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We have observed the radio source NGC 3862 (3C264) simultaneously with theEVN and the MERLIN arrays, obtaining detailed images of its radio structurefrom parsec to sub-kiloparsec scales. 3C264 shows a one-sided jet, with evidentvariations in its morphological properties with distance. We have analyzed HSToptical data of NGC 3862 finding a one-to-one correspondence between radio andoptical features in the jet. The radio to optical spectral index isapproximately constant along the jet. Synchrotron appears as the most plausiblemechanism for the observed jet emission at radio and optical wavelengths. Localparticle reacceleration or, alternatively, deviation from the condition ofequipartition, are plausible mechanisms to explain the low synchrotron coolingand constant spectral index in the jet of 3C264.Comment: 5 figures - Accepted for the publication in the Astrophysical Journa

The Radio‐Optical Jet in NGC 3862 from Parsec to Subkiloparsec Scales