Early-type stars towards the Galactic Centre

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.

Cone search capability for table J/A+AS/139/231/table2 (Blue stellar candidates for which spectroscopy was not obtained)

Cone search capability for table J/A+AS/139/231/table3 (*Field 393 preliminary identifications of targets)

Cone search capability for table J/A+AS/139/231/table4 (Field 454 preliminary identifications of targets)

Cone search capability for table J/A+AS/139/231/table5 (Field 456 preliminary identifications of targets)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+AS/139/231
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/139/231
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/139/231
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+AS/139/231
Provenance
Creator Dufton P.L.; Smartt S.J.; Hambly N.C.
Publisher CDS
Publication Year 2001
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy