2000A&A...359..447B


Query : 2000A&A...359..447B

2000A&A...359..447B - Astronomy and Astrophysics, volume 359, 447-456 (2000/7-2)

Off-center nuclei in dwarf elliptical galaxies.

BINGGELI B., BARAZZA F. and JERJEN H.

Abstract (from CDS):

We have searched for off-center nuclei in 78 ``nucleated'' dwarf elliptical (dE,N) galaxies, drawing on digitized photographic images from a previous study of Virgo cluster dwarfs. The search is based on a simple algorithm which compares the center coordinates of a series of outer elliptical isophotes with the position of the galaxy's nucleus. Monte Carlo simulations of the measuring procedure are used to assess random and systematic errors. Roughly 20% of all dwarf nuclei in the sample (neglecting uncertain cases) are found to be significantly off-centered. The typical displacement is 1", or 100pc (assuming a Virgo cluster distance of 20Mpc), corresponding to 0.5 to 1 effective radii of the dwarf galaxy. There is a tendency of the nuclear off-center displacement to increase with decreasing surface brightness of the underlying galaxy. A similar trend was found with normal elliptical galaxies before. If real, the effect could mean that a nucleus can oscillate about the galaxy center with larger amplitude in a shallower (less cuspy) gravitational potential. In an appendix we present evidence for the existence of a strong, unambiguous relation between the nuclear magnitude and the ellipticity of dE,N galaxies. If a nucleus is comprising 4% or more of the total light of the underlying galaxy, that galaxy is nearly always round, i.e. ellipticity less than 0.15 (dE0, dE1). This effect was predicted qualitatively long ago as the result of box orbit disruption caused by a central massive compact object (black hole).

Abstract Copyright:

Journal keyword(s): galaxies: dwarf - galaxies: elliptical and lenticular, cD - galaxies: nuclei - galaxies: structure

Simbad objects: 83

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Number of rows : 83
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1266 1
2 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11792 1
3 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5488 1
4 LEDA 39080 G 12 14 14.430 +13 32 34.64   17       ~ 20 0
5 LEDA 39415 LSB 12 17 26.5446669288 +13 44 13.297175232   18       ~ 22 0
6 IC 781 GiG 12 20 03.2942086416 +14 57 41.415572916   14.8       ~ 57 0
7 LEDA 40083 LSB 12 22 24.302 +15 28 15.73   19       ~ 22 0
8 2MASX J12235767+1253130 GiC 12 23 57.7019192544 +12 53 13.659088596   16     14.0 ~ 30 0
9 MCG+02-32-032 GiC 12 24 51.626 +13 06 40.20   17 15.62   14.89 ~ 32 0
10 2MASX J12250351+1314403 GiC 12 25 03.4812590160 +13 14 40.886437128   16.35 15.59   14.86 ~ 30 0
11 LEDA 40479 LSB 12 25 13.1174082528 +13 01 31.524668364   18 16.93   15.87 ~ 29 0
12 IC 3303 GiG 12 25 15.1991817360 +12 42 52.784461080   15.1 14.24   13.29 ~ 76 0
13 LEDA 40534 GiC 12 25 33.535 +13 13 37.96   17.22 16.16   15.14 ~ 47 0
14 LEDA 40540 GiC 12 25 34.8335359824 +15 11 39.810376716   20       ~ 23 0
15 LEDA 40548 GiC 12 25 37.2090679392 +13 08 37.337258544   16.8 15.39   14.29 ~ 40 0
16 LEDA 40611 GiC 12 25 55.696 +12 46 10.98   18 16.91   16.05 ~ 25 0
17 IC 3328 GiP 12 25 57.9238048368 +10 03 13.552350912   14.9       ~ 151 0
18 IC 3331 GiG 12 26 05.3131857288 +11 48 43.968612492   15.2       ~ 41 0
19 MCG+02-32-045 GiC 12 26 05.643 +12 33 34.64   17 14.59   13.61 ~ 36 0
20 LEDA 40641 GiC 12 26 06.6837854016 +12 51 39.489536160   18 16.45   15.45 ~ 29 0
21 LEDA 40679 GiC 12 26 22.6098 +12 47 11.020   21 17.18   16.40 ~ 28 0
22 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6249 0
23 LEDA 40707 GiC 12 26 33.2021330472 +12 44 34.700132004   16.2 15.10   13.80 ~ 42 0
24 LEDA 40732 G 12 26 44.0103388608 +10 54 17.210974536   17       ~ 21 0
25 LEDA 40737 G 12 26 44.336 +08 49 25.32   19       ~ 24 0
26 LEDA 40739 G 12 26 44.4221430168 +11 22 47.061998040   16       ~ 22 0
27 IC 3349 GiG 12 26 47.0630055600 +12 27 14.345391348   15.3 13.98   12.95 ~ 80 0
28 LEDA 40759 G 12 26 54.552 +10 39 57.09   16       ~ 31 0
29 LEDA 40803 G 12 27 09.8983994736 +08 23 23.804955420   16.60       ~ 18 0
30 LEDA 40834 G 12 27 18.685 +08 12 46.38   16       ~ 24 0
31 NGC 4431 GiP 12 27 27.3817521552 +12 17 25.041554808 14.17 13.74 12.89     ~ 156 1
32 NGC 4436 GiP 12 27 41.2343736168 +12 18 57.193481304 14.20 13.91 12.98     ~ 121 1
33 LEDA 40917 G 12 27 46.268 +11 26 06.41           ~ 21 0
34 MCG+02-32-071 LSB 12 28 12.0176836440 +10 21 55.096853040   18       ~ 20 0
35 IC 3383 GiG 12 28 12.3076321056 +10 17 51.446913720   15.5 15.18     ~ 80 0
36 LEDA 40969 LSB 12 28 12.8241900792 +10 31 33.663404928   18       ~ 22 0
37 LEDA 40995 GiC 12 28 18.7272972408 +11 42 00.987629616   17 16.25   15.16 ~ 28 0
38 LEDA 41000 G 12 28 20.741 +08 00 41.93           ~ 16 0
39 LEDA 41007 GiC 12 28 23.678 +13 11 44.70   16 15.47   14.27 ~ 28 0
40 LEDA 41006 G 12 28 23.974 +11 25 13.58           ~ 21 0
41 IC 3388 GiG 12 28 28.0533797328 +12 49 25.325894568   15.4 14.73   13.73 ~ 67 0
42 LEDA 41053 G 12 28 41.495 +09 43 54.43   18       ~ 14 0
43 LEDA 41056 G 12 28 41.532 +07 48 15.25   17.61 16.92     ~ 20 0
44 IC 3393 GiG 12 28 41.7047406696 +12 54 57.265958916   14.85 14.24   13.19 ~ 103 1
45 MCG+02-32-085 LSB 12 29 08.152 +09 26 37.89   17       ~ 27 0
46 LEDA 1333286 G 12 29 14.6499081360 +07 52 39.046838556   16       ~ 27 0
47 MCG+02-32-086 G 12 29 15.2836638432 +08 48 52.073257824   15.6       ~ 21 0
48 GRDG +12 52 GiC 12 29 23.5156350432 +12 27 02.909896992   16 15.29   14.16 ~ 89 0
49 LEDA 41188 LSB 12 29 37.9957932696 +09 31 15.308996916   18       ~ 19 0
50 LEDA 41192 G 12 29 38.5028867808 +11 17 56.264726472   19       ~ 19 0
51 LEDA 41195 GiC 12 29 39.2416709208 +12 32 53.641361940   17 15.97   14.95 ~ 32 0
52 2MASX J12300506+0804241 G 12 30 05.0700348600 +08 04 23.971869048   16.82 15.13     ~ 72 0
53 LEDA 41273 GiC 12 30 10.887 +12 11 43.79   18 16.43   15.29 ~ 26 0
54 UGCA 283 GiG 12 30 31.985 +12 29 24.85   14.5       ~ 399 0
55 IC 3437 GiC 12 30 45.9003093456 +11 20 35.375795700   15.5       ~ 50 0
56 IC 3443 GiC 12 31 15.7337529840 +12 19 54.408896940   16.15 14.95   13.74 ~ 66 0
57 IC 3457 GiG 12 31 51.3438999336 +12 39 25.148930292   14.69 14.56   13.58 ~ 89 1
58 LEDA 41495 GiC 12 31 52.0049035536 +12 28 54.479630172   16.62 15.52   14.44 ~ 44 0
59 LEDA 41516 GiC 12 32 00.761 +12 37 13.10   17 16.39   15.20 ~ 32 0
60 IC 3461 GiG 12 32 02.747 +11 53 23.16   15.4 14.88   13.3 ~ 121 0
61 IC 3465 GiC 12 32 12.363 +12 03 39.78   16.93 16.16   14.6 ~ 40 0
62 LEDA 41593 G 12 32 35.873 +09 53 10.47   16       ~ 20 0
63 LEDA 41603 G 12 32 39.009 +10 05 31.46   16       ~ 24 0
64 LEDA 41607 G 12 32 42.6479419320 +15 54 35.549840268   16.55       ~ 18 0
65 IC 3486 GiG 12 33 14.026 +12 51 27.77   15.3       ~ 53 1
66 LEDA 41697 G 12 33 18.781 +09 07 13.92   20       ~ 18 0
67 LEDA 41720 G 12 33 31.6223840064 +09 27 33.186075768   17       ~ 21 0
68 LEDA 41744 GiC 12 33 48.6712769928 +12 46 48.069846552   19       ~ 24 0
69 IC 3506 GiC 12 34 06.739 +12 44 29.75   16.67 15.93   14.1 ~ 87 0
70 LEDA 41818 GiC 12 34 25.000 +12 54 16.64   18       ~ 17 0
71 LEDA 41822 GiC 12 34 26.045 +11 55 01.11   17     15.1 ~ 25 0
72 IC 3518 GiG 12 34 31.291 +09 37 24.36   15.3       ~ 44 0
73 LEDA 42046 G 12 36 24.7789709448 +10 23 04.828762356   16       ~ 74 0
74 LEDA 42136 GiC 12 37 22.150 +12 17 13.30   16     14.4 ~ 24 0
75 LEDA 42265 G 12 38 37.5678998664 +09 40 30.453235608   17       ~ 22 0
76 MCG+02-32-163 G 12 38 51.376 +09 49 12.78   18       ~ 16 0
77 LEDA 42357 G 12 39 30.041 +12 40 51.16   17       ~ 19 0
78 LEDA 42400 GiC 12 39 55.537 +11 51 28.50   17.4     16.1 ~ 18 0
79 IC 3633 GiG 12 40 11.2491451848 +09 53 46.054801392   15.4       ~ 71 0
80 IC 3647 GiG 12 40 52.6818722640 +10 28 35.428593144   15.3       ~ 68 0
81 IC 3663 GiC 12 41 39.412 +12 14 50.63   15.65     14.0 ~ 69 0
82 Z 70-221 G 12 41 54.6006433776 +09 35 04.532490168   15.3       ~ 35 0
83 LEDA 43119 G 12 46 55.4836147704 +10 10 56.641394928   16       ~ 22 0

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2022.05.22-23:10:43

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