1999ApJ...526L...5L

Query : 1999ApJ...526L...5L

1999ApJ...526L...5L - Astrophys. J., 526, L5-L8 (1999/November-3)

Two different accretion classes in Seyfert 1 galaxies and QSOs.

LU Y. and YU Q.

Abstract (from CDS):

The mass of the central black holes in Seyfert galaxies and QSOs can be determined from the broad emission lines and the reverberation method. Using the measured black hole mass and the bolometric or ionizing luminosity, the accretion rate can be estimated. Compiling a sample of Seyfert 1 galaxies and QSOs with reliable central masses, estimated ionizing luminosities, and X-ray spectral slopes, we find that the X-ray spectral slope strongly correlates with the accretion rate. The objects in the sample are found to be distributed in two distinct classes in the spectral index versus log(Lion/LEdd)-plane. We argue that these two classes may correspond to advection-dominated accretion flow (ADAF) and thin disk accretion. The observations of a ``two-state'' Seyfert 1 galaxy, 1H 0419-577, confirm our results. Detailed fitting of the spectra of individual Seyfert 1 galaxies and QSOs using ADAF and/or thin disk models should further clarify the two-class classification.

Abstract Copyright: ∼

Journal keyword(s): Accretion, Accretion Disks - Galaxies: Active - Galaxies: Seyfert - Galaxies: Quasars: General

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 Mrk 335 Sy1 00 06 19.5372339024 +20 12 10.617404076   14.19 13.85     ~ 1344 0
2 LEDA 3237 Sy1 00 54 52.1183662680 +25 25 38.983241532     15.42     ~ 421 0
3 [OKM2018] SWIFT J0056.9+1472 Sy1 00 57 09.9306975096 +14 46 10.142054004   16.56 16.29     ~ 167 0
4 ESO 113-45 Sy1 01 23 45.7631533440 -58 48 20.808928944   14.08 13.83 13.34   ~ 965 0
5 Mrk 586 Sy1 02 07 49.8619039200 +02 42 55.876760568   15.67 15.41     ~ 192 0
6 NGC 863 Sy2 02 14 33.5604714720 -00 46 00.181845336   14.48 13.81 17.9   ~ 770 0
7 LB 1727 Sy1 04 26 00.7188165240 -57 12 01.769902992 13.68 14.58 14.37 14.8   ~ 307 0
8 MCG+01-12-009 Bla 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2099 2
9 Z 395-23 Sy1 05 16 11.4092471904 -00 08 59.157166920   14.30 13.92     ~ 953 1
10 Z 235-30 Sy1 07 42 32.8210670808 +49 48 34.783809768   14.74 14.27     ~ 769 1
11 2MASS J08105865+7602424 Sy1 08 10 58.6641543864 +76 02 42.450451260   15.03 14.71     ~ 508 0
12 Mrk 110 Sy1 09 25 12.8479065576 +52 17 10.386311208   16.82 16.41     ~ 681 1
13 Ton 1057 Sy1 09 25 54.7145627448 +19 54 05.064888348   16.02 15.89     ~ 187 0
14 PG 0953+414 Sy1 09 56 52.3931554992 +41 15 22.211247636 14.710 15.611 15.546 15.294 14.720 ~ 472 0
15 4C 13.41 Sy1 10 07 26.0965408440 +12 48 56.184940764   15.81 15.68     ~ 418 2
16 2MASS J10145491+0033374 Sy1 10 14 54.9035635608 +00 33 37.366161048   20.23 18.94 16.104   ~ 169 0
17 NGC 3227 Sy1 10 23 30.5765149296 +19 51 54.282206700   12.61 11.79     ~ 1807 2
18 HE 1029-1401 Sy1 10 31 54.3173785536 -14 16 51.378102372   14.08 13.86     ~ 140 0
19 NGC 3516 Sy1 11 06 47.4632200800 +72 34 07.298374656   13.12 12.40     ~ 1638 0
20 Ton 1388 Sy1 11 19 08.6786220240 +21 19 17.987085948   14.91 14.80     ~ 492 0
21 NGC 3783 Sy1 11 39 01.7096819040 -37 44 19.009642992   12.46 13.43 11.33 12.1 ~ 1765 1
22 NGC 4051 Sy1 12 03 09.6101337312 +44 31 52.682601288   11.08 12.92 9.94   ~ 2270 1
23 QSO J1204+2754 Bla 12 04 42.1097215992 +27 54 11.869350264   15.64 15.60     ~ 429 0
24 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3938 2
25 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2512 4
26 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
27 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1179 0
28 QSO J1305-1033 Bla 13 05 33.0150535680 -10 33 19.430383680   15.18 15.23 14.46   ~ 624 1
29 LEDA 45656 Sy1 13 09 47.0031619008 +08 19 48.212362524   16.04 15.89     ~ 412 0
30 Ton 1565 Bla 13 12 17.7526981968 +35 15 21.086467128   15.45 15.64 14.2   ~ 292 1
31 IC 4329A Sy1 13 49 19.2601801224 -30 18 34.213815504   13.81 13.66 12.18 12.35 ~ 876 1
32 Z 336-28 Sy1 13 53 03.4348964112 +69 18 29.410910460   15.15 14.46     ~ 812 1
33 Ton 182 Sy1 14 05 16.2178674936 +25 55 34.117540788   15.42 15.34     ~ 268 0
34 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2895 0
35 Z 296-15 Sy1 14 36 22.0820611632 +58 47 39.394934844   14.19 13.79     ~ 592 0
36 2MASS J14464593+4035057 Sy1 14 46 45.9392259288 +40 35 05.797233636   16.28 16.11     ~ 302 0
37 ICRF J154743.5+205216 Sy1 15 47 43.5376371336 +20 52 16.612810320   16.80 16.69 15.70   ~ 521 1
38 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
39 3C 390.3 Bla 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1381 1
40 Mrk 509 Sy1 20 44 09.7504483224 -10 43 24.727155528   13.35 13.12 10.7   ~ 1370 0
41 ICRF J213745.1-143255 Sy1 21 37 45.1959922824 -14 32 55.695508728 15.41 15.63 15.53 15.0   ~ 390 1
42 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2253 3
43 4C -01.61 BLL 23 51 56.1224889360 -01 09 13.315371768   16.83 16.59     ~ 380 1

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