2008A&A...487..177Z

Query : 2008A&A...487..177Z

2008A&A...487..177Z - Astronomy and Astrophysics, volume 487177-183 (2008/8-3)

Stellar and dust properties of local elliptical galaxies: clues to the onset of nuclear activity.

ZHANG Y., GU Q.-S. and HO L.C.

Abstract (from CDS):

We study the stellar and dust properties of a well-defined sample of local elliptical galaxies to investigate the relationship between host galaxy properties and nuclear activity. We have selected a complete sample of 45 ellipticals from the Palomar spectroscopic survey of nearby galaxies, which includes 20 low-luminosity active galactic nuclei classified as LINERs and 25 inactive galaxies. Using a stellar population synthesis method, we compared the derived stellar population properties of the LINER to the inactive subsamples. We also studied the dust and stellar surface brightness distributions of the central regions of these galaxies using high-resolution images obtained with the Hubble Space Telescope. Compared with the inactive subsample, ellipticals hosting LINERs share similar total optical and near-infrared luminosity, central stellar velocity dispersions, and nuclear stellar populations as judged from their luminosity-weighted ages and metallicities. LINERs, on the other hand, have a larger fraction of core-type central surface brightness profiles and a much higher frequency of circumnuclear dust structures. Our results support the suggestion that LINERs are powered by low-luminosity AGNs rather than by young or intermediate-age stars. Nuclear activity in nearby elliptical galaxies seems to occur primarily in those systems where enough cold interstellar material has managed to accumulate, perhaps via cooling condensations from hot gas.

Abstract Copyright: ∼

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: active - galaxies: stellar content

Simbad objects: 45

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Number of rows : 45
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
2 NGC 315 LIN 00 57 48.88334410 +30 21 08.8119345 12.80 12.20 11.16 11.26   ~ 869 2
3 NGC 821 AG? 02 08 21.1358498040 +10 59 41.832436704   12.210 11.310 10.739 9.744 ~ 592 0
4 NGC 1052 Bla 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1397 2
5 NGC 2634 GiP 08 48 25.3648660440 +73 58 01.883152560   12.6       ~ 100 0
6 NGC 2768 SyG 09 11 37.504 +60 02 13.95 11.30 10.84 9.87     ~ 526 2
7 NGC 2832 LIN 09 19 46.853 +33 44 59.07   13.3 13.17     ~ 274 3
8 NGC 3193 GiP 10 18 24.884 +21 53 38.32 12.29 11.83 10.88 12.19   ~ 301 1
9 NGC 3226 rG 10 23 27.0064075320 +19 53 54.674937420   14.32 13.33     ~ 440 1
10 NGC 3348 GiG 10 47 10.0367649672 +72 50 22.685834940   12.0       ~ 127 0
11 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 798 1
12 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1504 0
13 NGC 3608 LIN 11 16 58.967 +18 08 54.71   11.7       ~ 527 0
14 NGC 3610 GiG 11 18 25.2827189856 +58 47 10.433735988   11.4       ~ 327 0
15 NGC 3613 GiG 11 18 36.130 +57 59 59.73   11.6       ~ 221 0
16 NGC 3640 GiG 11 21 06.852 +03 14 05.15 11.89 11.36 10.44     ~ 291 3
17 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1290 0
18 NGC 4278 LIN 12 20 06.8242 +29 16 50.722 11.54 11.09 10.16     ~ 988 2
19 NGC 4291 GiG 12 20 17.699 +75 22 15.47   17.0       ~ 321 1
20 NGC 4339 GiP 12 23 34.9398092592 +06 04 54.467043780   13.1       ~ 255 0
21 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 871 0
22 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1841 2
23 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1126 1
24 NGC 4473 GiG 12 29 48.878 +13 25 45.55 11.60 11.16 10.20     ~ 671 1
25 NGC 4478 GiP 12 30 17.4160005576 +12 19 42.790577160 12.82 12.36 11.45   10.17 ~ 508 1
26 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
27 NGC 4494 GiP 12 31 24.0391348536 +25 46 30.071664120   10.55 9.74     ~ 491 0
28 NGC 4564 GiG 12 36 26.9869512504 +11 26 21.204472848 12.51 12.05 11.12     ~ 615 1
29 NGC 4589 LIN 12 37 24.9947272593 +74 11 30.861224110   12.0       ~ 300 1
30 NGC 4648 GiG 12 41 44.3891511144 +74 25 15.700353240   12.6       ~ 125 0
31 M 59 GiG 12 42 02.2581375168 +11 38 48.909507756   11.0       ~ 721 0
32 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
33 M 60 GiC 12 43 39.9708251934 +11 33 09.688174067   10.3       ~ 1395 1
34 NGC 4660 GiP 12 44 31.9814021280 +11 11 25.739106972   12.1       ~ 434 0
35 NGC 4914 GiG 13 00 42.9243584856 +37 18 54.890854200   12.7       ~ 93 0
36 NGC 5077 rG 13 19 31.66962921 -12 39 25.0765176   13.87 12.85 11.30   ~ 312 1
37 NGC 5322 SyG 13 49 15.24 +60 11 25.8   11.3       ~ 432 2
38 NGC 5557 GiG 14 18 25.708 +36 29 37.28   12.2       ~ 237 0
39 NGC 5576 GiP 14 21 03.691 +03 16 15.78 12.25 11.85 10.96     ~ 347 1
40 NGC 5638 GiP 14 29 40.3717451400 +03 13 59.987811648 12.57 12.14 11.20     ~ 252 2
41 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 673 2
42 NGC 5831 GiG 15 04 07.0002600408 +01 13 11.705607012   13.1   11.19   ~ 304 0
43 NGC 5982 LIN 15 38 39.778 +59 21 21.21   12.4       ~ 302 0
44 NGC 7619 GiG 23 20 14.524 +08 12 22.63   12.7       ~ 472 0
45 NGC 7626 rG 23 20 42.524 +08 13 01.43   12.8       ~ 438 1

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