Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....110.2862e&link_type=abstract
Astronomical Journal v.110, p.2862
Astronomy and Astrophysics
Astronomy
18
Galaxy: Stellar Content, Galaxies: Stars Clusters
Scientific paper
Six percent of the FK5 stars of fundamental proper motion pass the convergent point test for membership in the IC 2391 supercluster if stars within 30° of the convergent and anticonvergent points (sin λ<0.5) and values of VTOT < 25 km/s are dismissed and a tolerance of 0.1 VTOT (0.1/sin λ) is placed on τ/ν. One third of these stars are eliminated by the luminosity test, using calibrations of available photometry, and an additional 40% are removed by the imposition of the requirement that ρ(Clus)-ρ(Obs)<3 km/s. This leaves 1% of the FK5 stars as supercluster members, which show a spread of about 107 yr, if 5 × 107 is the upper age limit of the early-type stars or 108 yr, if 5 × 107 is the minimum age. An age spread is also reflected in the lower main sequence stars. Interesting supercluster members include the spectroscopic triple HD 21364 (RR 1038), the ellipsoidal variable HD 1061 (UU Psc), the light variable HD 27290 (RR 1338) which lies in the Böhm-Vitense decrement (BVD), the red variable HD 89388 (RR 4050=V337 Car), and the peculiar A type, iron and barium underabundant and calcium, silicon, and helium overabundant, star HD 143459 (RR 5959). The FK5 stars were also tested with the contrived convergent points of δ=±90° but only the expected random selection of stars was found.
No associations
LandOfFree
Reality Tests of Superclusters in the Young Disk Population does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Reality Tests of Superclusters in the Young Disk Population, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reality Tests of Superclusters in the Young Disk Population will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1257411