3C 315


Basic Data
S178 Alpha FR Class ID Spectrum Best z mag. LAS lg P178 D
19.40.72IRD/SSC Gal0.1083R = 16.16 201.4025.55 353.0


Size: 256.0 × 256.0 arcsec²
LUT: Logarithmic
Beam: 5.5 arcsec
Frequency: 1417 MHz
Method: CLEAN ՘>5.5
Telescope: VLA B+C
Credits: Leahy, Pooley & Riley (1986)

This is the prototype X-shaped or winged DRAGN. Unlike most other cases, there are no true hotspots in either pair of lobes, although there is a modest "warmspot" about three-quarters of the way to the end of the NNE lobe. The lobes on this axis are better-defined and less curved, suggesting that they were created by the most recent large-scale outburst.

The bright spot in the centre is a kilo-parsec sized steep-spectrum core (there is a map on the Other Images page). The core looks like a minature classical double, aligned in the NNE-SSW direction of the main lobes. It is not clear where in the SSC structure the true compact core lies: there are several apparently compact features near the noise level, but an image at a higher frequency is needed to reveal which one has a flat spectrum.

The host galaxy is highly elongated, roughly parallel to the main radio axis. It has a companion elliptical galaxy to the south which is comparably bright, and this double system is in a cluster. The HST images suggest obscuration of the nucleus (de Koff et al. 2000, Capetti et al. 2000).

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Page created: 2009 Apr 2 14:16:43
J. P. Leahy