Investigation of the Praesepe cluster. 2: Three triple systems: KW 365, 367 and 495

Details Investigation of the Praesepe cluster. 2: Three triple systems: KW 365, 367 and 495 Investigation of the Praesepe cluster. 2: Three triple systems: KW 365, 367 and 495

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...283..515m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 283, no. 2, p. 515-521

Statistics

Computation

23

Binary Stars, Computational Astrophysics, Dwarf Stars, Emission Spectra, Praesepe Star Clusters, Spectroscopic Analysis, Triple Stars, Astronomical Spectroscopy, Radial Velocity, Spectral Signatures, Spectroscopic Telescopes, Stellar Orbits

Scientific paper

Three triple systems have been discovered among G dwarfs in the Praesepe open cluster (KW 365, 367 and 495). Each of the three systems is composed by a wide pair, one of whose components is in addition a spectroscopic binary. Each one presents however a different signature of multiplicity. An orbit has been determined for the spectroscopic binary component in each system. The periods for KW 365, 367 and 495 are 51.24d, 3.057d and 35.896d respectively. The ratios between the long and short periods make them highly hierarchical systems. Several other triple or quadruple systems known in open clusters are briefly reviewed.

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