2013A&A...558A.124C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST08:10:29

2013A&A...558A.124C - Astronomy and Astrophysics, volume 558A, 124-124 (2013/10-1)

ALMA observations of feeding and feedback in nearby Seyfert galaxies: an AGN-driven outflow in NGC 1433.

COMBES F., GARCIA-BURILLO S., CASASOLA V., HUNT L., KRIPS M., BAKER A.J., BOONE F., ECKART A., MARQUEZ I., NERI R., SCHINNERER E. and TACCONI L.J.

Abstract (from CDS):

We report ALMA observations of CO(3-2) emission in the Seyfert 2 galaxy NGC1433 at the unprecedented spatial resolution of 0.5"=24pc. Our aim is to probe active galactic nucleus (AGN) feeding and feedback phenomena through the morphology and dynamics of the gas inside the central kpc. The galaxy NGC1433 is a strongly barred spiral with three resonant rings: one at the ultra-harmonic resonance near corotation, and the others at the outer and inner Lindblad resonances (OLR and ILR). A nuclear bar of 400pc radius is embedded in the large-scale primary bar. The CO map, which covers the whole nuclear region (nuclear bar and ring), reveals a nuclear gaseous spiral structure, inside the nuclear ring encircling the nuclear stellar bar. This gaseous spiral is well correlated with the dusty spiral seen in Hubble Space Telescope (HST) images. The nuclear spiral winds up in a pseudo-ring at ∼200pc radius, which might correspond to the inner ILR. Continuum emission is detected at 0.87 mm only at the very centre, and its origin is more likely thermal dust emission than non-thermal emission from the AGN. It might correspond to the molecular torus expected to exist in this Seyfert 2 galaxy. The HCN(4-3) and HCO+(4-3) lines were observed simultaneously, but only upper limits are derived, with a ratio to the CO(3-2) line lower than 1/60 at 3σ, indicating a relatively low abundance of very dense gas. The kinematics of the gas over the nuclear disk reveal rather regular rotation only slightly perturbed by streaming motions due to the spiral; the primary and secondary bars are too closely aligned with the galaxy major or minor axis to leave a signature in the projected velocities. Near the nucleus, there is an intense high-velocity CO emission feature redshifted to 200km/s (if located in the plane), with a blue-shifted counterpart, at 2" (100pc) from the centre. While the CO spectra are quite narrow in the centre, this wide component is interpreted as an outflow involving a molecular mass of 3.6x106M and a flow rate ∼7M/yr. The flow could be in part driven by the central star formation, but is mainly boosted by the AGN through its radio jets.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual: NGC 1433 - galaxies: ISM - galaxies: kinematics and dynamics - galaxies: nuclei - galaxies: spiral

Errata: + corrigendum vol. 564, p. C1 (2014)

Simbad objects: 14

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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 - 2020
#notes
1 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4093 2
2 NGC 1266 AGN 03 16 00.749 -02 25 38.53   14   12.46   ~ 256 1
3 QSO B0332-403 BLL 03 34 13.6547438706 -40 08 25.401996186 18.54 18.35 17.87 17.5   ~ 266 1
4 NGC 1377 GiG 03 36 39.077 -20 54 08.14   13.38   12.12   ~ 194 0
5 NGC 1433 GiG 03 42 01.553 -47 13 19.49   10.84 9.99 9.61 10.2 ~ 305 0
6 NAME NGC 1566 Group GrG 04 20 00.6 -54 56 17           ~ 128 0
7 NGC 2782 Sy2 09 14 05.120 +40 06 49.68 12.29 12.30 11.63     ~ 432 3
8 NGC 3147 Sy2 10 16 53.632 +73 24 02.34   11.43 10.61     ~ 425 2
9 M 66 GiP 11 20 15.026 +12 59 28.64 9.85 9.65 8.92     ~ 1159 4
10 M 58 SyG 12 37 43.597 +11 49 05.12 10.80 10.48 9.66     ~ 969 2
11 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1781 3
12 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2683 4
13 NGC 6574 GiG 18 11 51.2462161679 +14 58 54.740459628   12.5       ~ 170 0
14 NGC 6764 LIN 19 08 16.348 +50 55 59.14   15.00 14.32     ~ 276 1

    Equat.    Gal    SGal    Ecl

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2020.07.13-08:10:29

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