A Radio Millihalo in the Nucleus of NGC 1275

Details A Radio Millihalo in the Nucleus of NGC 1275 A Radio Millihalo in the Nucleus of NGC 1275

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...502..229s&link_type=abstract

Astrophysical Journal v.502, p.229

Astronomy and Astrophysics

Astronomy

16

Galaxies: Active, Galaxies: Individual Ngc Number: Ngc 1275, Galaxies: Jets, Radio Continuum: Galaxies, Galaxies: Nuclei, Galaxies: Halos

Scientific paper

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.

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