NEOWISE-R Observation of the Coolest Known Brown Dwarf
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.
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)Attached Files
Published - 1538-3881_148_5_82.pdf
Submitted - 1405.7350v2.pdf
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Additional details
- Eprint ID
- 52421
- Resolver ID
- CaltechAUTHORS:20141205-090511926
- NASA/JPL/Caltech
- Created
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2014-12-05Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)