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Session 104 - Radio Galaxies, Radio Observations of AGN Jets & Outflows.
Display session, Saturday, January 10
We present high dynamic range VLBA observations of NGC\,1275 (3C\,84) at 1414 MHz, 612 MHz, and 330 MHz. With these observations, we have discovered a previously undetected counterjet component located \sim80 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 milli-halo, centered around the nucleus, has an average diameter of \sim500 mas (120 h^-1 pc), and it is slightly elongated along the direction of the jet and counterjet. The milli-halo cannot be the result of scattering, and is most likely produced by synchrotron radiation from relativistic particles and magnetic fields that have diffused out from the parsec-scale jets over the lifetime of 3C\,84.
Program listing for Saturday