We report the detection of extended low radio frequency continuum emission beyond the optical disk of the spiral galaxy NGC 4254 using the Giant Metrewave Radio Telescope .
NGC 4254 , which has an almost face-on orientation , is located in the outskirts of the Virgo cluster .
Since such extended emission is uncommon in low inclination galaxies , we believe it is a signature of magnetised plasma pushed out of the disk by ram pressure of the intracluster medium as NGC 4254 falls into the Virgo cluster .
The detailed spectral index distribution across NGC 4254 shows that the steepest spectrum \alpha < -1 ( S \propto \nu ^ { \alpha } ) arises in the gas beyond the optical disk .
This lends support to the ram pressure scenario by indicating that the extended emission is not from the disk gas but from matter which has been stripped by ram pressure .
The steeper spectrum of the extended emission is reminiscent of haloes in edge-on galaxies .
The sharp fall in intensity and enhanced polarization in the south of the galaxy , in addition to enhanced star formation reported by others provide evidence towards the efficacy of ram pressure on this galaxy .
HI 21cm observations show that the gas in the north lags in rotation and hence is likely the atomic gas which is carried along with the wind .
NGC 4254 is a particularly strong radio emitter with a power of 7 \times 10 ^ { 22 } Watts-Hz ^ { -1 } at 240 MHz .
We find that the integrated spectrum of the galaxy flattens at lower frequencies and is well explained by an injection spectrum with \alpha _ { 0 } = -0.45 \pm 0.12 .
We end by comparing published simulation results with our data and conclude that ram pressure stripping is likely to be a significant contributor to evolution of galaxies residing in X-ray poor groups and cluster outskirts .