2008AJ....135..747G

Query : 2008AJ....135..747G

2008AJ....135..747G - Astron. J., 135, 747-765 (2008/March-0)

HST/WFPC2 imaging of the circumnuclear structure of low-luminosity active galactic nuclei. I. Data and nuclear morphology.

GONZALEZ-DELGADO R.M., PEREZ E., CID FERNANDES R. and SCHMITT H.

Abstract (from CDS):

In several studies of low-luminosity active galactic nuclei (LLAGNs), we have characterized the properties of the stellar populations in LINERs and LINER/H II transition objects (TOs). We have found a populous class of galactic nuclei which stand out because of their conspicuous 0.1-1 Gyr populations. These nuclei are called "Young-TOs" since they all have TO-like emission line ratios. To advance our knowledge of the nature of the central source in LLAGNs and its relation with stellar clusters, we carry out several imaging projects with the Hubble Space Telescope (HST) at near-UV, optical, and near-IR wavelengths. In this Paper, we present the first results obtained with observations of the central regions of 57 LLAGNs imaged with the WFPC2 through any of the V (F555W, F547M, F614W) and I (F791W, F814W) filters that are available in the HST archive. The sample contains 34% of the LINERs and 36% of the TOs in the Palomar sample. The mean spatial resolution of these images is 10 pc. With these data we have built an atlas that includes structural maps for all the galaxies, useful to identify compact nuclear sources and, additionally, to characterize the circumnuclear environment of LLAGNs, determining the frequency of dust and its morphology. The main results obtained are as follows. (1) We have not found any correlation between the presence of nuclear compact sources and emission-line type. Thus, nucleated LINERs are as frequent as nucleated TOs. (2) The nuclei of "Young-TOs" are brighter than the nuclei of "Old-TOs" and LINERs. These results confirm our previous results that Young-TOs are separated from other LLAGNs classes in terms of their central stellar population properties and brightness. (3) Circumnuclear dust is detected in 88% of the LLAGNs, being almost ubiquitous in TOs. (4) The dust morphology is complex and varied, from nuclear spiral lanes to chaotic filaments and nuclear disk-like structures. Chaotic filaments are as frequent as dust spirals; but nuclear disks are mainly seen in LINERs. These results suggest an evolutionary sequence of the dust in LLAGNs, LINERs being the more evolved systems and Young-TOs the youngest.

Abstract Copyright: ∼

Journal keyword(s): dust, extinction - galaxies: active - galaxies: clusters: general - galaxies: nuclei - galaxies: structure

Simbad objects: 60

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Number of rows : 60
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 NGC 266 LIN 00 49 47.8149787992 +32 16 39.786194928 12.98 12.54 11.63     ~ 188 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 404 LIN 01 09 27.02 +35 43 05.3   12.56 11.73     ~ 473 0
4 NGC 428 AGN 01 12 55.709 +00 58 53.69   12.1   12.0 12.1 ~ 232 0
5 NGC 660 Sy2 01 43 02.350 +13 38 44.45   12.02 11.16     ~ 556 2
6 NGC 841 LIN 02 11 17.3713704624 +37 29 49.713829692   12.8       ~ 83 0
7 NGC 1161 Sy1 03 01 14.1715734192 +44 53 50.674920288   13.20 12.08     ~ 76 1
8 NGC 2685 Sy2 08 55 34.7027817000 +58 44 03.876540108   13.68 12.70     ~ 430 1
9 NGC 2787 LIN 09 19 18.6046606656 +69 12 11.630716128   12.92 11.79     ~ 354 0
10 NGC 2911 Sy2 09 33 46.10739467 +10 09 08.8215304   14.96 13.83     ~ 244 0
11 NGC 3166 GiP 10 13 45.7270131936 +03 25 29.310401424   11.2       ~ 234 0
12 NGC 3169 GiP 10 14 15.0379414272 +03 27 57.941639856   13.46 12.41     ~ 364 1
13 NGC 3226 GiP 10 23 27.0064075320 +19 53 54.674937420   14.32 13.33     ~ 428 1
14 NGC 3245 GiP 10 27 18.3864983136 +28 30 26.621599932   11.6       ~ 346 0
15 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 819 1
16 NGC 3489 GiG 11 00 18.5483994744 +13 54 04.206202668 11.46 11.12 10.29     ~ 400 1
17 NGC 3507 GiP 11 03 25.3619733360 +18 08 07.607343732   11.4       ~ 184 0
18 M 66 GiP 11 20 15.0 +12 59 29 9.85 9.65 8.92     ~ 1386 4
19 NGC 3675 GiG 11 26 08.5641089832 +43 35 09.587062464   11.04   9.57   ~ 284 1
20 NGC 3705 GiG 11 30 07.456 +09 16 35.87 12.00 11.86 11.07     ~ 174 1
21 M 109 GiG 11 57 35.9631479640 +53 22 29.006082336   10.94   9.57   ~ 457 0
22 NGC 3998 Sy2 11 57 56.1334044408 +55 27 12.922443432   11.64 12.10 10.09   ~ 643 2
23 NGC 4143 LIN 12 09 36.0679174440 +42 32 03.031963368   13.04 12.08     ~ 233 0
24 NGC 4150 GiG 12 10 33.655 +30 24 05.35 12.72 12.44 11.64     ~ 310 2
25 M 98 LIN 12 13 48.2910686976 +14 54 01.953475200 11.25 10.95 10.14     ~ 481 1
26 NGC 4203 LIN 12 15 05.0549203560 +33 11 50.383965120   12.98 11.99     ~ 492 2
27 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1223 0
28 M 61 Sy2 12 21 54.9282582888 +04 28 25.597367184 10.07 10.18 9.65     ~ 996 2
29 NGC 4314 LIN 12 22 32.0223000912 +29 53 43.814812200 11.72 11.43 10.58     ~ 479 1
30 M 100 AGN 12 22 54.9299993592 +15 49 20.296257960 10.04 10.05 9.35     ~ 1845 2
31 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6642 0
32 NGC 4429 GiG 12 27 26.5040002440 +11 06 27.588767616   11.4       ~ 317 0
33 NGC 4435 GiG 12 27 40.503 +13 04 44.48 12.23 11.74 10.80     ~ 445 2
34 NGC 4438 LIN 12 27 45.6705493536 +13 00 31.708096380 11.37 11.02 10.17     ~ 636 2
35 NGC 4450 LIN 12 28 29.5910654016 +17 05 05.976112020   10.90 10.08     ~ 563 2
36 NGC 4459 H2G 12 29 00.0329905416 +13 58 42.826603332   11.6       ~ 539 0
37 M 90 Sy2 12 36 49.8009839880 +13 09 46.523813040 10.56 10.26 9.54     ~ 898 1
38 NGC 4596 GiP 12 39 55.9544722920 +10 10 34.185047628   12.4       ~ 365 0
39 M 94 SyG 12 50 53.0737971432 +41 07 12.900884628 9.15 8.96 8.24 7.78   ~ 1386 2
40 M 64 SyG 12 56 43.696 +21 40 57.57   9.36 8.52     ~ 939 2
41 NGC 5005 GiP 13 10 56.312 +37 03 32.19   14.67 13.67     ~ 541 2
42 M 63 LIN 13 15 49.2741893928 +42 01 45.728076108   9.34 8.59 8.35   ~ 1223 2
43 NGC 5337 GiG 13 52 23.0212036056 +39 41 14.255519964   13.4   12.42   ~ 69 0
44 NGC 5377 AGN 13 56 16.6722507720 +47 14 08.568249072   12.39 11.46 10.87 10.25 ~ 230 1
45 NGC 5678 AGN 14 32 05.5700264952 +57 55 17.155392060   12.10       ~ 227 1
46 NGC 5879 AGN 15 09 46.7271710112 +57 00 00.538947900   11.9       ~ 247 1
47 NGC 5970 GiP 15 38 29.9475459984 +12 11 11.681818188   12.2       ~ 176 0
48 NGC 5982 LIN 15 38 39.778 +59 21 21.21   12.4       ~ 293 0
49 NGC 5985 SyG 15 39 37.0545742176 +59 19 55.216886664   15.24 14.22     ~ 249 0
50 NGC 6340 GiP 17 10 24.8346254376 +72 18 15.919996608   11.87 11.01     ~ 186 1
51 NGC 6384 AG? 17 32 24.2848390896 +07 03 37.531624968   13.2       ~ 304 0
52 NGC 6503 LIN 17 49 26.4207792072 +70 08 39.604132176 11.56 10.95 10.28 9.92   ~ 520 1
53 NGC 6500 LIN 17 55 59.78218885 +18 20 17.6673590   13.43 12.54     ~ 220 0
54 NGC 6703 AG? 18 47 18.8166660360 +45 33 02.274865812   12.29 11.34     ~ 217 0
55 NGC 6951 Sy2 20 37 14.1228088488 +66 06 20.049916392   11.64 10.65     ~ 526 2
56 NGC 7177 LIN 22 00 41.250 +17 44 17.22   12.2       ~ 199 1
57 NGC 7217 LIN 22 07 52.3984675584 +31 21 33.632293572   12.94 11.92     ~ 494 0
58 NGC 7331 LIN 22 37 04.0506038088 +34 24 56.800076508 10.65 10.35 9.48     ~ 1227 2
59 NGC 7626 rG 23 20 42.524 +08 13 01.43   12.8       ~ 426 1
60 NGC 7742 GiP 23 44 15.7534099368 +10 46 01.533226872   12.5       ~ 212 0

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