The circumstellar envelope of IRC+10216 from milli-arcsecond to arcmin scalesI. C. Leão, P. de Laverny, D. Mékarnia, J. R. De Medeiros and B. VandameA&A, 455 1 (2006) 187-194DOI: https://doi.org/10.1051/0004-6361:20054577