The Outflows of Binary AGB Stars
Paper in proceeding, 2015

The required conditions for stars to evolve into planetary nebulae (PNs) continues to puzzle. Since PNs are found in a wide variety of shapes, processes that could sculpt circumstellar envelopes (CSEs) are being investigated. A binary companion will have a strong gravitational effect, but known binary AGB stars are rare. Using ALMA in Cycle 1 and 2, we have observed a small sample of well-studied, binary AGB stars, covering a decisive range in separation, in order to determine the influence of a companion on the circumstellar morphology of the AGB primary. The first steps toward interpreting and analyzing the data have been taken, and the results will be compared to 3D Smoothed Particle Hydrodynamics (SPH) models of the gravitational interaction.


S. Ramstedt

Wouter Vlemmings

Chalmers, Earth and Space Sciences, Onsala Space Observatory

S. Mohamed

4th ALMA Science Conference on Revolution in Astronomy with ALMA: The Third Year, Tokyo, Japan, 8-11 December

Vol. 499 331-334
978-1-58381-883-1 (ISBN)

Subject Categories

Astronomy, Astrophysics and Cosmology


Onsala Space Observatory



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