SMASTES. II. KVN obs. SiO masers from S-type AGB stars

In particular, for v=1: J=1-0, J=2-1, and J=3-2 masers were all detected from five stars. For SiO v=0: J=1-0, J=2-1, and J=3-2 lines in ground vibrational state were detected from five, six, and seven stars, respectively, including the 29SiO v=0: J=1-0 and J=2-1 lines. For SiO v=0: J=1-0, J=2-1, and J=3-2 lines were detected in more stars at higher rotational transition lines.

The carbon-bearing molecule HCN was detected from four stars. Based on these observational results, we perform statistical analyses on detection rates of maser and thermal lines, maser properties, and kinematics comparing with the results of M-type stars (SMASTES I). The characteristics of maser properties are investigated in the IRAS two-color diagram in relation to the evolutionary stage.