Details

Autor(en) / Beteiligte

• De Furio, Matthew
• Lew, Ben
• Beichman, Charles
• Roellig, Thomas
• Bryden, Geoffrey
• Ciardi, David
• Meyer, Michael
• Rieke, Marcia
• Greenbaum, Alexandra
• Leisenring, Jarron
• Llop-Sayson, Jorge
• Ygouf, Marie
• Albert, Loic
• Boyer, Martha
• Eisenstein, Daniel
• Hodapp, Klaus
• Horner, Scott
• Johnstone, Doug
• Kelly, Doug
• Misselt, Karl
• Rieke, George
• Stansberry, John
• Young, Erick

Titel

JWST Observations of the Enigmatic Y-Dwarf WISE 1828+2650. I. Limits to a Binary Companion

Ist Teil von

• The Astrophysical journal, 2023-05, Vol.948 (2), p.92

Ort / Verlag

Philadelphia: The American Astronomical Society

Erscheinungsjahr

2023

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• Abstract The Y-dwarf WISE 1828+2650 is one of the coldest known brown dwarfs with an effective temperature of ∼300 K. Located at a distance of just 10 pc, previous model-based estimates suggest WISE1828+2650 has a mass of ∼5–10 M J , 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 μ m) and long-wavelength (3–5 μ m) 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 six 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 I0 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 obtained with both NIRSpec and MIRI.