Radial velocity measurements in the Pleiades

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/170342· OSTI ID:5184766

Liu, T; Janes, K A; Bania, T M ^[1]

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1. California, University, Los Angeles (United States) Boston University, MA (United States)

High-resolution radial velocities for 71 stars of both early and late spectral types in the Pleiades cluster have been obtained in order to investigate the possibility of establishing an early-type star velocity system by bootstrapping late-type velocity standards to early-type ones in young clusters. It is shown that in the absence of early-type velocity standards the velocity scale of the early-type spectra in the cluster can be tied into the IAU velocity system by examining the velocity distributions of both the early-type and the late-type stars, since the internal velocity dispersion in an open cluster is less than about 1 km/s. It is found that the cluster velocity of the Pleiades is 6.0 km/s, with an observed velocity dispersion of 1 km/s. Based on these velocity results, a list of potentially constant velocity B and A stars is proposed for further studies to confirm the constancy of their velocities. 24 refs.

• OSTI ID: 5184766
• Journal Information: Astrophysical Journal; (United States), Journal Name: Astrophysical Journal; (United States) Vol. 377; ISSN ASJOA; ISSN 0004-637X
• 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
MEASURING METHODS
RADIAL VELOCITY
RESOLUTION
SPECTRA
STAR CLUSTERS
VELOCITY