2016A&A...586A..48B


Query : 2016A&A...586A..48B

2016A&A...586A..48B - Astronomy and Astrophysics, volume 586A, 48-48 (2016/2-1)

The HST view of the innermost narrow line region.

BALMAVERDE B., CAPETTI A., MOISIO D., BALDI R.D. and MARCONI A.

Abstract (from CDS):

We analyze the properties of the innermost narrow line region in a sample of low-luminosity AGN. We select 33 LINERs (bona fide AGN) and Seyfert galaxies from the optical spectroscopic Palomar survey observed by HST/STIS. We find that in LINERs the [NII] and [OI] lines are broader than the [SII] line and that the [ II]/[SII] flux ratio increases when moving from ground-based to HST spectra. This effect is more pronounced considering the wings of the lines. Our interpretation is that, as a result of superior HST spatial resolution, we isolate a compact region of dense ionized gas in LINERs, located at a typical distance of ∼3pc and with a gas density of ∼104-105cm–3, which we identify with the outer portion of the intermediate line region (ILR). Instead, we do not observe these kinds of effects in Seyferts; this may be the result of a stronger dilution from the NLR emission, since the HST slit maps a larger region in these sources. Alternatively, we argue that the innermost, higher density component of the ILR is only present in Seyferts, while it is truncated at larger radii because of the presence of the circumnuclear torus. The ILR is only visible in its entirety in LINERs because the obscuring torus is not present in these sources.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: nuclei - galaxies: Seyfert

Simbad objects: 44

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Number of rows : 44
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 315 LIN 00 57 48.88335 +30 21 08.8122 12.80 12.20 11.16 11.26   ~ 724 2
2 NGC 1052 GiP 02 41 04.79851 -08 15 20.7517 11.84 11.41 10.47 10.71   ~ 1187 2
3 NGC 1358 Sy2 03 33 39.6845285938 -05 05 22.226986857   14.10 13.05 11.76   ~ 186 1
4 NGC 1667 Sy2 04 48 37.205 -06 19 11.47   13.66 12.86 11.72   ~ 340 1
5 NGC 1961 LIN 05 42 04.775 +69 22 42.17   11.73 10.99     ~ 315 3
6 NGC 2273 Sy2 06 50 08.6724567505 +60 50 44.879789544   14.50 13.54     ~ 482 3
7 Mrk 9 Sy1 07 36 57.0265515253 +58 46 13.431867389   14.77 14.37     ~ 220 0
8 NGC 2787 LIN 09 19 18.6043000282 +69 12 11.642887220   12.92 11.79     ~ 326 0
9 NGC 2911 LIN 09 33 46.1074035 +10 09 08.822404   14.96 13.83     ~ 228 0
10 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 4070 5
11 NGC 3227 GiP 10 23 30.57 +19 51 54.3   12.61 11.79     ~ 1575 2
12 NGC 3254 Sy2 10 29 19.922 +29 29 29.18   12.29 11.60     ~ 157 0
13 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 763 1
14 NGC 3516 Sy1 11 06 47.4596406816 +72 34 07.189563769   13.12 12.40     ~ 1442 0
15 NGC 3642 LIN 11 22 17.89416 +59 04 28.2648   14.86 14.04     ~ 193 0
16 NGC 3982 Sy1 11 56 28.13808 +55 07 30.8424   12.20 11.70 11.18   ~ 504 1
17 NGC 3998 SyG 11 57 56.1333561013 +55 27 12.925850484   11.64 12.10 10.09   ~ 590 2
18 NGC 4036 LIN 12 01 26.891 +61 53 44.52   12.18 11.20     ~ 239 0
19 NGC 4051 Sy1 12 03 09.6098828919 +44 31 52.693714606   11.08 12.92 9.94   ~ 2042 1
20 NGC 4138 Sy1 12 09 29.788 +43 41 07.14 12.46 12.29 11.32 10.82   ~ 368 1
21 NGC 4143 LIN 12 09 36.086 +42 32 03.18   13.04 12.08     ~ 219 0
22 NGC 4203 LIN 12 15 05.0543630359 +33 11 50.401356393   12.98 11.99     ~ 463 2
23 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2187 3
24 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1144 0
25 NGC 4278 LIN 12 20 06.8253868 +29 16 50.713486 11.54 11.09 10.16     ~ 902 2
26 NGC 4314 LIN 12 22 31.978 +29 53 43.09 11.72 11.43 10.58     ~ 458 1
27 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1673 2
28 NGC 4450 LIN 12 28 29.634 +17 05 05.82   10.90 10.08     ~ 520 1
29 NGC 4477 Sy2 12 30 02.172 +13 38 11.19 11.98 11.38 10.42     ~ 371 2
30 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6441 3
31 M 88 Sy2 12 31 59.216 +14 25 13.48   14.33 13.18     ~ 750 1
32 M 91 LIN 12 35 26.430 +14 29 46.75   14.63 13.57     ~ 539 0
33 M 58 SyG 12 37 43.597 +11 49 05.12 10.80 10.48 9.66     ~ 996 2
34 M 104 LIN 12 39 59.43185 -11 37 22.9954 9.51 9.55 8.00 8.05   ~ 1302 3
35 NGC 4636 LIN 12 42 49.867 +02 41 16.01   12.62 11.84     ~ 1053 1
36 NGC 4698 Sy2 12 48 22.9112380605 +08 29 14.648866444   13.24 12.27     ~ 452 0
37 M 94 SyG 12 50 53.148 +41 07 12.55 9.15 8.96 8.24 7.78   ~ 1265 2
38 NGC 5005 GiP 13 10 56.312 +37 03 32.19   14.67 13.67     ~ 511 2
39 NGC 5077 GiP 13 19 31.66964077 -12 39 25.0754790   13.87 12.85 11.30   ~ 277 0
40 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3947 4
41 NGC 5377 AGN 13 56 16.6685659057 +47 14 08.562084661   12.39 11.46 10.87 10.25 ~ 216 1
42 NAME Serpens Dwarf GlC 15 16 05.30 -00 06 41.0   15.1       ~ 653 1
43 NGC 6500 LIN 17 55 59.78195 +18 20 17.6713   13.43 12.54     ~ 211 0
44 NGC 6951 Sy2 20 37 14.1181441937 +66 06 20.078027288   11.64 10.65     ~ 505 2

    Equat.    Gal    SGal    Ecl

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2021.07.27-08:23:08

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