Issue |
A&A
Volume 435, Number 1, May III 2005
|
|
---|---|---|
Page(s) | 363 - 372 | |
Section | Celestial mechanics and astrometry | |
DOI | https://doi.org/10.1051/0004-6361:20042002 | |
Published online | 25 April 2005 |
Southern infrared proper motion survey
I. Discovery of new high proper motion stars from first full hemisphere scan
Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh EH9 3HJ, UK e-mail: [nd;n.hambly;j.cooke]@roe.ac.uk
Received:
13
September
2004
Accepted:
30
November
2004
We present the first results from the Southern Infrared
Proper Motion Survey. Using 2 Micron All Sky Survey data along with
that of the SuperCOSMOS sky survey we have been able to produce the
first widefield infrared proper motion survey. Having targeted the
survey to identify nearby M, L and T dwarfs we have discovered 70
such new objects with proper motions greater than 0.5''/yr with 10 of
these having proper motions in excess of 1''/yr. The most
interesting of these objects is SIPS1259-4336 a late M dwarf. We
have calculated a trigonometric parallax for this object of milliarcsec yielding a distance of
pc. We
have also discovered a common proper motion triple system and an
object with a common proper motion with LHS 128. The survey
completeness is limited by the small epoch differences between many
2MASS and UKI observations. Hence we only recover 22% of Luyten
objects with favourable photometry. However the Luyten study is
itself unquantifiably incomplete. We discuss the prospect of
enhancing the survey volume by reducing the lower proper motion
limit.
Key words: astrometry / stars: low mass, brown dwarfs
© ESO, 2005
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