2019ApJ...874L..32C


Query : 2019ApJ...874L..32C

2019ApJ...874L..32C - Astrophys. J., 874, L32-L32 (2019/April-1)

Imaging the active galactic nucleus torus in Cygnus A.

CARILLI C.L., PERLEY R.A., DHAWAN V. and PERLEY D.A.

Abstract (from CDS):

We present the first direct imaging of what may be the thick torus in the active galactic nucleus (AGN) of the archetype powerful radio galaxy Cygnus A, using the Jansky Very Large Array at 18-48 GHz, with a resolution down to 45 mas. Such a torus has long been a key component of AGN models, but direct imaging on the relevant physical scales in sources of extreme (quasar-like) luminosities, remains scarce. An elongated structure, perpendicular to the radio jets and centered on the core, is well resolved, with a full length of 0.''48 (528 pc), and a full width of 0.''26 (286 pc). The radio emission spectrum is consistent with optically thin free-free emission. We present a toy model of a flaring torus, with a half-opening angle for the poloidal region of 62°. The radio jets are oriented along the poles. The observations require a clumpy gas distribution, with the free-free emission dominated by clumps with densities >=4000 cm–3.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): accretion, accretion disks - galaxies: active - galaxies: individual: Cygnus A - galaxies: jets - galaxies: nuclei

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2606 2
2 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4225 2
3 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3665 3
4 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5458 1
5 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4111 3
6 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825107   17.51 17.25     ~ 3892 2
7 3C 295 Sy2 14 11 20.467 +52 12 09.52   22.34 20.80 18.54   ~ 919 5
8 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1050 2
9 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2177 2
10 QSO B2005+40 QSO 20 07 44.9443187008 +40 29 48.601470737   18.5 19 20.3   ~ 277 1

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2021.08.06-04:22:28

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