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

Details SSSPM J1444-2019: an extremely high proper motion, ultracool subdwarf SSSPM J1444-2019: an extremely high proper motion, ultracool subdwarf

2004-11-08

arxiv.org/abs/astro-ph/0411179v1

Astron.Astrophys. 428 (2004) L25-L28

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures (Fig.1a-d available as jpg files), accepted for publication in Astronomy & Astrophysics Letters

Scientific paper

10.1051/0004-6361:200400098

We present the discovery of a new extreme high proper motion object (3.5 arcsec/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 -160 km/s and a rough distance estimate of 16--24 pc, 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.

Affiliated with

Also associated with

No associations

Rating

SSSPM J1444-2019: an extremely high proper motion, ultracool subdwarf does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with SSSPM J1444-2019: an extremely high proper motion, ultracool subdwarf, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SSSPM J1444-2019: an extremely high proper motion, ultracool subdwarf will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-108830