3C 16


Basic Data
S178 Alpha FR Class ID Spectrum Best z mag. LAS lg P178 D
12.20.94IIR+HB Gal0.405R(c) = 19.5* 78.0026.55 336.4


Size: 76.8 × 76.8 arcsec²
LUT: Logarithmic
Beam: 1.25 arcsec
Frequency: 1477 MHz
Method: VTESS ՘>1.25
Telescope: VLA A+B
Credits: Leahy & Perley (1991)

3C 16 is highly asymmetric in brightness: the northern component is only visible in this picture because of the logarithmic LUT. It qualifies as a fat double because it has no true hotspots; but the bright diffuse component at the end of the south lobe makes it unusual for this class (and it is also the most luminous fat double known). The identification does not sit, as expected, between the two lobes but is in the middle of the south lobe, between the two brighter patches (which are too diffuse to be called jets). There is no radio core, and because of the peculiar position of the identification, there is some doubt as to whether it is correct.

A possible interpretation is that this is a DRAGN whose AGN has just died, and the southern hotspot has been caught in the act of expanding into the lobe, now that the jet has been cut off. Unfortunately, this explains neither the asymmetry of the lobes nor the position of the galaxy.

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Page created: 2009 Apr 2 14:16:42
J. P. Leahy