Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...422..111b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 422, no. 1, p. 111-117
Astronomy and Astrophysics
Astronomy
20
Color-Magnitude Diagram, Giant Stars, Infrared Astronomy, Infrared Spectra, Kinematics, Milky Way Galaxy, Radial Velocity, Star Distribution, Astronomical Observatories, Gratings (Spectra), Infrared Imagery, Infrared Spectrometers, Optical Filters, Telescopes
Scientific paper
We present radial velocities for 33 stars in an optically obscured field toward the Galactic bulge at l = -1.14 degree, b = 1.81 degree. The radial velocities are derived from spectra of the 2.3 micrometer CO bandhead that is prominent in late-type giants. The heliocentric radial velocity and dispersion are -75 +/- 24 km/s and 127 +/- 16 km/s, respectively. Comparison to the axisymmetric mass model of Kent (1992) shows good agreement with the velocity dispersion, but there is some evidence (at the 2.1 sigma level) for a more negative mean velocity. The more negative mean velocity is suggestive of streaming motion in a rotating barred potential such as derived by Binney et al. (1991).
Blum Robert David
Carr John S.
DePoy Darren L.
Sellgren Kris
Terndrup Donald M.
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