机译:The detached dust shells of AQ Andromedae, U Antliae, and TT Cygni
Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, 3001 Leuven, Belgium;
University of Vienna, Department of Astronomy, Türkenschanzstra?e 17, 1180 Vienna, Austria;
Royal Observatory of Belgium, Ringlaan 3, 1180 Brussels, Belgium;
Infrared: stars; Stars: AGB and post-AGB; Stars: carbon; Stars: evolution; Stars: mass-loss;