Herschel/HIFI observations of molecular emission in protoplanetary nebulae and young planetary nebulae
Bujarrabal, V × Alcolea, J Soria-Ruiz, R Planesas, P Teyssier, D Cernicharo, J Decin, Leen Dominik, C Justtanont, K de Koter, A Marston, A. P Melnick, G Menten, K. M Neufeld, D. A Olofsson, H Schmidt, M Schoier, F. L Szczerba, R Waters, L. B. F. M #
Astronomy & Astrophysics vol:537 pages:-
Aims. We aim to study the physical conditions, particularly the excitation state, of the intermediate-temperature gas in protoplanetary nebulae and young planetary nebulae (PPNe, PNe). The information that the observations of the different components deliver is of particular importance for understanding the evolution of these objects.