Titlebook: Variable Stars in Globular Clusters and in Related Systems; Proceedings of the I J. D. Fernie Conference proceedings 1973 D. Reidel Publish

子女

agglomerate

民间传说

Two-Colour Photometry of RR Lyrae Variables in NGC 6981 in the class of intermediate-to-high metal abundance clusters such as M3. The colour-magnitude diagram shows a horizontal branch populated on both sides of the variable star region. Previous work on the periods of the variables has indicated that the cluster is of Oosterhoff type I, with . day. Som

Generic-Drug

ITCH

Two-Color Observations of RR Lyrae Stars in M14 shown, and it is noted that there is a lack of horizontal branch stars to the red of the variable star gap. Color-amplitude, period-amplitude and color-period relations for the RR Lyrae variables measured are shown.

压碎

大量杀死

Period and Period Changes of RR Lyrae Variables in M15 of cycles from the time of Bailey’s observations to the present day cannot always be made unambiguously, there is a corresponding uncertainty in the nature and amount of the period changes. Good lightcurves are obtained even when the periods used for their reduction are incorrect because the number

傲慢物

Period Changes as Evidence for Evolution in , Cennge sign that they cannot possibly be attributed to stellar evolution. If you are wondering how this report can dare to make a contradictory claim read the title carefully. It does not promise that there really is evidence for evolution in Omega Centauri. It only proposes to look at the period chang

修剪过的树篱

Abrade

Observations of Faint Globular Clusterses taken with the Schmidt telescope of the Vatican Observatory. After an extensive discussion the authors con­cluded that the object was either a peculiar globular cluster at an estimated distance of 63 kpc or an old galactic cluster at a distance of the order of 16 kpc.