Asymptotic Giant Branch Variables in NGC 6822
Abstract
Using multi-epoch JHK photometry obtained with the 1.4-m Japanese-South African Infrared Survey Facility at Sutherland we have identified large numbers of AGB variables in NGC 6822. This paper uses 30 large amplitude variables, with periods ranging from about 200 to 900 days, to provide a new calibration of the period-luminosity relation.
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