E.L. Wright
The first AllWISE proper motion discovery : WISEA J070720.50+170532.7
Wright, E.L.; Kirkpatrick, J.D.; Gelino, C.R.; Fajardo-Acosta, S.; Mace, G.; Eisenhardt, P.R.; Stern, D.; McLean, I.S.; Skrutskie, M.F.; Oza, A.; Nelson, M.J.; Cushing, M.C.; Reid, I.N.; Fumagalli, M.; Burgasser, A.J.
Authors
J.D. Kirkpatrick
C.R. Gelino
S. Fajardo-Acosta
G. Mace
P.R. Eisenhardt
D. Stern
I.S. McLean
M.F. Skrutskie
A. Oza
M.J. Nelson
M.C. Cushing
I.N. Reid
Professor Michele Fumagalli michele.fumagalli@durham.ac.uk
Academic Visitor
A.J. Burgasser
Abstract
While quality checking a new motion-aware co-addition of all 12.5 months of Wide-field Infrared Survey Explorer (WISE) data, we found that the source WISE J070720.48+170533.0 moved 0.''9 in six months. Backtracking this motion allowed us to identify this source as 2MASS J07071961+1705464, with several entries in the USNO B catalog. An astrometric fit to these archival data gives a proper motion of μ = 1793 ± 2 mas yr–1 and a parallax of piv = 35 ± 42 mas. Photometry from WISE, 2MASS, and the POSS can be fit reasonably well by a blackbody with T = 3658 K and an angular radius of 4.36 × 10–11 radians. No clear evidence of H2 collision-induced absorption is seen in the near-infrared. An optical spectrum shows broad deep CaH bands at 638 and 690 nm, broad deep Na D at 598.2 nm, and weak or absent TiO, indicating that this source is an ultra-subdwarf M star with a radial velocity v rad ≈ –21 ± 18 km s–1 relative to the Sun. Given its apparent magnitude, the distance is about 39 ± 9 pc and the tangential velocity is probably ≈330 km s–1, but a more precise parallax is needed to be certain.
Citation
Wright, E., Kirkpatrick, J., Gelino, C., Fajardo-Acosta, S., Mace, G., Eisenhardt, P., …Burgasser, A. (2014). The first AllWISE proper motion discovery : WISEA J070720.50+170532.7. Astronomical Journal, 147(3), Article 61. https://doi.org/10.1088/0004-6256/147/3/61
Journal Article Type | Article |
---|---|
Publication Date | Feb 1, 2014 |
Deposit Date | Apr 6, 2014 |
Publicly Available Date | Sep 8, 2014 |
Journal | Astronomical Journal |
Print ISSN | 0004-6256 |
Electronic ISSN | 1538-3881 |
Publisher | IOP Publishing |
Peer Reviewed | Peer Reviewed |
Volume | 147 |
Issue | 3 |
Article Number | 61 |
DOI | https://doi.org/10.1088/0004-6256/147/3/61 |
Keywords | Brown dwarfs, Infrared: stars, Solar neighborhood, Stars: individual (WISEA J070720.50+170532.7), Stars: late-type, Stars: low-mass. |
Files
Published Journal Article
(678 Kb)
PDF
Copyright Statement
© 2014. The American Astronomical Society. All rights reserved.
You might also like
The relationship between gas and galaxies at z < 1 using the Q0107 quasar triplet
(2021)
Journal Article
Discovery of a Damped Lyα Galaxy at z ∼ 3 toward the Quasar SDSS J011852+040644
(2021)
Journal Article
Sub-damped Lyman α systems in the XQ-100 survey – II. Chemical evolution at 2.4 ≤ z ≤ 4.3
(2021)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search