Physical properties of very powerful FRII radio galaxies

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Table 1:

Comparison of hot spot spectral indices.
Source	$\alpha$ (2'', N)	$\alpha$ (1'', N)	$\alpha$ (2'', S)	$\alpha$ (1'', S)	$\alpha_{38-1400}$ (int)
(1)	(2)	(3)	(4)	(5)	(6)
3C 6.1	0.84	0.84	0.82	0.82	0.63
3C 34	0.81	0.78	0.84	0.88	1.07
3C 41	0.71	0.70	0.52	0.46	0.69
3C 44	0.89	1.00	0.90	0.96	0.94
3C 54	0.74	0.73	0.78	0.93	0.81
3C 114	0.82	0.98	0.84	0.98	0.90
3C 142.1	0.89	0.94	0.81	0.77	0.87
3C 169.1	0.79	...	0.77	0.91	0.88
3C 172	0.88	1.03	0.91	1.19	0.78
3C 441	0.65	0.57	0.95	0.88	0.82
3C 469.1	1.11	1.36	0.95	1.11	0.86

Column 1: source name, Cols. 2-5: the spectral index of the hotspot between 20 and 6 cm, Col. 2: 2-2.5 arcsec resolution, North side, Col. 3: 1.0 arcsec resolution, North side, Col. 4: 2-2.5 arcsec resolution, South side, Col. 5: 1.0 arcsec resolution, South side, Col. 6: spectral index from integrated flux densities at 38 and 1400 MHz. (Except for 3C 34 North and South are really East and West, respectively.)

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