Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.2028e&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 102, Dec. 1991, p. 2028-2040.
Astronomy and Astrophysics
Astronomy
34
A Stars, Giant Stars, Star Clusters, Pleiades Cluster, Stellar Mass, Stellar Motions
Scientific paper
Sixty-three field stars and the sparse cluster IC 2391 have been identified as members of the IC 2391 supercluster. The members have at least 95 percent of their space motion, directed toward (A,D) = (5.82h, - 12.44d). Like members of the very similar Pleiades supercluster, the IC 2391 supercluster contains objects of two ages: t = 8 x 19 exp 7 and 2.5 x 10 exp 8 yr. A prototype very active chromosphere star and the enigmatic giant variable TZ For are supercluster members together with two A-type stars suspected of possessing particulate disks. An especially interesting member is the system of Xi Cep (HR 8417) in which the two brightest components are greatly undermassive.
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