Visual multiples. VII - MK classifications

Details Visual multiples. VII - MK classifications Visual multiples. VII - MK classifications

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apjs...45..437a&link_type=abstract

Astrophysical Journal Supplement Series, vol. 45, Mar. 1981, p. 437-456.

Astronomy and Astrophysics

Astrophysics

81

Astronomical Catalogs, Classifications, Early Stars, Statistical Analysis, Stellar Spectra, Random Errors, Stellar Luminosity, Tables (Data), Visual Photometry

Scientific paper

Classifications are given for 865 components of visual multiples; they show no systematic differences from the MK system, and the random errors are one subclass in type and two-thirds of a luminosity class. It is found that at least 1% of the F-type IV and V stars are weak-lined, 32% of the A4-F1 IV and V stars are Am, and 5% of the A0-A3 IV and V stars are early-type Am. Attention is called to the large fraction (55%) of the A3-A9 III-V stars that are of luminosity classes III or IV, unlike the percentage (16%) at neighboring types.

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