We have carried out a detailed analysis of the NANTEN ^ { 12 } CO ( J =1–0 ) dataset at 4-arcmin resolution in two large areas of \sim 25 square degrees towards SS433 ( l \sim \timeform 40D ) and of \sim 18 square degrees towards l \sim \timeform 348D.5 , respectively .
We have discovered two groups of remarkably aligned molecular clouds at high galactic latitudes of \mid b \mid \sim \timeform 1D– \timeform 5D in the two regions .
In SS433 , we have detected 10 clouds in total , which are well aligned nearly along the axis of the X-ray jet emanating from SS433 .
These clouds have similar line-of-sight velocities of 42 – 56 km s ^ { -1 } in V _ { LSR } and the total projected length of the feature is \sim 300 pc , three times larger than that of the X-ray jet , at a distance of 3 kpc .
Towards l \sim \timeform 348D.5 , we have detected four clouds named as MJG348.5 at line-of-sight velocities of - 80 – - 95 km s ^ { -1 } in V _ { LSR } , which also show alignment nearly perpendicular to the Galactic plane .
The total length of the feature is \sim 400 pc at a kinematic distance of 6 kpc .
In the both cases , the CO clouds are distributed at high galactic latitudes , \mid b \mid \sim \timeform 1D– \timeform 5D , where such clouds are very rare .
In addition , their alignments and coincidence in velocity should be even rarer , suggesting that they are physically associated .
We tested a few possibilities to explain these clouds , including protostellar outflows , supershells , and interactions with energetic jets .
Among them , a favorable scenario is that the interaction between relativistic jet and the interstellar medium induced the formation of molecular clouds over the last \sim 10 ^ { 5 - 6 } yrs .
It is suggested that the timescale of the relativistic jet may be considerably larger , in the order of 10 ^ { 5 - 6 } yrs , than previously thought in SS433 .
The driving engine of the jet is obviously SS433 itself in SS433 , although the engine is not yet identified in MJG348.5 among possible several candidates detected in the X-rays and TeV gamma rays .