2021MNRAS.506.3797Z

Query : 2021MNRAS.506.3797Z

2021MNRAS.506.3797Z - Mon. Not. R. Astron. Soc., 506, 3797-3809 (2021/September-3)

Far-UV Fe emission as proxy of Eddington ratios.

ZHENG W.

Abstract (from CDS):

The Eddington ratio is a key parameter that governs the diversity of quasar properties. It can be scaled with a strong anticorrelation between optical Fe IIopt and [O III] emission. In search of such indicators in the far-UV band, the Hubble Space Telescope far-UV spectra of 150 low-redshift quasars are analysed in combination with their optical SDSS counterparts. The strength of Fe II+Fe III λ1123 emission is significantly correlated with that of Fe IIopt. A moderate correlation may also exist between Fe II λ1071 and Fe IIopt. The finding opens the possibility that far-UV Fe II emission may serve as a new gauge of the Eddington ratios. The high- and low-ionization lines in the far-UV band display different patterns: for the quasars with higher Eddington ratios, the low-ionization UV lines are stronger, and the high-ionization lines are broader and weaker.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): quasars: emission line - quasars: general

Simbad objects: 20

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Number of rows : 20
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 1RXS J010227.1-003911 Sy1 01 02 26.3183653728 -00 39 04.529536668   16.82 16.54 15.6   ~ 68 0
2 2MASSI J0904232+400704 Sy1 09 04 23.3156980752 +40 07 04.698508080   17.29 17.18     ~ 41 0
3 QSO J0912+2957 QSO 09 12 35.4243451608 +29 57 25.464100032   18.21 17.97     ~ 26 0
4 SBSG 0924+606B Bla 09 28 37.9886806104 +60 25 21.018272772   17.53 17.20     ~ 88 1
5 Ton 488 Sy1 10 10 00.6871776552 +30 03 21.574537668   17.35 17.00     ~ 81 0
6 [VV2000] J101030.6+255948 QSO 10 10 30.5517938904 +25 59 49.472284812   17.00 16.94     ~ 28 0
7 ICRF J110715.0+162802 Sy1 11 07 15.0475336176 +16 28 02.244766584   15.91 15.70     ~ 172 1
8 2MASS J11200742+4235517 Sy1 11 20 07.4313427152 +42 35 51.389354292   17.91 17.69     ~ 36 1
9 LEDA 90159 Sy1 12 02 26.7665445864 -01 29 15.399814956   17.81 17.54 17.534   ~ 101 0
10 7C 1208+3213 Sy1 12 10 37.5729097488 +31 57 06.019112484   16.91 16.68     ~ 92 1
11 QSO B1217+023 BLL 12 20 11.8846520568 +02 03 42.223956876   16.15 15.97 15.6   ~ 338 2
12 LBQS 1230-0015 Bla 12 33 04.0514120328 -00 31 34.179576564   18.02 17.87 16.8   ~ 75 1
13 LB 2522 Sy1 13 01 12.9250750776 +59 02 06.693816732   16.04 15.89     ~ 298 0
14 2MASS J13232523+3430593 Sy1 13 23 25.2450348504 +34 30 59.308784280   17.26 17.09     ~ 32 0
15 2MASS J13305328+3119306 Sy1 13 30 53.2737822312 +31 19 30.581964264   17.65 17.41     ~ 60 0
16 2MASS J15193615+2838276 Sy1 15 19 36.1450484448 +28 38 27.667272408   17.58 17.30     ~ 33 1
17 Ton 236 Sy1 15 28 40.6111052016 +28 25 29.842820004   16.44 16.39     ~ 76 0
18 2MASS J16171142+0638333 Sy1 16 17 11.4239524104 +06 38 33.432463716   17.42 17.25     ~ 43 1
19 2MASS J16194057+2543231 Sy1 16 19 40.5651150432 +25 43 23.128020840   17.02 16.66     ~ 45 0
20 2E 3648 Sy1 16 20 21.8185395384 +17 36 23.952361176   16.53 16.41 20.5   ~ 425 2

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