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Published June 2016 | Submitted + Published
Journal Article Open

The AllWISE Motion Survey, Part 2


We use the AllWISE Data Release to continue our search for Wide-field Infrared Survey Explorer (WISE)-detected motions. In this paper, we publish another 27,846 motion objects, bringing the total number to 48,000 when objects found during our original AllWISE motion survey are included. We use this list, along with the lists of confirmed WISE-based motion objects from the recent papers by Luhman and by Schneider et al., and candidate motion objects from the recent paper by Gagné et al., to search for widely separated, common-proper-motion systems. We identify 1039 such candidate systems. All 48,000 objects are further analyzed using color–color and color–mag plots to provide possible characterizations prior to spectroscopic follow-up. We present spectra of 172 of these, supplemented with new spectra of 23 comparison objects from the literature, and provide classifications and physical interpretations of interesting sources. Highlights include: (1) the identification of three G/K dwarfs that can be used as standard candles to study clumpiness and grain size in nearby molecular clouds because these objects are currently moving behind the clouds, (2) the confirmation/discovery of several M, L, and T dwarfs and one white dwarf whose spectrophotometric distance estimates place them 5–20 pc from the Sun, (3) the suggestion that the Na i "D" line be used as a diagnostic tool for interpreting and classifying metal-poor late-M and L dwarfs, (4) the recognition of a triple system including a carbon dwarf and late-M subdwarf, for which model fits of the late-M subdwarf (giving [Fe/H] ≈ −1.0) provide a measured metallicity for the carbon star, and (5) a possible 24 pc distant K5 dwarf + peculiar red L5 system with an apparent physical separation of 0.1 pc.

Additional Information

© 2016 The American Astronomical Society. Received 2016 January 22; accepted 2016 March 23; published 2016 June 14. This publication makes use of data products from WISE, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory (JPL)/California Institute of Technology (Caltech), funded by the National Aeronautics and Space Administration (NASA). This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by JPL/Caltech, under contract with NASA. We are indebted to the SIMBAD database and the VizieR catalog access tool, provided by CDS, Strasbourg, France. This paper makes use of data from the Catalina Sky Survey, which is funded by the National Aeronautics and Space Administration under grant No. NNG05GF22G, issued through the Science Mission Directorate Near-Earth Objects Observations Program. J.D.K. acknowledges fruitful discussions with Richard Gray, Lee Rottler, and Patrick Lowrance. This research has benefitted from the M, L, T, and Y dwarf compendium housed at DwarfArchives.org. We thank Sébastien Lépine for providing published spectra of his subdwarf standards. Facilities: WISE, Hale(Double Spectrograph), Keck:I(LRIS), Keck:II(DEIMOS, NIRSPEC), IRTF(SpeX), Magellan:Baade(FIRE).

Attached Files

Published - apjs_224_2_36.pdf

Submitted - 1603.08040v2.pdf


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August 22, 2023
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