SIMBAD references

2004A&A...428L..25S - Astronomy and Astrophysics, volume 428, L25-28 (2004/12-4)

SSSPM J1444-2019: An extremely high proper motion, ultracool subdwarf.


Abstract (from CDS):

We present the discovery of a new extreme high proper motion object (∼3.5arcsec/year) which we classify as an ultracool subdwarf with [M/H]~-0.5. It has a formal spectral type of sdM9 but also shows L-type features: while the VO bands are completely absent, it exhibits extremely strong TiO absorption in its optical spectrum. With a radial velocity of about -160km/s and a rough distance estimate of 16-24pc, it is likely one of the nearest halo members crossing the Solar neighbourhood with a heliocentric space velocity of (U,V,W)=(-244,-256,-100)±(32,77,6)km/s.

Abstract Copyright:

Journal keyword(s): surveys - astrometry - stars: kinematics - stars: low-mass, brown dwarfs - subdwarfs - solar neighbourhood

Simbad objects: 14

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