1995A&A...298...22M

Query : 1995A&A...298...22M

1995A&A...298...22M - Astronomy and Astrophysics, volume 298, 22-32 (1995/6-1)

Multiwavelength analysis of active galaxies: implications on unified Seyfert models.

MAS-HESSE J.M., RODRIGUEZ-PASCUAL P.M., SANZ FERNANDEZ DE CORDOBA L., MIRABEL I.F., WAMSTEKER W., MAKINO F. and OTANI C.

Abstract (from CDS):

We have analyzed the multiwavelength (radio to X-rays) observational properties of a sample of 111 galaxies covering a wide range of activity (QSO, Seyfert 1 and 2 and star forming galaxies), with the aim of looking for similarities and systematic differences between the different sub-classes, which could provide some clues about the nature of their dominant emission mechanism. Our sample of active galaxies can be divided into two major subgroups: those objects where the far infrared emission clearly dominates the spectral energy distribution (Seyfert 2 and star forming galaxies), and those where the high energy emission (UV to X-rays) is comparable to the far infrared (QSO and Seyfert 1 galaxies). The relative strength of the UV emission provides a further division between QSO and Seyfert 1 galaxies. On the other hand, while Seyfert 2 and star forming galaxies share many observational properties, the former are significantly brighter at X-rays than the latter. Seyfert 2 galaxies are found to show a large spread in properties, overlapping both with Seyfert 1 and star forming galaxies. We have tested the validity of the "unified Seyfert models", which assume that Seyfert 1 and 2 galaxies are intrinsically similar, but seen at different angles through a dense obscuring torus. Seyfert 1 galaxies are significantly brighter at UV and soft X-ray energies than Seyfert 2, as predicted by the unified models, but the measured L_soft X/LUV_ ratios in Seyfert 2 galaxies are in average lower than predicted by the "occultation/reflection" picture. Furthermore, the hard X-ray emission is lower in Seyfert 2 than in Seyfert 1 galaxies. While the data are consistent with the presence of an obscuring torus around the nuclei of at least some Seyfert 2 galaxies (like NGC 1068), it seems that in any case the "active" component in Sy 2 represents a smaller contribution to the energy budget of the whole galaxy than it does in Sy 1 galaxies. A scheme becomes then evident in which the sequence QSO-Sy 1-Sy 2-star forming galaxies is determined mainly by the relative strength of some kind of "active" nucleus with respect to the global emission of stellar origin in the galaxy.

Abstract Copyright: ∼

Journal keyword(s): galaxies: nuclei - galaxies: Seyfert - infrared: galaxies - ultraviolet: galaxies - x-rays: galaxies

Errata: Ton 1541 misprint for Ton 1542

Simbad objects: 109

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Number of rows : 109
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 ICRF J000559.2+160949 Sy1 00 05 59.2378545384 +16 09 49.021968096   16.51 16.40     ~ 291 1
2 Mrk 335 Sy1 00 06 19.5372339024 +20 12 10.617404076   14.19 13.85     ~ 1255 0
3 Mrk 1501 Sy1 00 10 31.00590413 +10 58 29.5042981   15.96 15.40 12.22   ~ 719 0
4 LEDA 1790 Sy1 00 29 13.7012449608 +13 16 03.947778264   15.70 15.41     ~ 446 0
5 87GB 004432.0+030343 Sy1 00 47 05.9186531064 +03 19 54.784830324   16.2 16.37     ~ 147 2
6 NGC 262 Sy2 00 48 47.14147900 +31 57 25.0845702 14.04 13.90 13.06 8.53   ~ 736 3
7 Mrk 1148 Sy1 00 51 54.7633670088 +17 25 58.508879484   16.44 15.96     ~ 159 0
8 Mrk 1502 Sy1 00 53 34.9331107632 +12 41 35.929269132   14.41 14.03     ~ 1169 1
9 LEDA 3237 Sy1 00 54 52.1183662680 +25 25 38.983241532     15.42     ~ 389 0
10 [OKM2018] SWIFT J0056.9+1472 Sy1 00 57 09.9306975096 +14 46 10.142054004   16.56 16.29     ~ 165 0
11 NGC 424 Sy2 01 11 27.6385025496 -38 05 00.421096524   13.76 14.12 12.38 12.8 ~ 324 0
12 Z 385-82 Sy1 01 21 59.8143568104 -01 02 24.367631424   17.04 16.78 11.0   ~ 151 0
13 NGC 520 AG? 01 24 34.90 +03 47 29.4 12.41 12.24 11.42     ~ 514 3
14 Mrk 359 Sy1 01 27 32.5217343720 +19 10 43.839069600   14.89 14.22     ~ 311 0
15 NGC 863 Sy1 02 14 33.5604714720 -00 46 00.181845336   14.48 13.81 17.9   ~ 693 0
16 NGC 931 Sy1 02 28 14.4689104272 +31 18 41.469363324   15.71 14.74     ~ 398 0
17 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4610 2
18 QSO J0311-7651 BLL 03 11 55.2496997640 -76 51 50.848335324 15.27 16.09 16.10 15.33   ~ 225 1
19 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1808 2
20 LEDA 14727 Sy1 04 14 52.6568539056 -07 55 39.688821372   15.66 14.91     ~ 96 0
21 NGC 1566 Sy1 04 20 00.3968473248 -54 56 16.624708764 10.29 10.19 9.73 9.21 10.1 ~ 912 2
22 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1243 3
23 Mrk 1506 Sy1 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2002 2
24 NGC 1614 Sy1 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 669 0
25 NGC 1672 SyG 04 45 42.552 -59 14 50.68 10.29 10.53 9.68 9.53 10.2 ~ 401 1
26 Mrk 1095 Sy1 05 16 11.4092471904 -00 08 59.157166920   14.30 13.92     ~ 891 1
27 QSO B0537-441 BLL 05 38 50.36155950 -44 05 08.9390233   15.77 16.48 16   ~ 885 2
28 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 668 1
29 UGC 3374 Sy1 05 54 53.6080860768 +46 26 21.624853488   15.37 14.62     ~ 524 2
30 Mrk 3 Sy2 06 15 36.2812259376 +71 02 14.837219808 14.21 14.03 12.97     ~ 918 3
31 Mrk 376 Sy1 07 14 15.0840050688 +45 41 55.900253292   15.17 14.62     ~ 188 1
32 Mrk 9 Sy1 07 36 57.0265753824 +58 46 13.432215792   14.77 14.37     ~ 245 0
33 Mrk 79 Sy1 07 42 32.8210670808 +49 48 34.783809768   14.74 14.27     ~ 714 1
34 2MASS J08105865+7602424 Sy1 08 10 58.6641543864 +76 02 42.450451260   15.03 14.71     ~ 471 0
35 2MASX J08382309+6507160 SBG 08 38 23.093 +65 07 16.05     14.16     ~ 130 1
36 NGC 2782 Sy2 09 14 05.1 +40 06 49 12.29 12.30 11.63     ~ 473 3
37 Mrk 704 Sy1 09 18 25.9971991776 +16 18 19.633269600   14.82 14.20     ~ 272 0
38 Mrk 705 Sy1 09 26 03.2694421008 +12 44 03.732389268   15.15 14.60     ~ 328 0
39 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 892 3
40 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5869 6
41 NGC 3125 EmG 10 06 33.318 -29 56 07.32 13.03 13.45 13.00 12.50 13.4 ~ 239 1
42 NGC 3227 Sy1 10 23 30.5765149296 +19 51 54.282206700   12.61 11.79     ~ 1709 1
43 NGC 3310 AGN 10 38 45.85707 +53 30 11.8940   12.45 12.15     ~ 774 1
44 NGC 3448 AG? 10 54 39.240 +54 18 18.82   12.2       ~ 220 1
45 [OKM2018] SWIFT J1104.8+7689 Sy1 11 04 13.8611496720 +76 58 58.194549084   15.70 15.72 15.40   ~ 545 1
46 NGC 3516 Sy1 11 06 47.4632200800 +72 34 07.298374656   13.12 12.40     ~ 1545 0
47 IC 2746 Sy2 11 21 47.1179115936 +11 44 18.909849876   15.38 14.93     ~ 219 0
48 NGC 3783 Sy1 11 39 01.7096819040 -37 44 19.009642992   12.46 13.43 11.33 12.1 ~ 1651 0
49 ICRF J113957.0+654749 Sy1 11 39 57.0254367168 +65 47 49.483232880   16.50 16.32     ~ 519 1
50 NGC 4051 Sy1 12 03 09.6101337312 +44 31 52.682601288   11.08 12.92 9.94   ~ 2167 1
51 LEDA 38224 Sy1 12 04 42.1097215992 +27 54 11.869350264   15.64 15.60     ~ 407 0
52 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3698 2
53 PB 3894 Sy1 12 14 17.6738687784 +14 03 13.182723144   14.46 14.19     ~ 823 0
54 NGC 4253 Sy1 12 18 26.5163572920 +29 48 46.531535472   14.34 13.57     ~ 1042 1
55 PG 1216+069 Sy1 12 19 20.9318278680 +06 38 38.467059252   15.68 15.65     ~ 287 0
56 Mrk 205 Sy1 12 21 44.0724099888 +75 18 38.241006228   15.64 15.24 14.7   ~ 477 0
57 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1347 2
58 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5811 1
59 Ton 1541 Sy1 12 32 +20.1           ~ 1 0
60 NGC 4507 Sy2 12 35 36.6338976888 -39 54 33.710416272   12.95 13.54 11.70 12.4 ~ 497 0
61 QSO J1244+1721B QSO 12 44 10.8247089768 +17 21 04.508869464   16.40 16.09     ~ 152 1
62 LBQS 1244+0238 Sy1 12 46 35.2527826632 +02 22 08.782546368   16.57 16.37     ~ 298 0
63 ICRF J130533.0-103319 Sy1 13 05 33.0150535680 -10 33 19.430383680   15.18 15.23 14.46   ~ 581 1
64 LEDA 45656 Sy1 13 09 47.0031619008 +08 19 48.212362524   16.04 15.89     ~ 391 0
65 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 477 1
66 NGC 5204 LSB 13 29 36.508 +58 25 07.43   11.84   11.37   ~ 471 0
67 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1367 4
68 ESO 445-50 Sy1 13 49 19.2601801224 -30 18 34.213815504   13.81 13.66 12.18 12.35 ~ 807 0
69 Mrk 279 Sy1 13 53 03.4348964112 +69 18 29.410910460   15.15 14.46     ~ 762 0
70 2XMM J135315.8+634546 Sy1 13 53 15.8311116864 +63 45 45.683126676   14.54 14.28     ~ 385 0
71 PB 4142 Sy1 13 54 35.6874184872 +18 05 17.504491992   16.84 16.68     ~ 226 0
72 Mrk 463E Sy2 13 56 02.886 +18 22 18.84   15.01 14.22     ~ 152 1
73 QSO J1409+2618 QSO 14 09 23.9085820008 +26 18 21.056458176   16.07 15.74     ~ 191 0
74 NGC 5506 Sy2 14 13 14.8761010056 -03 12 27.556909272   15.25 14.38     ~ 1094 0
75 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2716 0
76 [OKM2018] SWIFT J1419.0-1323 Sy1 14 19 03.8170514760 -13 10 44.785212600   16.46 16.10 16.50   ~ 237 0
77 Ton 202 Sy1 14 27 35.6076948744 +26 32 14.541190476   15.96 16.00     ~ 307 1
78 Mrk 1383 Sy1 14 29 06.5720038632 +01 17 06.155007252   15.21 14.87     ~ 463 0
79 NGC 5643 Sy2 14 32 40.778 -44 10 28.60   11.03 13.60 9.92 10.6 ~ 573 0
80 NGC 5674 Sy2 14 33 52.2788150880 +05 27 30.117378924   13.7 13.70     ~ 184 0
81 NGC 5728 Sy2 14 42 23.8918506576 -17 15 11.240783784   14.34 13.40     ~ 597 0
82 Mrk 841 Sy1 15 04 01.1935384104 +10 26 15.780409692   14.50 14.27     ~ 652 0
83 MCG-01-40-001 Sy2 15 33 20.6989389552 -08 42 01.777729392   14.76 15.7 13.04   ~ 86 1
84 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2963 4
85 Mrk 290 Sy1 15 35 52.4031021552 +57 54 09.515660508   15.55 15.27     ~ 532 0
86 ICRF J154743.5+205216 Sy1 15 47 43.5376371336 +20 52 16.612810320   16.80 16.69 15.70   ~ 503 0
87 Mrk 876 Sy1 16 13 57.1795021224 +65 43 09.952685328   16.03 15.49     ~ 584 0
88 Ton 256 Sy1 16 14 13.2050129832 +26 04 16.221218880   16.06 16.50     ~ 267 1
89 Mrk 877 Sy1 16 20 11.2799789400 +17 24 27.515242152   15.79 15.39     ~ 273 0
90 3C 351.0 Sy1 17 04 41.3742408840 +60 44 30.520617000   15.65 15.40 15.30   ~ 759 1
91 Mrk 507 Sy1 17 48 38.423 +68 42 16.06   16.33 15.45     ~ 150 1
92 ICRF J184208.9+794617 Sy1 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1317 0
93 ESO 141-55 Sy1 19 21 14.1473895816 -58 40 12.982437480   14.36 13.64 13.28   ~ 365 0
94 NGC 6814 Sy1 19 42 40.5862186152 -10 19 25.108718844   15.33 14.21 11.7 11.3 ~ 809 0
95 Mrk 509 Sy1 20 44 09.7504483224 -10 43 24.727155528   13.35 13.12 10.7   ~ 1279 0
96 IC 5063 Sy2 20 52 02.15 -57 04 06.7   12.92 13.60 11.30   ~ 653 1
97 Mrk 1513 Sy1 21 32 27.8162556672 +10 08 19.252365396   14.92 14.64     ~ 614 0
98 ICRF J214335.5+174348 Sy1 21 43 35.54456275 +17 43 48.7875890   15.91 15.73 15.17   ~ 390 1
99 NGC 7213 Sy1 22 09 16.2100443720 -47 10 00.115999716   10.97 12.08 10.50 10.6 ~ 656 0
100 Mrk 304 Sy1 22 17 12.2637639888 +14 14 20.917852980   15.02 14.66     ~ 356 0
101 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2101 3
102 NGC 7496 Sy2 23 09 47.2876854912 -43 25 40.279652796   11.92 13.90 10.95 11.5 ~ 294 1
103 NGC 7552 Sy1 23 16 10.66 -42 35 04.7 11.34 11.22 10.57 10.08 11.1 ~ 552 3
104 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 908 2
105 NGC 7590 Sy1 23 18 54.7949760192 -42 14 20.515300476   12.12 13.76 11.06 11.8 ~ 277 1
106 NGC 7714 GiP 23 36 14.1257730600 +02 09 18.197422668   14.91 14.36     ~ 765 1
107 APG 284 PaG 23 36 19 +02 09.3   12.6       ~ 607 0
108 ICRF J234636.8+093045 Sy1 23 46 36.8384562240 +09 30 45.514903032   16.23 15.97 15.99   ~ 321 2
109 ICRF J235156.1-010913 Sy1 23 51 56.1224889360 -01 09 13.315371768   16.83 16.59     ~ 358 1

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