A preliminary search of stars of rapid variability

Abstract

A T-association in the constellation: of the Southern Crown was first studied by Joy (1945). Known members are R CrA, T CrA, S CrA and TY CrA which present high peculiarities in both their spectra and their colors (for more details see Joy, 1945; Mendoza, 1968 and 1969; and Mendoza and the Jaschek's, 1968). This work gives preliminary results of a search of stars of rapid variability in brightness in the neighborhood of NGC 6729. This program will be extended to other centers of the Southern Hemisphere.