Taxonomy of Barium Stars Virtual Observatory Resource

Authors
  1. Lu P.K.
  2. Published by
    CDS
Abstract

Image-tube spectra and photometric observations for 389 bariums stars have been used to determine spectral classification, barium intensity, radial velocity, luminosity, and kinematical properties. The objective of this study is to obtain a homogeneous dataset for analyzing barium characteristics in uniform fashion. -------------------------------------------------------------------------------- Summary: The objective of this study is to obtain a homogeneous dataset for analyzing barium characteristics in uniform fashion. The analyses show that barium stars appear to have young to old disk kinematics based upon whether they are Ba weak or Ba strong. The Ba II line (4554A) is also identifiable in dwarf stars; these dwarf barium stars are small in number and weak in intensity. The analyses of the kinematics, luminosities, U,V,W velocity distributions using image-tube radial velocities and statistical parallaxes using proper motions and upsilon components show that the weak barium stars generally tend to have smaller velocity dispersion, and brighter apparent magnitudes at about same distance compared to strong Ba stars, and thus lower luminosity. The solution for the mean spectroscopic distances, the z-scale height distances and reduced proper motions also confirm the this finding. --------------------------------------------------------------------------------

Keywords
  1. Spectroscopy
  2. Late-type stars
  3. Barium stars
Bibliographic source Bibcode
1991AJ....101.2229L
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/V/81
IVOA Identifier IVOID
ivo://CDS.VizieR/V/81

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=V/81
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=V/81
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=V/81
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/V/81/catalog?
https://vizier.iucaa.in/viz-bin/conesearch/V/81/catalog?
http://vizieridia.saao.ac.za/viz-bin/conesearch/V/81/catalog?

History

2004-11-02T12:42:09Z
Resource record created
2004-11-02T12:42:09Z
Created
2012-11-12T15:45:04Z
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