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Kinematics of the galactic bulge

Published online by Cambridge University Press:  07 August 2017

D. Minniti
Affiliation:
Steward Observatory, Univ. of Arizona, Tucson, U.S.A.
S.D.M. White
Affiliation:
Institute for Astronomy, Cambridge, England
E. Olszewski
Affiliation:
Steward Observatory, Univ. of Arizona, Tucson, U.S.A.
J. Hill
Affiliation:
Steward Observatory, Univ. of Arizona, Tucson, U.S.A.
M. Irwin
Affiliation:
Institute for Astronomy, Cambridge, England

Extract

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We present spectroscopic observations of ~200 giant stars in two fields toward the Galactic bulge. The positions of fields 588 and 589 are at l,b = (8,7) and (12,3), respectively, which corresponds to a Galactocentric distance of ~1.6 kpc for the stars in the bulge. The K giants were selected from color-magnitude and color-color diagrams produced by scans of B, R and I plates from the APM machine. The spectra were obtained with the MX multi-object spectrograph at the Steward 90″ telescope, and with the Red Channel spectrograph at the MMT. Radial velocities good to ≪ 10 km/s were obtained from cross-correlation techniques. A grid of ~100 standard stars was built to calibrate spectrophotometric indices that provide abundances and luminosities.

Type
Poster Papers
Copyright
Copyright © Kluwer