CO AND HCN OBSERVATIONS OF CIRCUMSTELLAR ENVELOPES - A CATALOG MASS-LOSS RATES AND DISTRIBUTIONS

We have searched the literature for all observations of the (CO(1-0))- C-12, (CO(2-1))-C-12, and HCN(1-0) lines in circumstellar envelopes of late type stars published between January 1985 and September 1992. We report data for 1361 observations (stellar velocity, expansion veloci ty, peak intensity, integrated area, noise level). This CO-HCN sample now contains 444 sources. 184 are identified as oxygen-rich, 205 as ca rbon-rich, and there are 9 S stars. About 85% of the sources are AGB s tars. There are 32 planetary nebulae and about thirty post-AGB stars c andidates. Besides results of millimeter observations, we also list id entifications, coordinates, IRAS data, chemical and spectral types for every source. For AGB stars, we have estimated (or compiled) bolometr ic fluxes and distances for 349 sources, and mass loss rates deduced f rom CO results for 324 sources, taking into account the influence of t he CO photodissociation radius. We also list mass loss rates derived f rom detailed models of CO emission which we could find in the literatu re.