3C 315 | B1511+263 |
S178 | Alpha | FR | Class | ID | Spectrum | Best z | mag. | LAS | lg P178 | D |
---|---|---|---|---|---|---|---|---|---|---|
19.4 | 0.72 | I | RD/SSC | Gal | 0.1083 | R = 16.16 | 201.40 | 25.55 | 353.0 |
Image:
Size: | 256.0 × 256.0 arcsec² |
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LUT: | Logarithmic |
Beam: | 5.5 arcsec |
Frequency: | 1417 MHz |
Method: | CLEAN Õ˜ÿ>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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