Investigation of the Praesepe cluster. I - Identification of halo members

Details Investigation of the Praesepe cluster. I - Identification of halo members Investigation of the Praesepe cluster. I - Identification of halo members

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...235..114m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 235, no. 1-2, Aug. 1990, p. 114-130. Research supported by SNSF.

Astronomy and Astrophysics

Astrophysics

49

Binary Stars, Dwarf Stars, Star Clusters, Stellar Orbits, Radial Velocity, Spatial Distribution, Stellar Motions, Stellar Spectrophotometry

Scientific paper

Coravel radial velocities and UBVRI (Kron) photometry of 117 stars selected by their proper motion in the region surrounding Praesepe (NGC 2632, C 0837 + 201) have permitted identification of 48 members of the cluster halo, up to a distance of 4 deg from the cluster center. The 43 (F5-K0) new members represent 51 percent of the number of nucleus members known in this spectral interval. Ten spectroscopic binaries have been discovered among the F5-F0 members, resulting in a frequency of 23 percent, which rises to 33 percent four probable binaries are taken into account. Six orbits have been obtained, with periods ranging from 1.2 to 143 d. Four additional binaries have been detected among the non-member stars.

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