Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...364..114g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 364, Nov. 20, 1990, p. 114-117. Research supported by the University of Pit
Astronomy and Astrophysics
Astrophysics
26
Astrometry, Open Clusters, Pleiades Cluster, Stellar Parallax, Reference Stars, Stellar Luminosity, Stellar Magnitude, Stellar Spectrophotometry
Scientific paper
The multichannel astrometric photometer and Thaw refractor of the University of Pittsburgh's Allegheny Observatory have been used to determine the trigonometric parallax of the Pleiades star cluster. The distance determined, 150 with a standard error of 18 parsecs, places the cluster slightly farther away than generally accepted. This suggests that the basis of many estimations of the cosmic distance scale is approximately 20 percent short. The accuracy of the determination is limited by the number and choice of reference stars. With careful attention to the selection of reference stars in several Pleiades regions, it should be possible to examine differences in the photometric and trigonometric modulus at a precision of 0.1 magnitudes.
Castelaz Michael
Gatewood George
Han Inwoo
Persinger Timothy
Stein John
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