Spectroscopically Selected Halo K Giants (Ratnatunga+ 1989)

Details Spectroscopically Selected Halo K Giants (Ratnatunga+ 1989) Spectroscopically Selected Halo K Giants (Ratnatunga+ 1989)

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ycat.5065....0r&link_type=abstract

VizieR On-line Data Catalog: V/65. Originally published in: 1989ApJ...339..126R

Physics

Abundances: [Fe/H], Radial Velocities, Stars: Giant, Stars: Halo, Stars: High-Velocity

Scientific paper

The catalog results from a survey for distant Field K giants in the Galactic halo made for purposes of locating a chemically and kinematically unbiased sample out to about 25 kpc from the Sun. The motivation for the study and sample selection are outlined by Ratnatunga & Freeman (1985ApJ...291..260R), while details and analysis of the results will be found in Ratnatunga & Freeman (1989). Three high-galactic latitude fields each of 20 square degrees, designated by their Selected-Area identifications, include the following: SA 141 (l=240,b=-85); SA 189 (277, -50); and SA 127 (272, +38), and have the apparent magnitude range 13 < V < 16 and color range (B-V) > 0.9. Stars were selected from PDS photographic photometry of Schmidt plates (see Ratnatunga 1983, catalog II/121). K-giant selection used the Mgb+MgH feature at 5100A from digital image analysis of PDS scans of ESO 1-m Schmidt telescope objective-prism spectra with 450 A/mm at H-gamma resolution on IIIa-J plates exposed through a Schott GG475 filter. Luminosity confirmation, line-of-sight velocities, and metallicity were determined from 2-A resolution slit spectra taken with the 4-m Anglo- Australian and 1.9-m Mount Stromlo telescopes. Cross identifications exist for some stars in the SA 141 SGP field only.
(1 data file).

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