We present the results of observations of cold IRAS sources in the Galactic disk area , -10 ^ { \circ } < l < 100 ^ { \circ } and |b| < 5 ^ { \circ } , in the SiO J = 1 – 0 , v = 1 and 2 maser lines .
SiO masers were detected in 51 out of 143 observed sources ; 45 were new detections in SiO masers .
The selected IRAS sources were objects with dust temperatures of between 160 and 280 K. According to a confirmation using 2MASS near-infrared images , a majority of the sample are AGB or post-AGB stars , although dense cores in the star-forming regions ( or dusty H ii regions ) are involved in part of the sample .
Among new detections , two were candidates for post-AGB stars : IRAS 18450 - 0148 ( W 43A ) , and 19312 + 1950 .
We found that the intensity ratios of the SiO J = 1 – 0 , v = 2 to the v = 1 line of the objects clearly correlate with those IRAS colors .
The detection rates of SiO masers tend to increase toward the Galactic center as well as the cases of previous SiO maser surveys of typical AGB stars .
No strong associations of the objects to the spiral arms were found .
The radial-velocity dispersion of the present sample is comparable with the dispersion of the SiO maser sample of typical AGB stars .
These facts suggest that the present sample of cold IRAS sources with SiO masers has a kinematic property very similar with that of typical AGB stars .