Early-type stars towards the Galactic Centre Virtual Observatory Resource

Authors
  1. Dufton P.L.
  2. Smartt S.J.
  3. Hambly N.C.
  4. Published by
    CDS
Abstract

We have begun a search for early-type stars towards the galactic centre which are potentially young objects situated within the inner few kiloparsecs of the disk. U and V (or I) band photographic photometry from the UK Schmidt Telescope has been obtained to identify the bluest candidates in nineteen Schmidt fields (centred close to the galactic centre). We have spectroscopically observed these targets for three fields with the FLAIR multi-fibre system to determine their spectral types. In particular, ten early B-type stars have been identified and equivalent width measurements of their Balmer and HeI lines have been used to estimate atmospheric parameters. These early-type objects have magnitudes in the range 11.5=<V<=16.0, and our best estimates of their distance (given probable highly variable reddening in this direction together with errors in the plate photometry) suggest that some of them originated close to (i.e R_g_<3kpc), or even beyond the galactic centre. Future high-resolution spectroscopy of these stars will provide reliable atmospheric parameters and element abundances, in order to map the current chemical composition of the inner galaxy.

Keywords
  1. early-type-stars
  2. visible-astronomy
  3. photographic-photometry
  4. line-intensities
Bibliographic source Bibcode
1999A&AS..139..231D
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/139/231
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+AS/139/231

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/139/231
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/139/231
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/139/231
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).
https://vizier.cds.unistra.fr/viz-bin/conesearch/0?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/139/231/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/139/231/table2?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/0?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/139/231/table3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/139/231/table3?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/0?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/139/231/table4?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/139/231/table4?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/0?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/139/231/table5?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/139/231/table5?

History

2001-09-16T18:18:20Z
Resource record created
2001-09-16T18:18:20Z
Created
2001-09-16T18:18:30Z
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