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29 March 2024
 
  » arxiv » astro-ph/0102192

 Article overview


Discovery of a bipolar and highly variable mass outflow from the symbiotic binary StHa 190
U.Munari ; T.Tomov ; B.F.Yudin ; P.M.Marrese ; T.Zwitter ; R.G.Gratton ; G.Bonanno ; P.Bruno ; A.Cali ; R.U.Claudi ; R.Cosentino ; S.Desidera ; G.Farisato ; G.Martorana ; G.Marino ; M.Rebeschini ; S.Scuderi ; M.C.Timpanaro ;
Date 11 Feb 2001
Subject astro-ph
Affiliation1,2), T.Tomov (2,3), B.F.Yudin , P.M.Marrese (1,2), T.Zwitter , R.G.Gratton , G.Bonanno , P.Bruno , A.Cali , R.U.Claudi , R.Cosentino (7,8), S.Desidera , G.Farisato , G.Martorana , G.Marino , M.Rebeschini , S.Scuderi , M.C.Timpanaro ( Astron.Obs.Asia
AbstractA 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.
Source arXiv, astro-ph/0102192
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