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NEOWISE-R Observation of the Coolest Known Brown Dwarf

Wright, Edward L. and Mainzer, Amy and Kirkpatrick, J. Davy and Masci, Frank and Cushing, Michael C. and Bauer, James and Fajardo-Acosta, Sergio and Gelino, Christopher R. and Beichman, Charles A. and Skrutskie, M. F. and Grav, T. and Einsenhardt, Peter R. M. and Cutri, Roc (2014) NEOWISE-R Observation of the Coolest Known Brown Dwarf. Astronomical Journal, 148 (5). Art. No. 82. ISSN 0004-6256. https://resolver.caltech.edu/CaltechAUTHORS:20141205-090511926

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Abstract

The Wide-field Infrared Survey Explorer (WISE) spacecraft has been reactivated as NEOWISE-R to characterize and search for near-Earth objects. The brown dwarf WISE J085510.83–071442.5 has now been re-observed by NEOWISE-R, and we confirm the results of Luhman, who found a very low effective temperature (≈250 K), a very high proper motion (8."1 ± 0."1 yr^(–1)), and a large parallax (454 ± 45 mas). The large proper motion has separated the brown dwarf from the background sources that influenced the 2010 WISE data, allowing a measurement of a very red WISE color of W1 – W2 >3.9 mag. A re-analysis of the 2010 WISE astrometry using only the W2 band, combined with the new NEOWISE-R 2014 position, gives an improved parallax of 448 ± 33 mas and a proper motion of 8."08 ± 0."05 yr^(–1). These are all consistent with values from Luhman.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0004-6256/148/5/82DOIArticle
http://arxiv.org/abs/1405.7350arXivDiscussion Paper
ORCID:
AuthorORCID
Wright, Edward L.0000-0001-5058-1593
Kirkpatrick, J. Davy0000-0003-4269-260X
Masci, Frank0000-0002-8532-9395
Cushing, Michael C.0000-0001-7780-3352
Fajardo-Acosta, Sergio0000-0001-9309-0102
Beichman, Charles A.0000-0002-5627-5471
Grav, T.0000-0002-3379-0534
Cutri, Roc0000-0002-0077-2305
Additional Information:© 2014 American Astronomical Society. Received 2014 May 27; accepted 2014 July 21; published 2014 September 26. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This publication makes use of data products from NEOWISE, which is a project of the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. Facilities: WISE, Keck:II (NIRC2-LGSAO)
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
NASA/JPL/CaltechUNSPECIFIED
Subject Keywords: astrometry; brown dwarfs; infrared: stars; solar neighborhood; stars: individual (WISE J085510.83–071442.5); stars: low-mass
Issue or Number:5
Record Number:CaltechAUTHORS:20141205-090511926
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141205-090511926
Official Citation:NEOWISE-R Observation of the Coolest Known Brown Dwarf Edward L. Wright et al. 2014 The Astronomical Journal 148 82
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52421
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:05 Dec 2014 17:25
Last Modified:24 Feb 2020 10:30

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