The Parsec-Scale Structure of NGC 1275 at 1.3 GHz

Details The Parsec-Scale Structure of NGC 1275 at 1.3 GHz The Parsec-Scale Structure of NGC 1275 at 1.3 GHz

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...457l..69t&link_type=abstract

Astrophysical Journal Letters v.457, p.L69

Astronomy and Astrophysics

Astronomy

19

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

Scientific paper

We present a high dynamic range Very Long Baseline Array (VLBA) image of 3C 84 at 1.3 GHz. With these observations we have discovered a previously undetected component that is centered ~65 mas to the south of the compact core and has a diameter of ~40 mas. The nucleus of 3C 84 thus displays radio emission without interruption from the core out to a total length of 0."1 (24 h-1 pc), which is clear evidence for activity of the central engine in the centuries preceding the latest large outburst in 1960. From the absence of significant emission to the north of the core we find that the free-free optical depth at 1.3 GHz is likely to be >=3.7 at a projected distance of 3.5 h-1 pc.

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