Discovery of a bipolar and highly variable mass outflow from the symbioticbinary StH alpha 190

A highly and rapidly variable bipolar mass outflow from StH alpha 190 has b een discovered, the first time in a yellow symbiotic star. Permitted emissi on lines are flanked by symmetrical jet features and multi-component P-Cyg profiles, with velocities up to 300 km s(-1). Given the high orbital inclin ation of the binary, if the jets leave the system nearly perpendicular to t he orbital plane, the de-projected velocity equals or exceeds the escape ve locity (1000 km s(-1)). StHa: 190 looks quite peculiar in many other respec ts: the hot component is an O-type sub-dwarf without an accretion disk or a veiling nebular continuum and the cool component is a G7 III star rotating at a spectacular 105 km s(-1), unseen by a large margin in field G giants.