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A Correlation Between Water Maser Emission and the Visual Light Curve of RX Bootis

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Jennifer Hedden

Priscilla J. Benson

Irene R. Little-Marenin

Whitin Observatory, Wellesley College, Wellesley, MA 02181

Robert R. Dacmus

Grinnell College

Physics Departmen

Grinnell, IA 50112

Received: December 19, 1991

Abstract

We investigate the emission from the 22.2 GHz maser line of water, and compare it to the visual light curve for the semi-regular variable star RX Boo.  There appears to be a correlation between the maser emission and light curve, however, the correlation is not as clear as for the regular Mira variables.  The water emission appears over a broad velocity range, and separate features appear to react to the changing light with different time delays.