The Sirius supercluster

Details The Sirius supercluster The Sirius supercluster

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...162...54p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 162, no. 1-2, July 1986, p. 54-61.

Astronomy and Astrophysics

Astrophysics

30

Kinematics, Milky Way Galaxy, Star Clusters, Stellar Motions, Astronomical Catalogs, Astronomical Photometry, Hydrogen, Iron, Statistical Analysis

Scientific paper

The kinematics of the sample of 927 A stars has been investigated statistically. Their motion was approximated by means of the two velocity ellipsoids, which the authors used in the selection of 101 members of the Sirius Supercluster. Analysis of the photometric data from the Strömgren and Geneva systems shows that the sample is homogeneous with respect to its chemical composition, but it was difficult to give the value of [Fe/H] because of problems with the calibration of δm1 and Δm2. Comparison with stellar evolutionary models with the solar chemical composition (Y = 0.28, Z = 0.02) yielded the age 4.9±1.3×108yr. The authors can conclude from their data that the Sirius Supercluster was formed in the Carina spiral arm of our Galaxy.

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