Discovery of a bipolar and highly variable mass outflow from the symbiotic binary StHa 190

Details Discovery of a bipolar and highly variable mass outflow from the symbiotic binary StHa 190 Discovery of a bipolar and highly variable mass outflow from the symbiotic binary StHa 190

2001-02-11

arxiv.org/abs/astro-ph/0102192v1

Astronomy and Astrophysics

Astrophysics

Letter to the Editor, Astron.Astrophys, in press

Scientific paper

10.1051/0004-6361:20010210

A highly and rapidly variable bipolar mass outflow from StHa 190 has been discovered, the first time in a yellow symbiotic star. Permitted emission lines are flanked by symmetrical jet features and multi-component P-Cyg profiles, with velocities up to 300 km/sec. Given the high orbital inclination of the binary, if the jets leave the system nearly perpendicular to the orbital plane, the de-projected velocity equals or exceeds the escape velocity (1000 km/sec). StHa190 looks quite peculiar in many other respects: 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/sec unseen by a large margin in field G giants.

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