...stars

Based on observations carried out at the Caltech Submillimeter Observatory (Mauna Kea, Hawaii).

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...Jorissen^,

Research Associate, F.N.R.S., Belgium.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...(IPAC

IPAC is operated by the Jet Propulsion Laboratory and California Institute of Technology for NASA.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...speed

The mass loss rates estimated in the present paper might therefore be inadequate for those stars in Regions D and E with a resolved - possibly detached - shell as observed at
80#80m.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.