Spectral Classification of Stars in A Supplement to the Bright Star Catalogue
MK spectral types are given for about 584 stars in A Supplement to theBright Star Catalogue. These are compared with Hipparcos parallaxes tocheck the reliability of those classifications. The estimated errors are+/-1.2 subtypes, and 10% of the luminosity classes may be wrong.
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Visual multiples. VII - MK classifications
Classifications are given for 865 components of visual multiples; theyshow no systematic differences from the MK system, and the random errorsare one subclass in type and two-thirds of a luminosity class. It isfound 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 starsare early-type Am. Attention is called to the large fraction (55%) ofthe A3-A9 III-V stars that are of luminosity classes III or IV, unlikethe percentage (16%) at neighboring types.
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Micrometer Observations of Double Stars and New Pairs - Part Ten
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980ApJS...44..111H&db_key=AST
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A classification of star clusters in the Magellanic Clouds
Four-color photometry of the integrated light from 61 star clusters inthe Magellanic Clouds, together with a rediscussion of Danziger'smultivariate spectrophotometric data for some of these same clusters,have made possible for the first time an intelligible classificationscheme for their integrated spectra. It is found that the integratedspectra of populous star clusters in the Magellanic Clouds may bearranged in a one-dimensional sequence in such a way, that on traversingthe sequence, all spectral features behave regularly - not necessarilymonotonically, but as smoothly as can be expected from the magnitude ofobservational error. The character of the spectral variations along thesequence suggests that both cluster age and chemical composition varysmoothly as the sequence is traversed. The newly discovered sequence isdistinctly different from the analogous one for star clusters of theGalaxy, and this fact is interpreted as indicating that the relationbetween epoch and average chemical composition of the interstellarmedium is qualitatively different in different stellar systems.
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Photoelektrische Photometrie von Shell-Sternen
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974A&AS...15..311H&db_key=AST
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UBV photometry of star clusters in the Magellanic Clouds.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1968AJ.....73..569V&db_key=AST
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UBV-Helligkeiten von acht Sternpaaren am Äquator
Not Available
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