For the inner square degree of the Coma cluster we selected 27 early-type galaxies from the complete catalogue of JF94. E and S0 galaxies were selected separately accordingly to the following strategy:
Table 1 lists all galaxies of
the selected spectroscopic sample and their photometric properties.
Numeros 1-27 correspond to the inner sample: The photometric
total gunn r magnitude from JK94 is converted to Kron-Cousins
using
= r - 0.35 (see Jørgensen 1994; J94).
Additionally the seeing
corrected values for the effective radius r
and the mean surface
brightness
inside
from
Jørgensen et al. (1995a, JFK95a) are
listed.
Different to BM87's approach, JK94 derived the fourth cosine coefficients
c4 normalized to the equivalent radius
where a and bare the semi-major and -minor axes. Hence the relation between
a4, which is normalized to the semi-major axis, and c4 is
Comparison with the
catalogue of JF94 shows that our inner sample (Nos. 1-27 in
Table 1) is complete to
and 42% complete in the range
corresponding to a
limiting
absolute magnitude of
MR>-21.73 mag (H0=50 Mpc/km s-1 and
km s-1). The
outer sample (Nos. 28-35 in Table 1) is
complete to
.
The mean effective radius of
the sample is
,
the average effective
surface brightness
mag/arcsec2, the mean
ellipticity
;
40% of the galaxies have significant disky (
)
isophotes
on the mean, while only two objects (6%) have
significant boxy (
)
isophotes.
The isophotes of the remaining 54% do not deviate significantly
from pure ellipses.
The sample
spans 3.1 decades in cluster density. Figure 2 shows the
histogram of galaxy types as a function of the projected cluster
distance D. Figure 3 shows the magnitudes of the galaxies as
a function of D.
No. | GMP No. | NGC/IC No. | DN | D |
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Type |
[''] | [mag] | [''] | [mag/arcsec2] | [%] | ||||||
1 | 3329 | NGC 4874 | 129 | 130.6 | 10.61 | 70.79 | 22.13 | +0.1 | 0.141 | D |
2 | 2921 | NGC 4889 | 148 | 304.8 | 10.64 | 33.88 | 20.64 | -0.4 | 0.360 | D |
3 | 4928 | NGC 4839 | 31 | 2528.4 | 11.45 | 29.51 | 21.18 | ![]() |
0.426 | E/S0 (D) |
4 | 4822 | NGC 4841A | 240 | 2533.4 | 11.78 | 17.87 | 20.39 | -0.4 | 0.157 | E |
5 | 1750 | NGC 4926 | 49 | 2111.2 | 12.27 | 10.96 | 19.79 | -0.1 | 0.132 | E |
6 | 2390 | IC 4051 | 143 | 927.7 | 12.34 | 15.56 | 21.02 | ![]() |
0.264 | E |
7 | 2795 | NGC 4895 | 206 | 939.7 | 12.49 | 10.00 | 19.86 | +0.9 | 0.599 | S0 |
8 | 3792 | NGC 4860 | 194 | 775.7 | 12.63 | 8.51 | 19.64 | +0.2 | 0.161 | E |
9 | 2629 | NGC 4896 | 232 | 1480.4 | 12.76 | 11.75 | 20.49 | +0.7 | 0.424 | S0 |
10 | 3561 | NGC 4865 | 179 | 528.7 | 12.82 | 5.13 | 18.77 | +0.6 | 0.429 | S0 |
11 | 2000 | NGC 4923 | 78 | 1480.8 | 12.86 | 8.51 | 19.88 | +0.2 | 0.182 | E |
12 | 2413 | - | 230 | 1675.2 | 12.88 | 7.76 | 19.72 | +0.5 | 0.405 | S0 |
13 | 4829 | NGC 4840 | 46 | 2184.3 | 12.93 | 6.46 | 19.35 | +0.5 | 0.163 | E/S0 |
14 | 3510 | NGC 4869 | 105 | 359.6 | 12.93 | 7.59 | 19.75 | +0.2 | 0.112 | E |
15 | 2417 | NGC 4908 | 167 | 916.7 | 12.97 | 7.08 | 19.60 | -0.2 | 0.322 | S0/E |
16 | 2440 | IC 4045 | 168 | 945.9 | 13.24 | 4.37 | 18.79 | +0.9 | 0.330 | E |
17 | 3414 | NGC 4871 | 131 | 208.6 | 13.27 | 8.32 | 20.24 | +1.1 | 0.410 | S0 |
18 | 4315 | NGC 4850 | 137 | 1104.0 | 13.36 | 4.68 | 19.07 | +0.2 | 0.212 | E/S0 |
19 | 3073 | NGC 4883 | 175 | 271.4 | 13.36 | 6.91 | 19.91 | +0.4 | 0.224 | S0 |
20 | 1853 | - | 190 | 1674.6 | 13.45 | 4.27 | 18.96 | +4.9 | 0.558 | S0 |
21 | 3201 | NGC 4876 | 124 | 210.2 | 13.51 | 5.13 | 19.47 | ![]() |
0.297 | E |
22 | 3661 | - | 13 | 2087.8 | 13.67 | 5.25 | 19.57 | +0.3 | 0.264 | S0 |
23 | 4679 | - | 75 | 1756.8 | 13.71 | 12.02 | 21.52 | +2.6 | 0.789 | S0 |
24 | 3352 | NGC 4872 | 130 | 170.3 | 13.75 | 3.02 | 18.53 | +0.6 | 0.054 | E/S0 |
25 | 2535 | IC 4041 | 145 | 742.0 | 13.81 | 7.41 | 20.52 | +0.4 | 0.443 | S0 |
26 | 3958 | IC 3947 | 72 | 971.3 | 14.00 | 3.31 | 19.00 | +1.6 | 0.323 | E |
27 | 2776 | - | 39 | 1567.4 | 14.06 | 5.76 | 20.25 | +0.3 | 0.177 | S0/E |
28 | 0144 | NGC 4957 | - | 4574.0 | 12.16![]() |
18.44 | 20.38 | +0.4 | 0.256 | E |
29 | 0282 | NGC 4952 | - | 5849.3 | 12.03![]() |
14.11 | 19.67 | +0.9 | 0.315 | E |
30 | 0756 | NGC 4944 | - | 33294 | 12.48
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11.68 | 19.71 | +0.7 | 0.657 | S0 |
31 | 1176 | NGC 4931 | - | 2601.1 | 13.21
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7.40 | 19.45 | +3.1 | 0.552 | S0 |
32 | 1990 | - | - | 4413.1 | 12.78
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9.45 | 19.55 | -0.6 | 0.485 | E/S0 |
33 | 5279 | NGC 4827 | - | 3737.1 | 12.33![]() |
13.61 | 19.90 | +0.1 | 0.205 | E |
34 | 5568 | NGC 4816 | - | 2937.6 | 11.50![]() |
55.72 | 22.13 | -0.1 | 0.284 | S0 |
35 | 5975 | NGC 4807 | - | 3764.5 | 12.89![]() |
6.67 | 18.91 | -0.8 | 0.170 | E |
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