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Radio observations can show how cluster galaxies are affected by variousenvironmental factors. We made three frequency radio-polarimetric VLAobservations and performed sensitive XMM-Newton observations in X-rays and UVlight of NGC4254. The distribution of total radio intensity at 8.46 4.86 GHzreveals a global asymmetry with a more diffuse and almost two times largerextension to the north than to the south. The radio polarized intensity is evenmore asymmetric, showing a strange bright ridge in the southern disk edge,displaced to the downstream side of the local density wave. Magnetic arms canbe also seen in other disk portions, mostly avoiding nearby optical spiralarms. Spatially resolved emission of hot X-ray gas from the whole galacticdisk, with its soft component closely tracing star-forming regions, isdetected. The slope of the local radio nonthermal-infrared relation is <1, thussmaller than for the radio thermal-infrared one (>1). Using the radio thermalemission-based star formation rate (SFR) we find higher extinction in moreHalpha luminous star-forming regions with a power-law slope of 0.83. Thegalaxy's estimated mean SFR of 0.026 M_sun/yr/kpc^2 is three times larger thanin other spirals of similar Hubble type. NGC4254 seems to belong to the classof `young' Virgo cluster members, which recently experienced a gravitationalencounter at the cluster's periphery, which perturbed its spiral arms by tidalforces and triggered a burst of star-formation which still maintains strongradio and infrared emissions. Tidal forces could also sheared the magneticfield in the southern disk portion and led to the observed polarized ridge,though, magnetic field compression by weak ram pressure forces of the clustergas cannot be excluded.

Magnetic fields and gas in the cluster influenced spiral galaxy NGC4254 - I. Radio and X-rays observations