ICCD speckle observations of binary stars. IX - A duplicity survey of the Pleiades, Praesepe, and IC 4665 clusters

Details ICCD speckle observations of binary stars. IX - A duplicity survey of the Pleiades, Praesepe, and IC 4665 clusters ICCD speckle observations of binary stars. IX - A duplicity survey of the Pleiades, Praesepe, and IC 4665 clusters

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106..637m&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 106, no. 2, p. 637-641.

Other

40

Binary Stars, Charge Coupled Devices, Pleiades Cluster, Star Clusters, Stellar Luminosity, Stellar Mass

Scientific paper

Multiplicity of stars within clusters is a well-studied phenomenon. However, recent survey work done on the Hyades by Mason et al. (1993) would seem to indicate that even in the most often studied clusters, there may be binaries yet undiscovered. In order to expand the sample of cluster binaries with potentially short-period visual orbits, a speckle survey of 45 Pleiades, 54 Praesepe, and 22 IC 4665 bright stars (V is less than 10) for possible multiplicity was conducted at the KPNO 4 m Mayall telescope between 1987 October and 1991 November. Of these, three new binaries have been discovered: one in the Pleiades where the new component may be spectroscopic, another in Praesepe which has been confirmed from examinations of archival observations and also has been resolved by occultation, and the third in IC 4665. Continued study of these new binary stars could further refine the cluster distance moduli as well as the cluster mass-luminosity relations.

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