Metal-rich halo A stars

DOI

The results of spectrophotometry of the Ca II K and Balmer lines and radial velocity measurements for stars earlier than type F0, with 10<V-0.5. The metal-rich population has a vertical scale height of ~600pc and a space density at the Sun equal to 1/225 of the young thin disk A star population. The metal-rich A stars have V_rot_=210+/-60km/s with decreasing angular momentum as a function of distance from the Galactic plane. The line-of-sight velocity dispersion is 40+/-3km/s indicating an anomalous relation between structure and kinematics. There is strong evidence that these stars are identical in properties to the metal-rich extended populations found by Perry [1969AJ.....74..139P] at the NGP and Rodgers [1971ApJ...165..581R] at the SGP.

Cone search capability for table J/AJ/106/1839/table1 (Spectrophotometry and radial velocities of stars classified as of type earlier than F0 in the fields (l;b)=(90 deg, 270 deg; -45 deg) from the catalog of Paper I)

Identifier
DOI http://doi.org/10.26093/cds/vizier.51061839
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/AJ/106/1839
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/106/1839
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/106/1839
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/AJ/106/1839
Provenance
Creator Rodgers A.W.; Roberts W.H.
Publisher CDS
Publication Year 1999
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; Exoplanet Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy