Asymmetric shocks in χ Cygni observed with linear spectropolarimetry A. López Ariste, B. Tessore, E. S. Carlín, Ph. Mathias, A. Lèbre, J. Morin, P. Petit, M. Aurière, D. Gillet and F. Herpin A&A, 632 (2019) A30 Published online: 25 November 2019 DOI: 10.1051/0004-6361/201936189