TY - JOUR
T1 - JWST Observations of the Enigmatic Y-Dwarf WISE 1828+2650. I. Limits to a Binary Companion
AU - De Furio, Matthew
AU - Lew, Ben
AU - Beichman, Charles
AU - Roellig, Thomas
AU - Bryden, Geoffrey
AU - Ciardi, David
AU - Meyer, Michael
AU - Rieke, Marcia
AU - Greenbaum, Alexandra
AU - Leisenring, Jarron
AU - Llop-Sayson, Jorge
AU - Ygouf, Marie
AU - Albert, Loic
AU - Boyer, Martha
AU - Eisenstein, Daniel
AU - Hodapp, Klaus
AU - Horner, Scott
AU - Johnstone, Doug
AU - Kelly, Doug
AU - Misselt, Karl
AU - Rieke, George
AU - Stansberry, John
AU - Young, Erick
N1 - Funding Information:
This work was authored by employees of Caltech/IPAC under Contract No. 80GSFC21R0032 with the National Aeronautics and Space Administration.
Funding Information:
Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.
Funding Information:
We wish to thank Davy Kirkpatrick for valuable discussions about WISE 1828. Some of the research described in this publication was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. M. De Furio benefited from support from JPL’s Strategic University Research Partnership (SURP). Doug Johnstone is supported by NRC Canada and by an NSERC Discovery Grant. L.A. acknowledges support by the Canadian Space Agency under contract 9F052-170914/001/MTB.
Funding Information:
We must first acknowledge the many years of effort by thousands of scientists, engineers, and administrators who made JWST such a dramatic success, exceeding many of its most important requirements. This international collaboration should be an inspiration to us all. The NIRCam team at the University of Arizona and Lockheed Martin’s Advanced Technology Center brought great skill, expertise, and dedication to realize the full power of this instrument. This work was supported by NASA through the JWST NIRCam project through contract No. NAS5-02195 (M. Rieke, University of Arizona, PI). T.R. would like to acknowledge the support of the NASA Science Mission Directorate under WBS 411672.07.05.05.03.01.
Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/5/1
Y1 - 2023/5/1
N2 - 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 μm) and long-wavelength (3-5 μm) 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.
AB - 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 μm) and long-wavelength (3-5 μm) 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.
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U2 - 10.3847/1538-4357/acbf1e
DO - 10.3847/1538-4357/acbf1e
M3 - Article
AN - SCOPUS:85159155066
SN - 0004-637X
VL - 948
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 92
ER -