  The author presents the results of Berkeley-Illinois-Maryland (BIMA) array
interferometric observations in the CO J=1-0 line toward X Her and EP Aqr, the
semiregular pulsating stars with a composite CO line profile, and also reports
finding of a disklike structure in X Her. In the CO spectrum both of X Her and
EP Aqr, a composite profile including narrow and broad components is seen as
reported by the previous single-dish observations. The spatial structure of the
broad component region of X Her shows a bipolar shape, and that of the narrow
component shows an elliptical/spherical shape. The blue- and red-shifted parts
of the X Her narrow component show a systematic difference in the velocity
integrated intensity map. The spatio-kinetic properties of the X Her narrow
component are reminiscent of a Keplerian rotating disk with a central mass of
0.9 Msun. The spatial distributions of both the narrow and the broad components
of EP Aqr appear to be roughly round with the same peak positions; no
significant velocity gradient is seen. The spatio-kinetic properties of EP Aqr
are reminiscent of a multiple-shell structure model rather than of a bipolar
flow and disk model.
