Computer Science – Databases
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1094..955s&link_type=abstract
COOL STARS, STELLAR SYSTEMS AND THE SUN: Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.
Computer Science
Databases
Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc., Low Luminosity Stars, Subdwarfs, And Brown Dwarfs, Stellar Characteristics And Properties
Scientific paper
We have detected about 40 new, extremely faint (i>21) high proper motion (μ>0.14 arcsec/yr) objects from deep multi-epoch Sloan Digital Sky Survey (SDSS) imaging data in a 110×2.5 = 275 square degrees area on the celestial equator (SDSS stripe 82). According to their location in a reduced proper motion diagram and from comparison with known objects, these objects are representatives of three different classes: 1) L and T dwarfs, 2) ultracool (>sdM7) subdwarfs, 3) cool white dwarfs. Low-resolution optical spectroscopy with the VLT has confirmed this classification and provided preliminary spectroscopic distance estimates. The resulting tangential velocities give first hints on the membership of these nearby low-luminosity objects in the Galactic disk or halo populations.
Knapp Gillan R.
Scholz Ralf-Dieter
Storm Jesper
Zinnecker Hans
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