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The distribution of rotational velocities for low-mass stars in the PleiadesThe available spectral type and color data for late-type Pleiades members have been reanalyzed, and new reddening estimates are obtained. New photometry for a small number of stars and a compilation of H-alpha equivalent widths for Pleiades dwarfs are presented. These data are used to examine the location of the rapid rotators in color-magnitude diagrams and the correlation between chromospheric activity and rotation. It is shown that the wide range of angular momenta exhibited by Pleiades K and M dwarfs is not necessarily produced by a combination of main-sequence spin-downs and a large age spread; it can also result from a plausible spread in initial angular momenta, coupled with initial main-sequence spin-down rates that are only weakly dependent on rotation. The new reddening estimates confirm Breger's (1985) finding of large extinctions confined to a small region in the southern portion of the Merope nebula.
Document ID
19870059325
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Stauffer, John R.
(NASA Ames Research Center Moffett Field, CA; Dominion Astrophysical Observatory, Victoria, Canada)
Hartmann, Lee W.
(Smithsonian Astrophysical Observatory Cambridge, MA, United States)
Date Acquired
August 13, 2013
Publication Date
July 1, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 318
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A46599
Distribution Limits
Public
Copyright
Other

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