2017MNRAS.468L..97O

Query : 2017MNRAS.468L..97O

2017MNRAS.468L..97O - Mon. Not. R. Astron. Soc., 468, L97-L102 (2017/June-2)

Detection of faint broad emission lines in type 2 AGN - II. On the measurement of the black hole mass of type 2 AGN and the unified model.

ONORI F., RICCI F., LA FRANCA F., BIANCHI S., BONGIORNO A., BRUSA M., FIORE F., MAIOLINO R., MARCONI A., SANI E. and VIGNALI C.

Abstract (from CDS):

We report the virial measurements of the black hole (BH) mass of a sample of 17 type 2 active galactic nuclei (AGN), drawn from the Swift/BAT 70-month 14-195 keV hard X-ray catalogue, where a faint BLR component has been measured via deep NIR (0.8-2.5 µm) spectroscopy. We compared the type 2 AGN with a control sample of 33 type 1 AGN. We find that the type 2 AGN BH masses span the 5 < log(MBH/M☉) < 7.5 range, with an average log(MBH/M☉) = 6.7, which is ∼0.8 dex smaller than found for type 1 AGN. If type 1 and type 2 AGN of the same X-ray luminosity log(L_ 14 -195_/erg s–1) ∼ 43.5 are compared, type 2 AGN have 0.5 dex smaller BH masses than type 1 AGN. Although based on few tens of objects, this result disagrees with the standard AGN unification scenarios in which type 1 and type 2 AGN are the same objects observed along different viewing angles with respect to a toroidal absorbing material.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: active - quasars: emission lines - quasars: supermassive black holes - galaxies: Seyfert - infrared: galaxies - infrared: galaxies

Simbad objects: 19

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Number of rows : 19
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 NGC 262 Bla 00 48 47.14147900 +31 57 25.0845702 14.04 13.90 13.06 8.53   ~ 778 2
2 NGC 1052 Bla 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1397 2
3 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
4 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
5 LEDA 178130 Sy2 05 05 45.7302498960 -23 51 14.096256840   16.82 17.0 15.63   ~ 97 0
6 IRAS 05189-2524 Sy2 05 21 01.3994605776 -25 21 45.321827832   15.47 14.75     ~ 545 0
7 Z 31-36 Sy2 08 04 05.8608218112 +05 06 49.823376120   14.55 13.7     ~ 340 2
8 MCG-01-24-012 Sy2 09 20 46.2617017368 -08 03 21.933760068   17.86 17.34     ~ 177 0
9 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 951 3
10 MCG-05-23-016 Sy2 09 47 40.1332188528 -30 56 55.960779696   14.10 13.69 12.44   ~ 611 0
11 ESO 374-44 Sy2 10 13 19.8941358480 -35 58 57.557124732   15.05 15.0 13.93   ~ 67 1
12 Mrk 50 Sy1 12 23 24.1362367968 +02 40 44.449405212   17.25 16.63     ~ 263 1
13 NGC 4395 Sy2 12 25 48.8633109888 +33 32 48.700168152 10.84 10.54 10.11 9.98   ~ 1286 1
14 NGC 6221 Sy2 16 52 46.329 -59 13 00.99   10.90 13.45 9.68 10.4 ~ 328 0
15 LEDA 1365707 Sy2 18 30 50.6344608912 +09 28 41.902626540           ~ 44 0
16 3C 390.3 Bla 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1381 1
17 ESO 234-50 Sy2 20 35 57.8722541808 -50 11 32.172993492   14.38 12.5 13.25   ~ 53 0
18 NGC 7314 Sy2 22 35 46.1985355872 -26 03 01.564993476   11.62 13.11 10.61 11.4 ~ 601 0
19 NGC 7465 Sy2 23 02 00.9603717552 +15 57 53.236032120   13.3       ~ 333 0

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