, 9 figures, Accepted by ApJ on Feb. 21 2023