Colour Profiles & Gradients

For each galaxy used to determine the vertical colour gradient a column with four plots is shown. The first plot shows the central vertical colour profile and four equipositioned cuts at the right side of the galaxy. The second plot shows the central vertical colour profile and four equipositioned cuts at the left side of the galaxy, the positions given in negative values. The third plot shows the selected part of the vertical colour profiles used for the fit of the gradient as taken from the first two plots. The fourth plot shows the profile normalized over the scaleheight. The presented profiles are unmatched to the average $z/z_n$ = 2 position and uncorrected for the galactic extinction, which will be done while determining the gradient.
In Tables A to F the gradient fit results for each individual cut are shown. The gradient fit results represent the observed values. The central ($J-K$) values are not matched for their average 2$z_n$ ($J-K$) and are also not corrected for the galactic extinction. These corrections were applied after the determination of all parameter results of the individual cuts.

Figure 37: IC 3322A	Figure 38: NGC 5290

Figure 39: IC 2531	Figure 40: NGC 0973

Figure 41: NGC 1886	Figure 42: UGC 4277

A: COLOUR GRADIENT FITS IC 2531

r	$\Delta_{J-K}$	$\Delta_{J-K}$	$z_n\Delta_{J-K}$	$J-K$	$\chi^2$
[$''$]	[Mag arcsec$^{-1}$]	[Mag arcmin$^{-1}$]	[Mag]	[Mag]
(1)	(2)	(3)	(4)	(5)	(6)
1.0	-0.007	-0.424	-0.032	0.964	43.9
10.0	-0.010	-0.605	-0.045	0.979	205.3
20.0	-0.009	-0.558	-0.042	0.997	49.6
30.0	-0.014	-0.848	-0.064	1.035	28.8
34.6	-0.016	-0.933	-0.070	1.043	6.7
-10.0	-0.005	-0.300	-0.023	0.971	33.9
-20.0	-0.026	-1.576	-0.118	1.094	22.2
-30.0	-0.030	-1.777	-0.134	1.147	33.4
-34.6	-0.024	-1.412	-0.106	1.082	15.0

B: COLOUR GRADIENT FITS IC 3322A

r	$\Delta_{J-K}$	$\Delta_{J-K}$	$z_n\Delta_{J-K}$	$J-K$	$\chi^2$
[$''$]	[Mag arcsec$^{-1}$]	[Mag arcmin$^{-1}$]	[Mag]	[Mag]
0.0	-0.006	-0.357	-0.021	0.804	39.1
12.7	-0.023	-1.389	-0.082	0.918	10.8
24.9	-0.043	-2.569	-0.152	1.044	6.2
37.6	-0.023	-1.368	-0.081	0.911	0.2
49.9	-0.067	-4.043	-0.239	1.112	0.9
-12.7	-0.006	-0.384	-0.023	0.771	10.5
-24.9	-0.040	-2.394	-0.141	1.024	13.6
-37.6	0.000	0.006	0.000	0.726	17.4
-49.9	0.001	0.039	0.002	0.787	2.6

C: COLOUR GRADIENT FITS NGC 0973

r	$\Delta_{J-K}$	$\Delta_{J-K}$	$z_n\Delta_{J-K}$	$J-K$	$\chi^2$
[$''$]	[Mag arcsec$^{-1}$]	[Mag arcmin$^{-1}$]	[Mag]	[Mag]
0.0	-0.006	-0.357	-0.027	0.998	89.6
10.0	-0.000	-0.021	-0.002	0.966	46.9
20.0	-0.002	-0.094	-0.007	0.957	37.6
30.0	0.001	0.071	0.005	0.950	9.4
34.6	0.022	1.297	0.097	0.900	4.5
-10.0	-0.004	-0.219	-0.016	1.017	32.3
-20.0	-0.006	-0.335	-0.025	1.046	24.5
-30.0	-0.001	-0.041	-0.003	1.002	7.5
-34.6	-0.011	-0.648	-0.049	1.061	0.7
Notes: (1) Radial position of the profile. (2)(3) ($J-K$) gradient. (4) ($J-K$) gradient over units of scaleheight. (5) ($J-K$) colour. (6) See Section 3.6 for a description.

D: COLOUR GRADIENT FITS NGC 1886

r	$\Delta_{J-K}$	$\Delta_{J-K}$	$z_n\Delta_{J-K}$	$J-K$	$\chi^2$
[$''$]	[Mag arcsec$^{-1}$]	[Mag arcmin$^{-1}$]	[Mag]	[Mag]
0.0	0.005	0.287	0.013	0.895	1.3
10.0	-0.009	-0.530	-0.024	0.970	0.5
20.0	-0.032	-1.907	-0.085	1.107	0.4
30.0	-0.007	-0.418	-0.019	0.963	0.9
34.6	-0.003	-0.209	-0.009	0.936	2.8
-10.0	-0.009	-0.548	-0.024	0.962	9.0
-20.0	-0.028	-1.695	-0.075	1.112	8.2
-30.0	-0.007	-0.442	-0.020	0.965	6.3
-34.6	-0.002	-0.124	-0.006	0.958	2.8

E: COLOUR GRADIENT FITS NGC 5290

r	$\Delta_{J-K}$	$\Delta_{J-K}$	$z_n\Delta_{J-K}$	$J-K$	$\chi^2$
[$''$]	[Mag arcsec$^{-1}$]	[Mag arcmin$^{-1}$]	[Mag]	[Mag]
0.0	-0.014	-0.859	-0.060	0.893	3.3
12.7	-0.023	-1.368	-0.096	0.993	23.1
24.9	-0.016	-0.974	-0.068	0.918	14.6
37.6	-0.009	-0.567	-0.040	0.854	3.1
49.9	-0.019	-1.114	-0.078	0.929	6.8
-12.7	-0.029	-1.747	-0.122	0.966	5.4
-24.9	-0.034	-2.036	-0.142	1.036	40.5
-37.6	-0.024	-1.429	-0.100	1.002	9.6
-49.9	-0.031	-1.844	-0.129	1.054	5.0

F: COLOUR GRADIENT FITS UGC 4277

r	$\Delta_{J-K}$	$\Delta_{J-K}$	$z_n\Delta_{J-K}$	$J-K$	$\chi^2$
[$''$]	[Mag arcsec$^{-1}$]	[Mag arcmin$^{-1}$]	[Mag]	[Mag]
0.0	-0.013	-0.789	-0.033	1.019	5.5
10.0	-0.019	-1.168	-0.049	1.051	1.2
20.0	-0.024	-1.420	-0.060	1.035	13.6
30.0	-0.035	-2.103	-0.088	1.163	8.1
34.6	-0.057	-3.427	-0.144	1.251	6.3
-10.0	-0.012	-0.718	-0.030	0.991	4.8
-20.0	-0.046	-2.763	-0.116	1.132	3.6
-30.0	-0.018	-1.082	-0.045	1.040	3.9
-34.6	-0.047	-2.797	-0.117	1.137	0.02
Notes: See Tables A-C.