2008A&A...488...83S

Query : 2008A&A...488...83S

2008A&A...488...83S - Astronomy and Astrophysics, volume 48883-90 (2008/9-2)

Nuclear activity in nearby galaxies. Mid-infrared imaging with the VLT.

SIEBENMORGEN R., HAAS M., PANTIN E., KRUEGEL E., LEIPSKI C., KAEUFL H.U., LAGAGE P.O., MOORWOOD A., SMETTE A. and STERZIK M.

Abstract (from CDS):

Dust enshrouded activity can be studied ideally by mid-infrared (MIR) observations. To explore the active galactic nuclei (AGN) versus star forming origin of the nuclear MIR emission of galaxies, observations of high spatial resolution are required. We report on 11.3µm observations with VISIR at the VLT, which reach 0.35'' spatial resolution (FWHM). During the scientific verification of VISIR, we observed a sample of 36 nearby galaxies with a range of optically classified nuclear activity: 17 black hole driven AGN, 10 starbursts (SB), and 9 quiescent spirals. 16 objects out of 17 AGN are detected and unresolved, 5 out of 10 SB are detected and resolved with structured emission up to a few arcsec, while for 5 targets out of 10 SB and all 9 quiet nuclei low upper limits are provided. The morphology of the resolved SB nuclei is similar to that observed at radio frequencies. The compactness of AGN and the extent of SB nuclei is consistent with the predictions of radiative transfer models and Spitzer spectra observed at much lower spatial resolution than with VISIR. We introduce the nuclear MIR surface brightness, S, as a quantitative measurement for AGN and SB activity. Although one is unable to distinguish between AGN and SB activity using the nuclear MIR surface brightness derived from 4m class telescopes, our data indicate that, out to a distance of 100Mpc, the MIR surface brightness acquired by 8m class telescopes can differentiate AGN from SB behavior.

Abstract Copyright: ∼

Journal keyword(s): infrared: galaxies - galaxies: nuclei - galaxies: active - galaxies: spiral - galaxies: starburst

Simbad objects: 43

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Number of rows : 43
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 IC 1623A EmG 01 07 46.57800 -17 30 22.2192   14.34   12.71   ~ 66 1
2 IC 1623B Sy1 01 07 47.569 -17 30 25.04   15.04   14.07   ~ 78 1
3 NGC 838 LIN 02 09 38.562 -10 08 46.12   13.72   12.65   ~ 211 1
4 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
5 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1448 3
6 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
7 NGC 1386 Sy1 03 36 46.238 -35 59 57.39 12.42 12.16 11.23 10.76   ~ 553 1
8 NGC 1482 EmG 03 54 38.928 -20 30 08.82 13.15 13.14 12.15 11.29   ~ 313 2
9 NGC 1614 Sy1 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 697 1
10 NGC 1797 Sy1 05 07 44.883 -08 01 08.57   14.42   13.22   ~ 96 0
11 ESO 163-11 GiG 07 38 05.528 -55 11 26.70   13.6   13.5 13.0 ~ 54 0
12 ESO 493-16 GiG 07 48 43.8549292704 -26 14 46.849708392   14.1   14.0 13.6 ~ 40 1
13 NGC 2706 GiG 08 56 12.31200 -02 33 48.3300   13.8       ~ 64 1
14 ESO 126-2 AGN 09 13 30.183 -60 47 22.15   13.60   12.47   ~ 43 0
15 ESO 91-16 GiG 09 38 13.641 -63 29 11.36   14.15       ~ 39 0
16 ESO 61-11 AG? 09 38 19.585 -70 05 28.63   14.82   13.32   ~ 27 0
17 NGC 2966 GiP 09 42 11.5147585416 +04 40 23.485202148   14.0       ~ 121 0
18 Z 7-49 Sy1 09 52 19.168 -01 36 44.10   14.99 14.39 11.2   ~ 348 1
19 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
20 MCG-04-25-006 Sy2 10 24 31.4324894928 -23 33 10.567872576   14.45 14.21 12.89   ~ 82 1
21 MCG-06-23-027 Sy1 10 24 42.488 -39 18 21.38   13.96   12.27   ~ 50 2
22 NGC 3256 Sy2 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 920 2
23 NGC 3366 Sy2 10 35 08.28 -43 41 30.5   12.77   11.04 11.0 ~ 44 1
24 NGC 3318 Sy2 10 37 15.5052550728 -41 37 38.912719512   12.71 11.97 11.77 12.4 ~ 107 0
25 ESO 93-3 AG? 10 59 26.0621043696 -66 19 58.317477456   13.9   13.4 12.9 ~ 41 0
26 NGC 3783 Sy1 11 39 01.7096819040 -37 44 19.009642992   12.46 13.43 11.33 12.1 ~ 1765 1
27 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1433 2
28 NGC 4355 Sy2 12 26 54.6206739120 -00 52 39.421212996   14.21 13.37     ~ 527 2
29 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
30 NGC 4746 GiG 12 51 55.371 +12 04 58.90   13.3       ~ 162 1
31 NGC 4900 AGN 13 00 39.1193785512 +02 30 05.154593868   12.8       ~ 267 1
32 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
33 NGC 5258 GiP 13 39 57.6768310848 +00 49 51.009668076   13.8 12.83     ~ 186 0
34 APG 271 IG 14 03 25.45 -06 02 59.9           ~ 209 0
35 NGC 5427 Sy1 14 03 26.0408044536 -06 01 50.682790236   14.67 13.96 11.54   ~ 307 0
36 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1331 1
37 NGC 5786 GiG 14 58 56.254 -42 00 48.27   12       ~ 51 0
38 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
39 NGC 6000 Sy2 15 49 49.556 -29 23 12.50   13.02   11.27 12.0 ~ 116 1
40 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
41 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2253 3
42 NGC 7552 Sy1 23 16 10.66 -42 35 04.7 11.34 11.22 10.57 10.08 11.1 ~ 574 3
43 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 978 3

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