J. Davy Kirkpatrick
The AllWISE Motion Survey and the Quest for Cold Subdwarfs
Kirkpatrick, J. Davy; Schneider, Adam; Fajardo-Acosta, Sergio; Gelino, Christopher R.; Mace, Gregory N.; Wright, Edward L.; Logsdon, Sarah E.; McLean, Ian S.; Cushing, Michael C.; Skrutskie, Michael F.; Eisenhardt, Peter R.; Stern, Daniel; Baloković, Mislav; Burgasser, Adam J.; Faherty, Jacqueline K.; Lansbury, George B.; Rich, J.A.; Skrzypek, Nathalie; Fowler, John W.; Cutri, Roc M.; Masci, Frank J.; Conrow, Tim; Grillmair, Carl J.; McCallon, Howard L.; Beichman, Charles A.; Marsh, Kenneth A.
Authors
Adam Schneider
Sergio Fajardo-Acosta
Christopher R. Gelino
Gregory N. Mace
Edward L. Wright
Sarah E. Logsdon
Ian S. McLean
Michael C. Cushing
Michael F. Skrutskie
Peter R. Eisenhardt
Daniel Stern
Mislav Baloković
Adam J. Burgasser
Jacqueline K. Faherty
George B. Lansbury
J.A. Rich
Nathalie Skrzypek
John W. Fowler
Roc M. Cutri
Frank J. Masci
Tim Conrow
Carl J. Grillmair
Howard L. McCallon
Charles A. Beichman
Kenneth A. Marsh
Abstract
The AllWISE processing pipeline has measured motions for all objects detected on Wide-field Infrared Survey Explorer (WISE) images taken between 2010 January and 2011 February. In this paper, we discuss new capabilities made to the software pipeline in order to make motion measurements possible, and we characterize the resulting data products for use by future researchers. Using a stringent set of selection criteria, we find 22,445 objects that have significant AllWISE motions, of which 3525 have motions that can be independently confirmed from earlier Two Micron All Sky Survey (2MASS) images, yet lack any published motions in SIMBAD. Another 58 sources lack 2MASS counterparts and are presented as motion candidates only. Limited spectroscopic follow-up of this list has already revealed eight new L subdwarfs. These may provide the first hints of a "subdwarf gap" at mid-L types that would indicate the break between the stellar and substellar populations at low metallicities (i.e., old ages). Another object in the motion list—WISEA J154045.67–510139.3—is a bright (J ≈ 9 mag) object of type M6; both the spectrophotometric distance and a crude preliminary parallax place it ~6 pc from the Sun. We also compare our list of motion objects to the recently published list of 762 WISE motion objects from Luhman. While these first large motion studies with WISE data have been very successful in revealing previously overlooked nearby dwarfs, both studies missed objects that the other found, demonstrating that many other nearby objects likely await discovery in the AllWISE data products.
Citation
Kirkpatrick, J. D., Schneider, A., Fajardo-Acosta, S., Gelino, C. R., Mace, G. N., Wright, E. L., …Marsh, K. A. (2014). The AllWISE Motion Survey and the Quest for Cold Subdwarfs. Astrophysical Journal, 783(2), https://doi.org/10.1088/0004-637x/783/2/122
Journal Article Type | Article |
---|---|
Publication Date | Mar 10, 2014 |
Deposit Date | Jul 31, 2014 |
Publicly Available Date | Mar 29, 2024 |
Journal | Astrophysical Journal |
Print ISSN | 0004-637X |
Electronic ISSN | 1538-4357 |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 783 |
Issue | 2 |
DOI | https://doi.org/10.1088/0004-637x/783/2/122 |
Keywords | Brown dwarfs, Catalogs, Aolar neighborhood, Stars: fundamental parameters, Stars: low-mass, Subdwarfs. |
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Copyright Statement
© 2014. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
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