VISIR-VLT high resolution study of the extended emission of four obscured post-AGB candidates

M. W. Blanco, M. A. Guerrero, G. Ramos-Larios +4

The onset of the asymmetry of planetary nebulae (PNe) is expected to occur during the late Asymptotic Giant Branch (AGB) and early post-AGB phases of low- and intermediate-mass sta…