2021ApJ...917..107S

Query : 2021ApJ...917..107S

2021ApJ...917..107S - Astrophys. J., 917, 107-107 (2021/August-3)

Strong correlation between Fe II/Mg II ratio and Eddington ratio of type 1 active galactic nuclei.

SHIN J., WOO J.-H., NAGAO T., KIM M. and BAHK H.

Abstract (from CDS):

The Fe II/Mg II line flux ratio has been used as an indicator of the Fe/Mg abundance ratio in the broad-line region (BLR) of active galactic nuclei (AGNs). On the basis of archival rest-frame UV spectra obtained via the Hubble Space Telescope and the Sloan Digital Sky Survey, we investigate the Fe II/Mg II ratios of type 1 AGNs at z < 2. Over wide dynamic ranges of AGN properties (i.e., black hole mass, AGN luminosity, and Eddington ratio), we confirm that the Fe II/Mg II ratio strongly correlates with Eddington ratio but not with black hole mass, AGN luminosity, or redshift. Our results suggest that the metallicity in the BLR are physically related to the accretion activity of AGNs, but not to the global properties of galaxies (i.e., galaxy mass and luminosity). With regard to the relation between the BLR metallicity and the accretion rate of AGNs, we discuss that metal cooling may play an important role in enhancing the gas inflow into the central region of host galaxies, resulting in the high accretion rate of AGNs.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Active galaxies - Active galactic nuclei - Interstellar medium - Interstellar line emission - Ultraviolet astronomy

Simbad objects: 38

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Number of rows : 38
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 2MASX J00122399-1022269 Sy1 00 12 24.0235889448 -10 22 26.551199748   17.59 17.25     ~ 61 0
3 LEDA 87392 Sy1 00 39 15.8339634552 -51 17 01.481641692   15.77 15.28 15.66   ~ 134 0
4 NGC 262 Bla 00 48 47.14147900 +31 57 25.0845702 14.04 13.90 13.06 8.53   ~ 778 2
5 ESO 113-45 Sy1 01 23 45.7631533440 -58 48 20.808928944   14.08 13.83 13.34   ~ 965 0
6 2MASS J01341690-4258262 Sy1 01 34 16.9072341600 -42 58 26.223391344   18.17 17.30 16.71   ~ 81 1
7 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
8 2MASS J01553002-0857040 Sy1 01 55 30.0252391488 -08 57 04.130375616   17.26 17.02 16.89   ~ 74 0
9 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
10 Z 395-23 Sy1 05 16 11.4092471904 -00 08 59.157166920   14.30 13.92     ~ 953 1
11 IRAS 05189-2524 Sy2 05 21 01.3994605776 -25 21 45.321827832   15.47 14.75     ~ 545 0
12 Z 329-24 Sy2 06 15 36.2812259376 +71 02 14.837219808 14.21 14.03 12.97     ~ 960 2
13 Ton 951 Sy1 08 47 42.4485615096 +34 45 04.482515304   14.83 14.50     ~ 487 0
14 Mrk 110 Sy1 09 25 12.8479065576 +52 17 10.386311208   16.82 16.41     ~ 681 1
15 2MASS J09460395+0139235 Sy1 09 46 03.9477025248 +01 39 23.759312004   18.10 17.62     ~ 45 0
16 NGC 3227 Sy1 10 23 30.5765149296 +19 51 54.282206700   12.61 11.79     ~ 1807 2
17 NGC 3516 Sy1 11 06 47.4632200800 +72 34 07.298374656   13.12 12.40     ~ 1638 0
18 Z 291-51 Sy1 11 18 57.7039218648 +58 03 23.629382172   17.12 16.69     ~ 119 0
19 MCG+09-19-073 Sy1 11 25 36.1539761184 +54 22 57.113791824   17.06 16.47     ~ 311 0
20 NGC 3783 Sy1 11 39 01.7096819040 -37 44 19.009642992   12.46 13.43 11.33 12.1 ~ 1765 1
21 IC 754 EmG 11 59 23.5566958680 -01 39 16.291362888   14.05       ~ 34 1
22 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3938 2
23 Mrk 50 Sy1 12 23 24.1362367968 +02 40 44.449405212   17.25 16.63     ~ 263 1
24 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
25 2MASS J12514225+2404355 Sy1 12 51 42.2831383848 +24 04 35.241296340   18.26 17.89     ~ 35 0
26 2E 2879 Sy1 12 52 26.3561235816 +56 34 19.573734864   18.42 18.11 17.660   ~ 293 2
27 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
28 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1331 1
29 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2895 0
30 Z 195-3 Sy1 15 59 09.6231720696 +35 01 47.561352852   15.69 15.06     ~ 346 0
31 2MASX J17021115+6058480 Sy1 17 02 11.1386645616 +60 58 48.051320124   19.21 18.50     ~ 46 1
32 2MASS J17144850+3327383 Sy1 17 14 48.5066899320 +33 27 38.301984252   17.40 17.10     ~ 26 1
33 Z 229-15 Sy1 19 05 25.9385931648 +42 27 39.759455520   15.4       ~ 146 0
34 NGC 6814 Sy1 19 42 40.5862186152 -10 19 25.108718844   15.33 14.21 11.7 11.3 ~ 866 0
35 Mrk 509 Sy1 20 44 09.7504483224 -10 43 24.727155528   13.35 13.12 10.7   ~ 1370 0
36 4C 31.63 BLL 22 03 14.9756830008 +31 45 38.269473228   15.85 15.58 14.33   ~ 523 1
37 NAME MR 2251-178 Sy1 22 54 05.8858611984 -17 34 55.402233708   14.99 14.36 15.12   ~ 467 4
38 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2253 3

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