DISCOVERIES FROM A NEAR-INFRARED PROPER MOTION SURVEY USING MULTI-EPOCH TWO MICRON ALL-SKY SURVEY DATA
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Author(s)
Kirkpatrick, J. Davy
Looper, Dagny L.
Burgasser, Adam J.
Schurr, Steven D.
Cutri, Roc M.
Cushing, Michael C.
Cruz, Kelle L.
Sweet, Anne C.
Knapp, Gillian R.
Barman, Travis S.
Date Issued
September 2010
Journal
Astrophysical Journal Supplement Series
Publisher
American Astronomical Society
Citation
Kirkpatrick, J. Davy, Dagny L. Looper, Adam J. Burgasser, Steven D. Schurr, Roc M. Cutri, Michael C. Cushing, Kelle L. Cruz, et al. “DISCOVERIES FROM A NEAR-INFRARED PROPER MOTION SURVEY USING MULTI-EPOCH TWO MICRON ALL-SKY SURVEY DATA.” The Astrophysical Journal Supplement Series 190, no. 1 (September 1, 2010): 100–146.
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Author's final manuscript
Abstract
We have conducted a 4030 deg[superscript 2] near-infrared proper motion survey using multi-epoch data from the Two Micron All-Sky Survey (2MASS). We find 2778 proper motion candidates, 647 of which are not listed in SIMBAD. After comparison to Digitized Sky Survey images, we find that 107 of our proper motion candidates lack counterparts at B, R, and I bands and are thus 2MASS-only detections. We present results of spectroscopic follow-up of 188 targets that include the infrared-only sources along with selected optical-counterpart sources with faint reduced proper motions or interesting colors. We also establish a set of near-infrared spectroscopic standards with which to anchor near-infrared classifications for our objects. Among the discoveries are six young field brown dwarfs, five "red L" dwarfs, three L-type subdwarfs, twelve M-type subdwarfs, eight "blue L" dwarfs, and several T dwarfs. We further refine the definitions of these exotic classes to aid future identification of similar objects. We examine their kinematics and find that both the "blue L" and "red L" dwarfs appear to be drawn from a relatively old population. This survey provides a glimpse of the kinds of research that will be possible through time-domain infrared projects such as the UKIDSS Large Area Survey, various VISTA surveys, and WISE, and also through z- or y-band enabled, multi-epoch surveys such as Pan-STARRS and LSST.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1088/0067-0049/190/1/100
