2023A&A...671A..26D


Query : 2023A&A...671A..26D

2023A&A...671A..26D - Astronomy and Astrophysics, volume 671A, 26 (2023/3-1)

Spiral arms in broad-line regions of active galactic nuclei II. Loosely wound cases: Reverberation properties.

DU P. and WANG J.-M.

Abstract (from CDS):

There is growing evidence that broad-line regions (BLRs) in active galactic nuclei (AGNs) have regular substructures, such as spiral arms. This is supported by the fact that the radii of BLRs measured by reverberation mapping (RM) observations are generally consistent with the self-gravitating regions of accretion disks. We showed in Paper I that the spiral arms excited by the gravitational instabilities in these regions may exist in some disk-like BLRs. Here, in the second paper of the series, we investigate the loosely wound spiral arms excited by gravitational instabilities in disk-like BLRs and present their observational characteristics. We solve the governing integro-differential equation by a matrix scheme. The emission-line profiles, velocity-delay maps, and velocity-resolved lags of the BLR spiral arms are calculated. We find that the spiral arms can explain some of the phenomena seen in observations: (1) different asymmetries in the emission-line profiles in the mean and rms spectra; (2) complex subfeatures (incomplete ellipse) in some velocity-delay maps, for example that of NGC 5548; and (3) the short timescales of the asymmetry changes in emission-line profiles (rms spectra). These features are attractive for modeling the observed line profiles and the properties of reverberation, and for revealing the details of the BLR geometry and kinematics.

Abstract Copyright: © The Authors 2023

Journal keyword(s): galaxies: active - quasars: emission lines - quasars: general

Simbad objects: 14

goto Full paper

goto View the references in ADS

Number of rows : 14
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 Mrk 1506 Sy1 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2002 2
2 IC 450 Sy1 06 52 12.3346265592 +74 25 37.121227716   15.16 14.19     ~ 571 1
3 NGC 2617 Sy1 08 35 38.7981089496 -04 05 17.901104280   13.6   12.63 13.2 ~ 185 0
4 Mrk 704 Sy1 09 18 25.9971991776 +16 18 19.633269600   14.82 14.20     ~ 272 0
5 Mrk 715 Sy1 10 04 47.6140740048 +14 46 45.525559548   16.79 15.80     ~ 48 0
6 NGC 3227 Sy1 10 23 30.5765149296 +19 51 54.282206700   12.61 11.79     ~ 1709 1
7 NGC 3516 Sy1 11 06 47.4632200800 +72 34 07.298374656   13.12 12.40     ~ 1545 0
8 Mrk 40 Sy1 11 25 36.1539761184 +54 22 57.113791824   17.06 16.47     ~ 275 0
9 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3698 2
10 Mrk 202 Sy1 12 17 54.9746101392 +58 39 35.609855652   16.82 16.39     ~ 92 0
11 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1091 0
12 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2716 0
13 ICRF J184208.9+794617 Sy1 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1317 0
14 NGC 6814 Sy1 19 42 40.5862186152 -10 19 25.108718844   15.33 14.21 11.7 11.3 ~ 809 0

To bookmark this query, right click on this link: simbad:objects in 2023A&A...671A..26D and select 'bookmark this link' or equivalent in the popup menu