1999ApJ...523..566C


Query : 1999ApJ...523..566C

1999ApJ...523..566C - Astrophys. J., 523, 566-574 (1999/October-1)

The centers of early- to intermediate-type spiral galaxies: a structural analysis.

CAROLLO C.M.

Abstract (from CDS):

A recent Hubble Space Telescope (HST)/WFPC2 visual survey of early- and intermediate-type spiral galaxies has unveiled a great complexity in the inner regions of these systems, which include a high fraction of photometrically distinct compact sources sitting at the galactic centers (``nuclei''). The faint nuclei (MV≳-12) are typically hosted by rather amorphous, quiescent, bulgelike structures with an exponential (rather than the classical R1/4) light profile. These ``exponential bulges'' are commonly found inside the intermediate-type disks, consistent with previous studies. Brighter nuclei (MV≲-12) are typically found instead in the centers of galaxies with circumnuclear rings/arms of star formation or dust and an active, i.e., H II- or AGN-type, central spectrum at ground-based resolution. On the structural plane of half-light radius (Re) versus mean surface brightness within the half-light radius (µe), faint and bright nuclei overlap with, and fill the region of parameter space between, the old Milky Way globular clusters and the young star clusters, respectively, with typical Re of about a few up to ~20 pc. On the same plane, the exponential bulges have significantly fainter µe than R1/4 bulges for any given radius and follow a µe-Re relation typical of disks, which strengthens the suggestion that the exponential bulges grow inside the disks as a result of the secular evolution of the latter. Under the likely assumption that the visual light from the faint nuclei embedded in the quiescent exponential bulges is of stellar origin and of a similar (≳1 Gyr) age for the central star clusters and their host bulges, the masses inferred for the former agree with those required to disrupt bars comparable in size to the latter. This offers support to scenarios in which the exponential bulges grow inside the disks owing to the orbital disruption of progenitor bars caused by the growth of a central concentration of mass and suggests that this specific mode of bulge formation is (still) active in the present-day universe. On the other hand, the presence of the massive clusters at the very center of the low-density exponential bulges should prevent any other ``nuclear'' bar from forming, thereby preventing further infall of dissipative fuel to the nuclear regions. This may argue against the possibility of evolving the exponential bulges into denser, R1/4 bulges by a simple looping for several cycles of the bar formation/disruption mechanism.

Abstract Copyright:

Journal keyword(s): Galaxies: Evolution - Galaxies: Formation - 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 - 2023
#notes
1 IC 1555 EmG 00 34 32.743 -30 01 04.60   14.39   13.47 14.1 ~ 49 0
2 NGC 406 G 01 07 25.060 -69 52 45.27   13.02   12.14 12.0 ~ 82 0
3 NGC 488 GiG 01 21 46.7967133224 +05 15 24.623017524   15.0       ~ 284 0
4 NGC 986 EmG 02 33 34.3087856832 -39 02 42.128176704 11.72 11.74 10.91 10.10 11.3 ~ 179 1
5 NGC 1325 GiP 03 24 25.5769895640 -21 32 38.626241964   12.28 11.55 11.13 11.6 ~ 161 0
6 ESO 548-10 GiP 03 24 48.5 -21 20 10   13.33 12.83 12.52 13.1 ~ 61 0
7 NGC 1345 EmG 03 29 31.694 -17 46 42.04   13.67   12.96 13.6 ~ 90 0
8 ESO 548-29 GiG 03 30 47.162 -21 03 29.64   14.23   13.16   ~ 36 0
9 NGC 1353 EmG 03 32 03.024 -20 49 08.98   12.19 11.35 10.77   ~ 121 0
10 NGC 1385 EmG 03 37 28.323 -24 30 04.60 11.28 11.50 10.94 10.45 11.7 ~ 246 2
11 ESO 482-17 LSB 03 37 43.3466112456 -22 54 29.630832192   15.11   13.85   ~ 28 0
12 ESO 549-18 LSB 03 48 14.0636570472 -21 28 27.908585652   13.60   12.09   ~ 74 0
13 NGC 1483 GiG 03 52 47.608 -47 28 39.06   13.23   13.2 13.0 ~ 76 0
14 NGC 1640 G 04 42 14.5058689872 -20 26 05.190613476   12.51 11.72 11.22 12.1 ~ 111 0
15 NGC 1688 GiG 04 48 23.789 -59 48 01.11   12.57   11.82 12.1 ~ 75 0
16 NGC 1892 GiG 05 17 09.0127062984 -64 57 34.791231996   12.72   11.9 11.8 ~ 72 0
17 NGC 2082 GiG 05 41 51.0901098120 -64 18 03.828857148   12.79   11.45 11.6 ~ 92 0
18 NGC 2104 EmG 05 47 04.772 -51 33 10.61   13.52   12.27 13.1 ~ 54 0
19 ESO 205-7 G 05 54 14.6678912760 -51 58 35.299088436   15.26   13.68   ~ 22 0
20 NGC 2196 EmG 06 12 09.6565312104 -21 48 21.667049928   11.98   10.69 11.4 ~ 105 0
21 NGC 2339 H2G 07 08 20.5343958360 +18 46 48.812128644   12.3       ~ 139 1
22 NGC 2344 rG 07 12 28.6727815248 +47 10 00.302868408   12.99 12.14 11.57 10.80 ~ 89 0
23 NGC 2397 GiG 07 21 19.8926907744 -69 00 05.031850284   12.85   11.57   ~ 88 0
24 NGC 2460 AGN 07 56 52.3308252792 +60 20 57.759748944   12.5       ~ 125 0
25 NGC 2758 EmG 09 05 31.2006079368 -19 02 33.697810140   13.99   13.32 14.0 ~ 47 0
26 NGC 2748 GiG 09 13 43.03707 +76 28 31.2310   11.7       ~ 192 0
27 ESO 498-5 GiG 09 24 40.6523073480 -25 05 33.764740620   14.23   13.05   ~ 40 0
28 NGC 2964 GiP 09 42 54.251 +31 50 49.97   12.0       ~ 266 1
29 NGC 3045 EmG 09 53 17.6604331464 -18 38 42.337800960   13.73   12.72 13.2 ~ 43 0
30 NGC 3054 GiG 09 54 28.5871599144 -25 42 12.369525732   12.27   10.92 11.4 ~ 140 0
31 NGC 3067 GiG 09 58 21.0726714528 +32 22 12.012636108   12.7       ~ 235 1
32 ESO 499-37 G 10 03 41.840 -27 01 40.12   13.32   12.81 13.3 ~ 58 1
33 NGC 3177 AGN 10 16 34.1454628296 +21 07 23.000346984   12.8       ~ 139 0
34 ESO 317-20 GiG 10 23 07.5772093800 -42 14 15.170385480   13.17   12.71 13.1 ~ 36 0
35 NGC 3259 Sy1 10 32 34.8614764344 +65 02 27.906884844   17.55 16.89     ~ 150 0
36 NGC 3277 Sy2 10 32 55.4484213912 +28 30 42.279280956 12.74 12.50 11.68     ~ 133 1
37 NGC 3455 GiP 10 54 31.0921117824 +17 17 04.985473704   13.1       ~ 154 0
38 NGC 3885 EmG 11 46 46.4536031880 -27 55 20.056518516 12.19 12.68 11.89 11.46   ~ 125 1
39 NGC 3900 GiP 11 49 09.4563144120 +27 01 19.276393872   12.5       ~ 175 0
40 NGC 3898 LIN 11 49 15.370 +56 05 03.66   11.7       ~ 291 1
41 NGC 3928 AGN 11 51 47.6194275264 +48 40 59.261680020   13.1       ~ 169 0
42 ESO 572-22 GiG 11 56 22.496 -19 33 07.45   15.00   13.89 14.4 ~ 43 0
43 NGC 4030 GiP 12 00 23.6102390784 -01 06 00.197099136   11.42   10.3 10.4 ~ 318 1
44 NGC 4102 LIN 12 06 23.115 +52 42 39.42   11.8       ~ 405 1
45 NGC 4219 G 12 16 27.312 -43 19 27.41   12.71 11.31 11.09 11.9 ~ 71 0
46 NGC 4260 GiP 12 19 22.2401274336 +06 05 55.291593192   13.1       ~ 158 0
47 NGC 4384 EmG 12 25 12.012 +54 30 22.07   13.5       ~ 117 1
48 M 88 Sy2 12 31 59.1525062448 +14 25 13.148971824   14.33 13.18     ~ 771 1
49 NGC 4750 LIN 12 50 07.3113940944 +72 52 28.653179520   11.8       ~ 130 0
50 NGC 4806 G 12 56 12.3990039936 -29 30 10.005678108   13.44   12.52   ~ 61 0
51 NGC 4980 EmG 13 09 10.082 -28 38 30.44   13.53   12.75 13.6 ~ 63 0
52 ESO 443-80 G 13 11 09.59 -28 00 37.2   14.14   13.52 14.2 ~ 56 0
53 ESO 508-34 G 13 16 57.4 -25 20 15   14.84   13.73 14.6 ~ 39 0
54 IC 4222 GiG 13 19 40.5898644384 -27 25 43.779398916   14.01   12.93   ~ 34 0
55 NGC 5121 G 13 24 45.6281452848 -37 40 55.892160696   12.54 11.41 10.82 11.8 ~ 71 0
56 NGC 5188 GiG 13 31 28.293 -34 47 40.10   12.68 11.85     ~ 80 0
57 NGC 5377 AGN 13 56 16.6722507720 +47 14 08.568249072   12.39 11.46 10.87 10.25 ~ 220 1
58 NGC 5448 LIN 14 02 50.072 +49 10 21.53   12.7       ~ 156 0
59 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1127 2
60 IC 4390 GiG 14 16 59.180 -44 58 38.52   13.81   12.69   ~ 34 0
61 NGC 5689 GiP 14 35 29.7025058208 +48 44 29.759376048   12.7       ~ 121 0
62 NGC 5806 AGN 15 00 00.4088018736 +01 53 28.779594792   12.40 11.70 10.94 11.6 ~ 270 1
63 NGC 5879 AGN 15 09 46.7271710112 +57 00 00.538947900   11.9       ~ 239 1
64 NGC 5985 SyG 15 39 37.0545742176 +59 19 55.216886664   15.24 14.22     ~ 239 0
65 NGC 6000 AGN 15 49 49.556 -29 23 12.50   13.02   11.27 12.0 ~ 105 1
66 NGC 6239 GiC 16 50 05.028 +42 44 23.44 12.75 12.94 12.45     ~ 81 1
67 NGC 6340 GiP 17 10 24.8346254376 +72 18 15.919996608   11.87 11.01     ~ 182 1
68 NGC 6384 G 17 32 24.2848390896 +07 03 37.531624968   13.2       ~ 296 0
69 NGC 6810 Sy2 19 43 34.4178888528 -58 39 20.192400540   12.34 11.22 10.71   ~ 150 0
70 NGC 7013 G 21 03 33.5698770000 +29 53 50.926694208   12.9       ~ 134 0
71 NGC 7280 GiP 22 26 27.5758899936 +16 08 53.421593496   13.6       ~ 154 0
72 IC 5256 G 22 49 45.8354641248 -68 41 26.642370948 15.44 15.00 14.42 14.16   ~ 24 0
73 NGC 7421 GiG 22 56 54.3533970816 -37 20 50.437978152 12.61 12.64 11.93 11.71 12.1 ~ 118 1
74 NGC 7690 G 23 33 02.5954925352 -51 41 54.018353580   12.93 12.01 12.19 12.6 ~ 66 0
75 ESO 240-12 G 23 38 49.6480565352 -51 51 35.363762280   14.35   13.64 14.1 ~ 30 0

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2023.01.28-11:47:23

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