2001MNRAS.326.1141R

Query : 2001MNRAS.326.1141R

2001MNRAS.326.1141R - Mon. Not. R. Astron. Soc., 326, 1141-1148 (2001/September-3)

Structural evolution in elliptical galaxies: the age-shape relation.

RYDEN B.S., FORBES D.A. and TERLEVICH A.I.

Abstract (from CDS):

We test the hypothesis that the apparent axial ratio of an elliptical galaxy is correlated with the age of its stellar population. We find that old ellipticals (with estimated ages t>7.5Gyr) are rounder on average than younger ellipticals. The statistical significance of this shape difference is greatest at small radii; a Kolmogorov-Smirnov test comparing the axial ratios of the two populations at R=Re/16 yields a statistical significance greater than 99.96 per cent. The relation between age and apparent shape is linked to the core/power-law surface brightness profile dichotomy. Core ellipticals have older stellar populations, on average, than power-law ellipticals and are rounder in their inner regions. Our findings are consistent with a scenario in which power-law ellipticals are formed in gas-rich mergers, while core ellipticals form in dissipationless mergers, with cores formed and maintained by the influence of a binary black hole.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: photometry - galaxies: structure

Simbad objects: 75

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Number of rows : 75
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2154 2
2 NGC 315 LIN 00 57 48.88334410 +30 21 08.8119345 12.80 12.20 11.16 11.26   ~ 787 2
3 NGC 547 AGN 01 26 00.6208982520 -01 20 42.432452268   13.16 13.34     ~ 349 4
4 NGC 584 Sy2 01 31 20.7231919800 -06 52 04.770287472 11.93 11.44 10.48     ~ 402 2
5 NGC 636 EmG 01 39 06.5293238064 -07 30 45.475975296   12.5       ~ 190 0
6 2E 0150.5-1358 ClG 01 53 00.40 -13 44 18.0           ~ 387 0
7 NGC 720 Sy1 01 53 00.523 -13 44 19.25   12.4   10.36   ~ 522 0
8 NGC 821 AG? 02 08 21.1358498040 +10 59 41.832436704   12.210 11.310 10.739 9.744 ~ 572 0
9 NGC 1209 EmG 03 06 03.020 -15 36 40.58   12   11.42   ~ 145 0
10 NGC 1339 EmG 03 28 06.5493649512 -32 17 09.840527844   12.63   11.18   ~ 163 0
11 NGC 1373 GiP 03 34 59.1993515280 -35 10 15.879086760 14.44 14.03 13.26     ~ 129 1
12 NGC 1374 EmG 03 35 16.5885737352 -35 13 34.563417168 12.46 11.97 11.08 10.59   ~ 297 1
13 NGC 1379 GiP 03 36 03.9668625792 -35 26 28.547476800 12.17 12.04 10.91 10.60   ~ 265 1
14 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1570 1
15 NGC 1404 GiP 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 751 1
16 NGC 1419 GiG 03 40 42.1036600944 -37 30 38.778564456   13.56   12.07   ~ 138 0
17 NGC 1427 GiG 03 42 19.4455150392 -35 23 33.169251120   11.89   10.44   ~ 281 0
18 NGC 1453 EmG 03 46 27.2307890592 -03 58 07.831476768   13   11.30   ~ 180 0
19 IC 2006 EmG 03 54 28.4628183240 -35 58 01.673622516   12.39   10.94 11.9 ~ 207 0
20 NGC 1549 GiP 04 15 45.223 -55 35 32.50 11.22 10.48 9.79 9.08   ~ 240 1
21 NGC 1600 GiG 04 31 39.858 -05 05 09.97   8.9   10.81   ~ 381 0
22 NGC 1700 EmG 04 56 56.3160873072 -04 51 56.794713228   12   11.14   ~ 348 1
23 NGC 2778 GiP 09 12 24.3741783168 +35 01 39.140496840   13.1       ~ 287 0
24 NGC 2832 BiC 09 19 46.853 +33 44 59.07   13.3 13.17     ~ 264 3
25 NGC 2865 GiG 09 23 30.205 -23 09 41.37   12.39 11.43 11.06   ~ 240 0
26 NGC 3078 AGN 09 58 24.59498715 -26 55 35.9552427   12.00 11.07 10.51   ~ 156 0
27 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 775 1
28 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1463 0
29 NGC 3585 GiG 11 13 17.109 -26 45 17.96   10.64   9.22   ~ 289 0
30 NGC 3605 GiG 11 16 46.5896102400 +18 01 01.777666908   12.7       ~ 253 0
31 NGC 3608 LIN 11 16 58.967 +18 08 54.71   11.7       ~ 508 0
32 NGC 3818 EmG 11 41 57.3563891040 -06 09 20.459153376   13   11.78   ~ 178 0
33 NGC 4073 BiC 12 04 27.0598775760 +01 53 45.611893752   13.8 13.21 14.249   ~ 200 1
34 NGC 4239 GiG 12 17 14.9402986344 +16 31 52.731777360   13.5       ~ 122 0
35 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1223 0
36 NGC 4278 LIN 12 20 06.8242 +29 16 50.722 11.54 11.09 10.16     ~ 946 2
37 NGC 4339 GiP 12 23 34.9398092592 +06 04 54.467043780   13.1       ~ 242 0
38 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1762 2
39 NGC 4387 GiG 12 25 41.6768484264 +12 48 37.804615956 13.42 13.01 12.12   10.87 ~ 392 1
40 NGC 4458 GiP 12 28 57.5613938232 +13 14 30.946545276 13.27 12.93 12.07     ~ 413 2
41 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2093 2
42 NGC 4478 GiP 12 30 17.4160005576 +12 19 42.790577160 12.82 12.36 11.45   10.17 ~ 490 1
43 NGC 4489 GiG 12 30 52.2472748976 +16 45 31.866359004   13.2       ~ 252 0
44 NGC 4551 GiP 12 35 37.9542692328 +12 15 50.284593432 13.49 12.97 12.02     ~ 354 1
45 M 89 LIN 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 995 2
46 NGC 4564 GiG 12 36 26.9869512504 +11 26 21.204472848 12.51 12.05 11.12     ~ 595 1
47 M 60 GiP 12 43 39.9680 +11 33 09.696   10.3       ~ 1348 1
48 NGC 4697 GiG 12 48 35.8981498824 -05 48 02.482374564   10.97   9.83   ~ 859 0
49 NGC 4839 rG 12 57 24.3563164776 +27 29 52.203087132 13.56 13.02 12.06     ~ 466 3
50 NGC 4860 GiG 12 59 03.9057463440 +28 07 25.326557148 14.84 14.7 13.24     ~ 154 0
51 NGC 4869 rG 12 59 23.3588349024 +27 54 41.731884360 15.03 14.9 13.52 13.292 12.536 ~ 278 0
52 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 11.40 12.122 11.386 ~ 780 3
53 NGC 4876 LIN 12 59 44.4043327032 +27 54 44.883805032 15.61 15.1 14.18 13.992 13.333 ~ 149 0
54 IC 4045 AGN 13 00 48.6521997192 +28 05 26.675160468 15.25 15.1 13.77 13.573 12.895 ~ 148 0
55 NGC 4908 LIN 13 00 51.5428778808 +28 02 34.346182596 15.05 14.9 13.58 13.273 12.566 ~ 121 0
56 IC 4051 EmG 13 00 54.4630403184 +28 00 27.502143300 15.04 14.8 13.50 13.003 12.305 ~ 213 0
57 NGC 4926 LIN 13 01 53.7302453520 +27 37 28.027389360   14.1       ~ 157 0
58 NGC 4952 LIN 13 04 58.3849361808 +29 07 20.011981188   13.39 13.01     ~ 94 1
59 NGC 4957 GiG 13 05 12.3897926664 +27 34 11.130658716   14.2   14.62   ~ 90 0
60 NGC 5018 GiP 13 13 01.0452720960 -19 31 05.649751992   11.71   10.31   ~ 313 1
61 NGC 5638 GiP 14 29 40.3717451400 +03 13 59.987811648 12.57 12.14 11.20     ~ 243 2
62 NGC 5812 EmG 15 00 55.708 -07 27 26.33   12   11.19   ~ 159 0
63 NGC 5831 GiG 15 04 07.0002600408 +01 13 11.705607012   13.1   11.19   ~ 294 0
64 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 849 1
65 ESO 274-6 GiP 15 16 09.9432209376 -44 00 53.292791736   14.53   12.59   ~ 22 0
66 NGC 6125 AG? 16 19 11.5344941208 +57 59 02.863041504   13.0       ~ 101 0
67 NGC 6702 AG? 18 46 57.5835209136 +45 42 20.305242180 15.30 14.73 13.05     ~ 142 0
68 NGC 6958 AG? 20 48 42.6064604520 -37 59 50.876997504 12.79 12.27 11.42 10.83   ~ 156 1
69 NGC 7052 rG 21 18 33.0441963648 +26 26 49.174586196 15.52 14.85 13.09     ~ 323 1
70 NGC 7454 GiG 23 01 06.5120307216 +16 23 18.484008792   13.6       ~ 147 0
71 NGC 7562 GiP 23 15 57.4982037648 +06 41 15.227839176   13.0       ~ 166 0
72 NGC 7619 GiG 23 20 14.524 +08 12 22.63   12.7       ~ 449 0
73 NGC 7626 rG 23 20 42.524 +08 13 01.43   12.8       ~ 426 1
74 IC 5358 BiC 23 47 45.1086508608 -28 08 26.650470372   13.42 14.72 11.99   ~ 86 1
75 NGC 7785 AG? 23 55 19.0388560224 +05 54 56.735224164   13.00       ~ 175 0

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