Water Maser Emission and the Visual Light Curve of R Draconis

Volume 20 number 2 (1991)

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Samantha J. Osmer

Whitin Observatory, Wellesley College, Wellesley, MA 02181

Priscilla J. Benson

Whitin Observatory, Wellesley College, Wellesley, MA 02181

Irene R. Little-Marenin

Whitin Observatory, Wellesley College, Wellesley, MA 02181

Abstract

The water maser emmision of R Draconis was observed at 22 GHz at the Haystack Observatory approximately once each month from November 1988 to July 1990. There is a correlation between the variations of the maser emission and the AAVSO light curve; the peak of the maser activity follows the light activity by about 0.2 period.