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Interactions between AGB stars and a secondary in a close orbit are onepossible explanation of why some AGB stars develop into aspherical planetarynebulae. This study uses millimeter observations of the continuum and SiO maseremission in several symbiotic Miras looking for evidence of an interactionbetween the two stars. New JVLA observations at ~45 mas resolution areanalyzed, imaging continuum and SiO masers. Two of the three targets weredetected and accurately registered continuum and line images were derived. Noclear evidence of an interaction was found between components B and A in Mira.R Aqr has a well known jet arising from the secondary star. The jet may bedisturbing the circumstellar envelop of the AGB star or possibly just nearlyaligned with it.

SiO masers and 7 mm Continuum in Mira and R Aqr