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A radial velocity survey of the open cluster IC 4665A radial velocity survey of the open cluster IC 4665 is reported for a group of candidate members previously identified on the basis of proper motion and photometry. Of those candidates observed, 20 out of 42 have radial velocities consistent with membership; these cluster members populate the F5-K0 dwarf region and represent the first relatively conclusive membership determinations for such solar-type stars in IC 4665. Three new spectroscopic binary members of the cluster have been identified. Rotational velocities have also been derived; the v sin i distribution among IC 4665 members reveals that most apparent G dwarf members of IC 4665 are seen to exhibit substantial rotation (v sin i greater than 10 km/s). When compared to evolutionary isochrones, the current list of intermediate-mass members appears to support earlier suggestions that IC 4665 has an age comparable to the Pleiades.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Prosser, Charles F.
(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA United States)
Giampapa, Mark S.
(National Optical Astronomy Observatories, Tucson, AZ United States)
Date Acquired
August 16, 2013
Publication Date
September 1, 1994
Publication Information
Publication: The Astronomical Journal
Volume: 108
Issue: 3
ISSN: 0004-6256
Subject Category
Accession Number
Funding Number(s)
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