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A REDDENING-FREE MAIN SEQUENCE FOR THE PLEIADES CLUSTER
D. G. TURNER
Publications of the Astronomical Society of the Pacific
Vol. 91, No. 543 (October 1979), pp. 642-647
Published by: Astronomical Society of the Pacific
Stable URL: http://www.jstor.org/stable/40677471
Page Count: 6
You can always find the topics here!Topics: Main sequence stars, Metal abundance, Proper motions, Parallax, Astronomy, Solar neighborhood, Stellar classification, Calibration, Error rates, Astronomical objects
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The effects of differential reddening on the UBV colors of Pleiades members have been removed for stars earlier than (B—V)o = 1ṃ00, and the dereddened colors have been found to exhibit an ultraviolet excess of δ(U-B) — + 0ṃ03 with respect to Hyades stars. A correction of + 0ṃ15 in MΓ at constant (B—V) has been derived for the Hyades main sequence to adjust it to Pleiades metallicity, and this has been fit to Pleiades late-type dwarfs in order to define a new photometric ZAMS for typical solar neighborhood stars of spectral types A, F, and G. A zero-point of 3.15 was adopted for the Hyades distance modulus based upon a review of available astrometric data, and the corresponding Pleiades distance modulus is 5.56.
Publications of the Astronomical Society of the Pacific © 1979 The University of Chicago Press