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A Radio Millihalo in the Nucleus of NGC 1275

We present high dynamic range (20,000:1 at 1414 MHz) VLBA observations of NGC 1275 (3C 84) at 1414, 612, and 330 MHz. With these observations, we have discovered a previously undetected counterjet component located ~80 mas (20 h-1 pc) to the north of the compact core. This counterjet component, like those closer in to the nucleus, appears to be free-free absorbed. We have also discovered the first radio halo around an active galactic nucleus on small (<1 kpc) scales. This millihalo cannot be the result of scattering and is most likely produced by synchrotron radiation from relativistic particles that have diffused out from the parsec-scale jets over the lifetime of 3C 84.