Radial velocities of more old open clusters

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Publications of the Astronomical Society of the Pacific; (USA)

DOI:https://doi.org/10.1086/132583· OSTI ID:7163909

Friel, E D; Liu, Tianxing; Janes, K A ^[1]

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1. Dominion Astrophysical Observatory, Victoria (Canada) Boston Univ., MA (USA)

Moderate-resolution CCD spectra in the Mg b region of red giants in 13 old or metal-poor open clusters were obtained with the kitt Peak 2.1-m telescope. Radial velocities for these giants, measured by cross-correlation techniques, are accurate to 10 km/s. For the six clusters in the sample with previous measurements, the velocities are in good agreement with published values. Results are presented for seven clusters (NGC 1193, NGC 1817, NGC 6819, NGC 7142, Be 21, King 8, IC 166) with no previous radial-velocity measurements. The majority of clusters in the sample, supplemented with ten more clusters older than 1 Gyr which have published velocities, show radial velocities which are consistent with those expected from the reflex of solar motion and simple galactic rotation. A few of the clusters, including the newly measured NGC 1193 and NGC 1817, show surprisingly large radial velocities, indicating significant deviation from the general rotation of the remaining old cluster system. 52 refs.

• OSTI ID: 7163909
• Journal Information: Publications of the Astronomical Society of the Pacific; (USA), Journal Name: Publications of the Astronomical Society of the Pacific; (USA) Vol. 101; ISSN PASPA; ISSN 0004-6280
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AGE ESTIMATION
CHARGE-COUPLED DEVICES
CHEMICAL COMPOSITION
GALAXIES
GIANT STARS
MILKY WAY
MOTION
RADIAL VELOCITY
RED GIANT STARS
ROTATION
SEMICONDUCTOR DEVICES
SPECTROSCOPY
STAR CLUSTERS
STARS
VELOCITY