Revised NLTT Catalog Virtual Observatory Resource

Authors
  1. Salim S.
  2. Gould A.
  3. Published by
    CDS
Abstract

We complete construction of a catalog containing improved astrometry and new optical/infrared photometry for the vast majority of NLTT stars lying in the overlap of regions covered by POSS I and by the second incremental Two Micron All Sky Survey (2MASS) release, approximately 44% of the sky. The epoch 2000 positions are typically accurate to 130mas, the proper motions to 5.5mas/yr, and the V-J colors to 0.25mag. Relative proper motions of binary components are measured to 3mas/yr. The false-identification rate is ~1% for 11<=V<=18 and substantially less at brighter magnitudes. These improvements permit the construction of a reduced proper-motion diagram that, for the first time, allows one to classify NLTT stars into main-sequence (MS) stars, subdwarfs (SDs), and white dwarfs (WDs). We in turn use this diagram to analyze the properties of both our catalog and the NLTT catalog on which it is based. In sharp contrast to popular belief, we find that NLTT incompleteness in the plane is almost completely concentrated in MS stars, and that SDs and WDs are detected almost uniformly over the sky {delta}>-33{deg}. Our catalog will therefore provide a powerful tool to probe these populations statistically, as well as to reliably identify individual SDs and WDs.

Keywords
  1. proper-motions
  2. high-velocity-stars
Bibliographic source Bibcode
2003ApJ...582.1011S
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/582/1011
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/582/1011
Document Object Identifer DOI
doi:10.26093/cds/vizier.15821011

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/582/1011
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/582/1011
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/582/1011
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/582/1011/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/582/1011/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/582/1011/table2?

History

2003-07-07T22:45:56Z
Resource record created
2003-07-07T22:45:56Z
Created
2017-03-04T17:48:22Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr